MariaDB Difference Between Two Dates

In this MariaDB tutorial, we will discuss the implementation of the MariaDB Difference Between Two Dates and also look at several examples related to it. There are lists of the topic that comes under discussion:

• MariaDB Difference between two dates
• MariaDB Difference between two dates and today
• MariaDB Difference between two dates between
• MariaDB Difference between two dates Date
• MariaDB Difference between two dates Day
• MariaDB Difference between two dates End Date
• MariaDB Difference between two dates Group By
• MariaDB Difference between two dates Greater Than
• MariaDB Difference between two dates having
• MariaDB Difference between two dates hours
• MariaDB Difference between two dates like
• MariaDB Difference between two dates less than
• MariaDB Difference between two dates Max
• MariaDB Difference between two dates Min
• MariaDB Difference between two dates Today
• MariaDB Difference between two dates Update
• MariaDB Difference between two dates WeekDays
• MariaDB Difference between two dates Yesterday
• MariaDB Difference between two dates Year

MariaDB Difference Between Two Dates

Here we will learn and understand how to use the MariaDB DATEDIFF function on a MariaDB table. And which is explained with the help of an example.

In MariaDB, the DATEDIFF function is used to return the difference between two date values in days. Here is an illustrated example of the MariaDB DATEDIFF function on the DATE column of the table by the following query:

EXAMPLE:

SELECT FULL_NAME, JOINING_DATE, DATEDIFF(EXPIRING_DATE, JOINING_DATE) FROM USA_FAZZRO_COMPANY;

As we see in the above query, the SELECT statement retrieves all records of the FULL_NAME, JOINING_DATE columns from the USA_FAZZRO_COMPANY table.

In the DATEDIFF function, it calculates a difference between two dates from the EXPIRING_DATE and JOINING_DATE columns of the USA_FAZZRO_COMPANY table.

We hope that you have understood how to use the MariaDB DATEDIFF function on the DATE column of the USA_FAZZRO_COMPANY table. We have used an example and explained it in detail for better understanding.

Read: MariaDB Insert Into Select

MariaDB Difference between two dates and today

In this section, we will learn and understand how to use the MariaDB DATEDIFF and CURRENT_DATE functions on the DATE column for finding the difference between the two values in the table. And which will be explained with the help of an illustrated example.

In MariaDB, the CURRENT_DATE function extracts the current date value from the query. Here is an illustrated example of the MariaDB DATEDIFF and CURRENT_DATE functions on the DATE column for the result set by the following query:

EXAMPLE:

SELECT FULL_NAME, JOINING_DATE, DATEDIFF(EXPIRING_DATE, CURRENT_DATE) FROM USA_FAZZRO_COMPANY;

As we see in the above query, the SELECT statement will retrieve all records of the FULL_NAME and JOINING_DATE columns from the USA_FAZZRO_COMPANY table. In the DATEDIFF function, it will calculate the DATE difference between the EXPIRING_DATE and CURRENT_DATE columns from the USA_FAZZRO_COMPANY table.

In this section, you have understood how to use the MariaDB DATEDIFF and CURRENT_DATE function on the DATE column of the USA_FAZZRO_COMPANY table for the result set. We have used an example and explained it in detail for better understanding.

Read: MariaDB Insert Multiple Rows

MariaDB Difference Between Two Dates Between

In this section, we will learn and understand how to use the MariaDB DATEDIFF function with the BETWEEN condition on the DATE column of the table. And which will be explained with the help of an illustrated example.

The MariaDB BETWEEN condition retrieves records based on the SELECT statement. It is also used in the UPDATE, DELETE and INSERT statements.

Here is an illustrated example of the MariaDB DATEDIFF function with the BETWEEN condition on the DATE column of the table by the following query:

EXAMPLE:

SELECT FULL_NAME,JOINING_DATE, DATEDIFF(EXPIRING_DATE,CURRENT_DATE) FROM usa_fazzro_company
WHERE JOINING_DATE BETWEEN '2022-01-01 ' AND '2022-04-04 ' ;

In this preceding query, the SELECT statement will retrieve all records of the FULL_NAME and JOINING_DATE columns from the USA_FAZZRO_COMPANY table. In the DATEDIFF function, it is used to find the date difference between the EXPIRING_DATE and CURRENT_DATE columns from the USA_FAZZRO_COMPANY.

In the WHERE condition, the JOINING_DATE column is used with the BETWEEN condition to find all records between the 2022-01-01 and 2022-04-04 values from the USA_FAZZRO_COMPANY table. The SELECT statement will retrieve all records from the USA_FAZZRO_COMPANY table if the WHERE condition gets TRUE.

We hope that you have understood how to find the difference between two dates by using the DATEDIFF function on the DATE column of the USA_FAZZRO_COMPANY table. We have used an example and explained it in detail for better understanding.

Read: MariaDB Greatest Function

MariaDB Difference between two dates Date

In this section, we will learn and understand how to use the MariaDB DATEDIFF and DATE functions on the DATE column of the table for the result set. And which will be explained with the help of an illustrated example.

In MariaDB, the DATE function is used to extract the DATE value from the column_name or expression of the query.

Here is an illustrated example of the MariaDB DATEDIFF and DATE function on the DATE column by the following query:

EXAMPLE:

SELECT FULL_NAME,JOINING_DATE, DATEDIFF(EXPIRING_DATE,CURRENT_DATE) AS DIFFERNECE_TWO_DATES,
DATE(JOINING_DATE) FROM USA_FAZZRO_COMPANY ;

In this preceding query, the SELECT statement will retrieve all records of the FULL_NAME, and JOINING_DATE columns from the USA_FAZZRO_COMPANY table. In the DATEDIFF function, it is used to find the difference between two DATE values from the EXPIRING_DATE and CURRENT_DATE columns from the USA_FAZZRO_COMPANY table.

The DATE function, it’s used to extract the DATE value from the JOINING_DATE column from the USA_FAZZRO_COMPANY table.

We hope that you have understood the concept of the MariaDB DATEDIFF and DATE functions. And it’s used with the BETWEEN condition on the DATE column for the result set. We have used an example and explained it in detail for better understanding.

Read: MariaDB Insert If Not Exists

MariaDB Difference between two dates Day

In this section, we will learn and understand how to use the MariaDB DATEDIFF and DAY function on the DATE column of the table for the value. And which will be explained with the help of an illustrated example.

In MariaDB, the DAY function is used to extract the day portion value from the column_name or expression of the table. Let’s see a sample example of the MariaDB DATEDIFF and DAY function on the DATE column of the table for the value by the following query:

EXAMPLE:

SELECT FULL_NAME,JOINING_DATE, DATEDIFF(EXPIRING_DATE,JOINING_DATE) AS DIFFERENCE_TWO_DATES,
DAY(JOINING_DATE) FROM USA_FAZZRO_COMPANY;

In this preceding query, the SELECT statement is used to retrieve all records of the FULL_NAME and JOINING_DATE columns from the USA_FAZZRO_COMPANY table. The DATEDIFF function, it’s used to extract the DATE value by having the difference between the EXPIRING_DATE and JOINING_DATE columns of the USA_FAZZRO_COMPANY table.

To shorter the function_name, we have used an alias clause with the AS keyword and given the name as DIFFERENCE_TWO_DATES for the output column name. The DAY function, it’s used to extract the DATE value on the JOINING_DATE column from the USA_FAZZRO_COMPANY table.

Once all the function works, the SELECT statement will retrieve all records from the USA_FAZZRO_COMPANY table.

We hope you have understood how to use the MariaDB DATEDIFF and DAY functions on the date-type column of the table to find the difference in the DATE value. We have used an example and explained it in detail for better understanding.

Read: MariaDB Between + Examples

MariaDB Difference between two dates End Date

In this section, we will learn and understand how to use the MariaDB LAST_DAY and DATEDIFF function on the DATE column of the table and which will be explained with the help of an illustrated example.

In MariaDB, the LAST_DAY function is used to extract the last day of the month as a DATE value from the expression or column_name by the query.

Here is an illustrated example of the MariaDB LAST_DAY and DATEDIFF function on the DATE column to find the DATE value by the difference in the below following query:

EXAMPLE:

SELECT FULL_NAME,JOINING_DATE, DATEDIFF(EXPIRING_DATE,JOINING_DATE) AS DIFFERNECE_TWO_DATES,
LAST_DAY(JOINING_DATE) FROM usa_fazzro_company ;

In this preceding query, the SELECT statement is used to retrieve all records of the FULL_NAME and JOINING_DATE columns from the USA_FAZZRO_COMPANY table. The DATEDIFF function, it’s used to extract the DATE value by having the difference between the EXPIRING_DATE and JOINING_DATE columns of the USA_FAZZRO_COMPANY table.

To shorten the function_name, we used an alias clause with the AS keyword and named DIFFERENCE_TWO_DATES for the output column name. The LAST_DAY function will return the last day of the month from the JOINING_DATE column from the USA_FAZZRO_COMPANY table.

Once all the function works, the SELECT statement will retrieve all records from the USA_FAZZRO_COMPANY table.

We hope that you have understood how to use the MariaDB LAST_DAY and DATEDIFF functions on the DATE column of the table for the result set by the difference date value. We have used an example and explained it in detail for better understanding.

Read: MariaDB Drop Index

MariaDB Difference between two dates Group By

In this MariaDB tutorial, we will learn and understand how to use the MariaDB DATEDIFF function with the GROUP BY clause on the DATE column for the result set. And which will be explained with the help of an illustrated example.

The group by clause in MariaDB divides a result’s rows into categories. The aggregate functions count(), min(), max(), sum(), and avg() are frequently used with the group by function to obtain attributes of groups. For example, the number of elements (count), the total of values (sum), the maximum element (max), the minimum element (min), and the average of elements (avg).

Here is an example of the MariaDB DATEDIFF function used with the GROUP BY clause on the DATE column of the table by the following query:

EXAMPLE:

SELECT FULL_NAME,JOINING_DATE, DATEDIFF(EXPIRING_DATE,JOINING_DATE) AS DIFFERENCE_TWO_DATES
FROM USA_FAZZRO_COMPANY 
GROUP BY FULL_NAME;

As we see in the above query, the SELECT statement will retrieve all records of the FULL_NAME and JOINING_DATE columns from the USA_FAZZRO_COMPANY table.

In the DATEDIFF function, we will find the difference between the DATE value on the EXPIRING_DATE and JOINING_DATE columns from the USA_FAZZRO_COMPANY table. And we have grouped them by the FULL_NAME column by using the GROUP BY clause.

The SELECT statement will retrieve all records from the USA_FAZZRO_COMPANY table only when the function works for the result set.

We hope that you have understood how to use the MariaDB DATEDIFF function used with the GROUP BY clause on the DATE column for finding the DATE value by difference for the result set.

We have used an example and explained it in detail for better understanding.

Also, check: MariaDB Delete From Statement

MariaDB Difference between two dates Greater Than

In this section, we will learn and understand how to use the MariaDB DATEDIFF function with the GREATER THAN operator on the DATE column of the table and which will be explained with the help of an illustrated example.

In MariaDB, the GREATER THAN operator is used to find the greater value from the expression or column_name in the query. It is also part of the COMPARISON operator.

Let’s see an illustrated example of the MariaDB DATEDIFF function with the GREATER THAN operator on the DATE column to find the DATE value by the difference from the below following query:

EXAMPLE:

SELECT FULL_NAME,JOINING_DATE, DATEDIFF(EXPIRING_DATE,JOINING_DATE) AS DIFFERENCE_TWO_DATES
 FROM USA_FAZZRO_COMPANY 
WHERE JOINING_DATE > '2022-01-05 '; 

• As we see in the above query, the SELECT statement will retrieve all records of the FULL_NAME and JOINING_DATE columns from the USA_FAZZRO_COMPANY table.
• In the DATEDIFF function, we will find the difference between the DATE value on the EXPIRING_DATE and JOINING_DATE columns from the USA_FAZZRO_COMPANY table.
• In the WHERE condition, the JOINING_DATE column is used with the GREATER THAN operator to find a greater DATE value against the 2022-01-05 value from the USA_FAZZRO_COMPANY table.
• The SELECT statement will retrieve all records from the USA_FAZZRO_COMPANY table if the WHERE condition gets TRUE.

We hope that you have understood how to use the MariaDB DATEDIFF function with the GREATER THAN operator on the DATE column of the USA_FAZZRO_COMPANY table. And which is used to find the DATE value by the difference method.

We have used an example and explained it in detail for better understanding.

Read: MariaDB COUNT Function

MariaDB Difference between two dates having

In this section, we will learn and understand how to use the MariaDB DATEDIFF function with the HAVING clause in the DATA column of the table by the query. And which will be explained with the help of an illustrated example.

The MariaDB HAVING clause is used in conjunction with the GROUP BY clause to limit the returned rows to those that meet the condition. We will use an example of the MariaDB DATEDIFF function with the HAVING clause on the DATA column of the table by the following query:

EXAMPLE:

SELECT PATIENT_FIRSTNAME, PATIENT_LASTNAME, DATEDIFF(PATIENT_ADMITDATE,PATIENT_DISCHARGEDATE) FROM johns_hopkins_hospital
GROUP BY PATIENT_FIRSTNAME
HAVING MAX(PATIENT_ID) >=10 
LIMIT 10;

As we see in the above query, we have used the SELECT statement to retrieve the records of the PATIENT_FIRSTNAME and PATIENT_LASTNAME columns from the JOHNS_HOPKINS_HOSPITAL table.

In the DATEDIFF function, we have to find the difference in days value between the PATIENT_ADMITDATE and PATIENT_DISCHARGEDATE columns from the JOHNS_HOPKINS_HOSPITAL. For grouping the PATIENT_FIRSTNAME columns from the JOHNS_HOPKINS_HOSPITAL table we have used the GROUP BY clause.

In the HAVING condition, we have used the aggregate_function as the MAX function to find the max value in the PATIENT_ID column. And also we have used the GREATER THAN or EQUAL operator to find the value greater than or equal to 10 in the PATIENT_FIRSTNAME.

At the end of the query, we have used the LIMIT clause as LIMIT 10 to retrieve all records from the JOHNS_HOPKINS_HOSPITAL table.

We hope that you have understood how to use the DATEDIFF function used with the HAVING clause on the DATE column of the JOHNS_HOKINS_HOSPITAL table. This will help to find the day’s value with the MariaDB DATEDIFF function.

We have used an example and explained it in detail for better understanding.

Read: MariaDB JSON Data Type

MariaDB Difference between two dates hours

We will learn and understand how to use the MariaDB DATEDIFF and HOUR functions on the DATE column of the table. And which will be explained with the help of an illustrated example.

In MariaDB, the HOUR function is used to extract the hour portion value of the expression or column_name from the query. Here is an illustrated example of the MariaDB DATEDIFF and HOUR functions on the DATE column of the table by the following query:

EXAMPLE:

SELECT PATIENT_FIRSTNAME, PATIENT_LASTNAME, DATEDIFF(PATIENT_DISCHARGEDATE, PATIENT_ADMITDATE),
HOUR(PATIENT_ADMITDATE) FROM JOHNS_HOPKINS_HOSPITAL
LIMIT 5;

In this preceding query, the MariaDB SELECT statement is used to retrieve all records of the PATIENT_FIRSTNAME and PATIENT_LASTNAME from the JOHNS_HOPKINS_HOSPITAL table. The DATEDIFF function is used to find the difference in days value between the PATIENT_DISCHARGEDATE and PATIENT_ADMITDATE from the JOHNS_HOPKINS_HOSPITAL table.

The HOUR function, it’s used to find the hour portion value from the PATIENT_ADMITDATE columns. We have used the LIMIT clause as LIMIT 5 to retrieve the first 5 records from the JOHNS_HOPKINS_HOSPITAL table by using the SELECT statement.

We hope that you have understood the concept of the MariaDB DATEDIFF and HOUR function on the DATE column of the JOHNS_HOPKINS_HOSPITAL table for finding the difference in the DAY value.

We have used an example and explained it in detail for better understanding.

Read: MariaDB Rename Table

MariaDB Difference between two dates like

In this MariaDB tutorial, we will learn and understand how to use the MariaDB DATEDIFF function with the LIKE clause on the DATE column of the table. And which will be explained with the help of an illustrated example.

The LIKE operator is a logical operator in MariaDB that returns TRUE when any string matches the specific pattern provided with the LIKE operator. In other words, with the help of a like operator, we can test whether the string or expression matches the pattern.

If the string or expression matches with the pattern, then it returns TRUE otherwise FALSE. The pattern is used with the LIKE operator, and this pattern is called wildcards. Two wildcards are used with the like operator in MariaDB.

• Percent (%): It is called a percent wildcard that matches any string with any number of characters.
• Underscore(_): It is called an underscore wildcard that matches any single character.

Here is a sample example of the MariaDB DATEDIFF function used with the LIKE condition on the DATE column of the table by the following query:

EXAMPLE:

SELECT PATIENT_FIRSTNAME, PATIENT_LASTNAME, DATEDIFF(PATIENT_DISCHARGEDATE, PATIENT_ADMITDATE)
 FROM johns_hopkins_hospital
 WHERE PATIENT_FIRSTNAME LIKE '%a'
LIMIT 5;

In this preceding query, we have used the SELECT statement to retrieve all records of the PATIENT_FIRSTNAME and PATIENT_LASTNAME columns of the JOHNS_HOPKINS_HOSPITAL table.

In the DATEDIFF function, we have used to find the days value by the difference between the PATIENT_DISCHARGEDATE and PATIENT_ADMITDATE columns of the JOHNS_HOPKINS_HOSPITAL table.

In the WHERE condition, the PATIENT_FIRSTNAME is used with the LIKE condition to find the alphabet a value at the end of the PATIENT_FIRSTNAME columns of the table.

At the end of the query, we have used the LIMIT clause as LIMIT 5 to retrieve the first 10 records of the JOHNS_HOPKINS_HOSPITAL table by using the SELECT statement.

We hope you now understand how to determine the DAYS value by the difference using the MariaDB DATEDIFF function and the LIKE condition on the DATE column of the JOHNS_HOPKINS_HOSPITAL database.

For a better understanding, we used an example and explained it in depth.

Read: MariaDB ENUM – Helpful Guide

MariaDB Difference between two dates less than

We will learn and understand how to use MariaDB DATEDIFF function with the LESS THAN operator on the DATE column of the table. And which will be explained with the help of an illustrated example.

In MariaDB, the COMPARISON operator is used for testing equality or non-equality and also for the advanced operators. And it is used in the WHERE condition for which records are to be selected. The LESS THAN operator is also part of the COMPARISON operator.

Here is a sample example of the MariaDB DATEDIFF function used with the LESS THAN operator on the DATE column by the following query:

EXAMPLE:

SELECT PATIENT_FIRSTNAME, PATIENT_LASTNAME, DATEDIFF(PATIENT_DISCHARGEDATE, PATIENT_ADMITDATE)
 FROM johns_hopkins_hospital
 WHERE PATIENT_ID < 20;

As we see in the above quote, the SELECT statement will retrieve all records of the PATIENT_FIRSTNAME and PATIENT_LASTNAME columns of the JOHNS_HOPKINS_HOSPITAL table. In the DATEDIFF function, we have to find the DAYS value by the difference between the PATIENT_DISCHARGEDATE and PATIENT_ADMITDATE columns from the JOHNS_HOPKINS_HOSPITAL table.

In the WHERE condition, the PATIENT_ID column is used with the LESS THAN operator to find the values less than 20 from the JOHNS_HOPKINS_HOSPITAL table. We will use the SELECT statement to retrieve all records from the JOHNS_HOPKINS_HOSPITAL table if the WHERE condition gets TRUE.

But if the WHERE condition turns out FALSE as per the MariaDB query requirement then the SELECT statement will retrieve nothing in the output column from the JOHNS_HOPKINS_HOSPITAL table.

In this MariaDB tutorial, we hope that you have understood how to use the MariaDB DATEDIFF function used with the LESS THAN operator on the DATE column of the table. For better understanding, we have used an example and explained it in depth.

Read: MariaDB JSON Function

MariaDB Difference between two dates Max

We will learn and understand how to use the MariaDB DATEDIFF and MAX functions on the DATE column of the table. And which will be explained with the help of an illustrated example.

In MariaDB, the MAX function is used to extract the MAX value from the expression or column_name of the table by the query. As per the sub-topic, we have used the MAX function to extract the max value on the DATE column of the table.

Let’s see a sample example of the MariaDB DATEDIFF and MAX function on the DATE column of the table by the following query:

EXAMPLE:

SELECT PATIENT_FIRSTNAME, PATIENT_LASTNAME, DATEDIFF(PATIENT_DISCHARGEDATE, PATIENT_ADMITDATE) AS DATE_DIFFERENCE,
MAX(PATIENT_ADMITDATE) 
 FROM johns_hopkins_hospital;

In the above example query, we have used the SELECT statement to retrieve all records of the PATIENT_FIRSTNAME and PATIENT_LASTNAME columns of the JOHNS_HOPKINS_HOSPITAL table.

In the DATEDIFF function, we have used to find the DAYS value by the difference between the PATIENT_DISCHARGEDATE and PATIENT_ADMITDATE columns of the JOHNS_HOPKINS_HOSPITAL table.

To shorter the function_name, we have used the ALIAS clause with AS keyword and given the function name as DATE_DIFFERENCE for the output column_name. In the MAX function, we have used to extract the max value from the PATIENT_ADMITDATE column from the JOHNS_HAPKINS_HOSPITAL table.

We hope that you have understood how to use the MariaDB DATEDIFF and MAX functions on the DATE column of the table. For better understanding, we have used an example and explained it in depth.

Read: MariaDB If Null + Examples

MariaDB Difference between two dates Min

We will learn and understand how to use the MariaDB DATEDIFF and MIN functions on the DATE column of the table. And which will be explained with the help of an illustrated example.

In MariaDB, the MIN function is used to extract the min value of the expression or column_name from the query. As per the sub-topic, we have used the MIN function to extract the min value on the DATE column of the table.

Here is an example of the MariaDB DATEDIFF and MIN function on the DATE column of the table by the following query:

EXAMPLE:

SELECT PATIENT_FIRSTNAME, PATIENT_LASTNAME, DATEDIFF(PATIENT_DISCHARGEDATE, PATIENT_ADMITDATE) AS DATE_DIFFERENCE,
MIN(PATIENT_ADMITDATE) 
 FROM johns_hopkins_hospital;

• In the above example query, the SELECT statement is used to retrieve all records of the PATIENT_FIRSTNAME and PATIENT_LASTNAME columns of the JOHNS_HOPKINS_HOSPITAL table.
• In the DATEDIFF function, we have used to find the DAYS value by the difference between the PATIENT_DISCHARGEDATE and PATIENT_ADMITDATE columns of the JOHNS_HOPKINS_HOSPITAL table.
• To shorter the function_name, we have used the ALIAS clause with AS keyword and given the function name as DATE_DIFFERENCE for the output column_name.
• In the MIN function, we have used to extract the min value from the PATIENT_ADMITDATE column from the JOHNS_HAPKINS_HOSPITAL table.

Read: MariaDB Variables Tutorial

MariaDB Difference between two dates Today

We will learn and understand how to use the MariaDB DATEDIFF and CURRENT_DATE functions on the DATE column of the table. And which will be explained with the help of an illustrated example.

In MariaDB, the CURRENT_DATE function is used to give the current date and time. In the above subtopic, we will use the CURRENT_DATE function inside the DATEDIFF function of the table.

Here is a sample example of the MariaDB DATEDIFF and CURRENT_DATE function on the DATE column of the table by the following query:

EXAMPLE:

SELECT PATIENT_FIRSTNAME, PATIENT_LASTNAME, DATEDIFF(CURRENT_DATE, PATIENT_ADMITDATE) AS DATE_DIFFERENCE
FROM johns_hopkins_hospital
LIMIT 10;

As we see in the above query, the SELECT statement is used to retrieve all records of the PATIENT_FIRSTNAME and PATIENT_LASTNAME columns of the JOHNS_HOPKINS_HOSPITAL table.

In the DATEDIFF function, we will find the DAY value by the difference between the CURRENT_DATE function and the PATIENT_ADMITDATE column of the JOHNS_HOPKINS_HOSPITAL table.

To shorter the function_name, we have used the ALIAS clause with the AS keyword and given the name DATE_DIFFERENCE for the output column_name.

At the end of the query, the LIMIT clause is used as LIMIT 10 to retrieve the first 10 records of the JOHNS_HOPKINS_HOSPITAL table by using the SELECT statement.

In this MariaDB tutorial, we have learned how to use the MariaDB DATEDIFF and CURRENT_DATE function on the DATE column of the table for finding the DAY value by difference.

For better understanding, we have used an example and explained it in depth.

Read: MariaDB Foreign Key + Examples

MariaDB Difference between two dates Update

In this section, we will learn and understand how to use the MariaDB DATEDIFF function with the UPDATE statement on the DATE column of the table. And which is explained with the help of an illustrated example.

In MariaDB, the UPDATE statement is used to update existing records in the table. Here’s an example of the MariaDB UPDATE statement with the DATEDIFF function on the DATE column of the table by the following query:

EXAMPLE:

UPDATE USA_FAZZRO_COMPANY
SET ID= (SELECT DATEDIFF(EXPIRING_DATE,JOINING_DATE)
WHERE ID>=5);

SELECT * FROM USA_FAZZRO_COMPANY;

• As we see in the above query, the UPDATE statement is used to set the ID column with the subquery.
• In the INNER QUERY statement, we have used the SELECT statement on the DATEDIFF function based on the WHERE condition.
• In the DATEDIFF function, we have to find the date value by the difference between the EXPIRING_DATE and JOINING_DATE columns from the USA_FAZZRO_COMPANY table.
• In the WHERE condition, the ID column is used with the GREATER THAN or EQUAL operator to find the greater or equal value than 5.
• The SELECT statement will retrieve all records of the USA_FAZZRO_COMPANY table if the WHERE condition gets TRUE.

If we want to check if the UPDATE statement has been executed properly then we will use the SELECT statement to retrieve all records from the USA_FAZZRO_COMPANY table.

We hope that you have understood how to use the MariaDB UPDATE statement on the subtopic “MariaDB Difference Between Two Dates Update”. We have used an example and explained it in detail for better understanding.

Read: MariaDB Temporary Table + Examples

MariaDB Difference between two dates WeekDays

In this section, we will learn and understand how to use the MariaDB DATEDIFF and WEEKDAY function on the DATE column of the table. And which is explained with the help of an illustrated example.

In MariaDB, the WEEKDAY function is used to extract the index of weekdays. The index of weekdays are (0= MONDAY, 1=TUESDAY, 2=WEDNESDAY,3=THURSDAY, 4= FRIDAY, 5= SATURDAY, 6= SUNDAY) given as DATE value.

Here is an illustrated example of the MariaDB DATEDIFF and WEEKDAY function on the DATE column by the following query:

EXAMPLE:

SELECT PATIENT_FIRSTNAME, PATIENT_LASTNAME, DATEDIFF(PATIENT_DISCHARGEDATE, PATIENT_ADMITDATE) AS DATE_DIFFERENCE,
WEEKDAY(PATIENT_ADMITDATE) AS INDEX_OF_WEEKDAY
FROM johns_hopkins_hospital
LIMIT 10;

As we see in the above query, the SELECT statement is used to retrieve all records of the PATIENT_FIRSTNAME and PATIENT_LASTNAME columns from the JOHNS_HOPKINS_HOSPITAL table.

In the DATEDIFF function, we have used to find the DAY value by the difference method on the PATIENT_DISCHARGEDATE and PATIENT_ADMITDATE columns from the JOHNS_HOPKINS_HOSPITAL table.

In the WEEKDAY function, we will extract the index of weekdays on the PATIENT_ADMITDATE column from the JOHNS_HOPKINS_HOSPITAL table. To shorter the function_names, we have used an ALIAS clause with AS keyword and given the name DATE_DIFFERENCE and INDEX_OF_WEEKDAY for the DATEDIFF and WEEKDAY functions.

At the end of the query, we have used a LIMIT clause as LIMIT 10 to retrieve all records from the JOHNS_HOPKINS_HOSPITAL table by using the SELECT statement.

We hope that you have understood how to use the MariaDB DATEDIFF and WEEKDAY functions on the DATE columns of the JOHNS_HOPKINS_HOSPITAL table for the result set. For better understanding, we have used an example and explained it in detail.

Read: MariaDB Reset Root Password

MariaDB Difference between two dates Yesterday

In this MariaDB tutorial, we will learn and understand how to use the MariaDB DATEDIFF and CURRENT_DATE functions on the DATE columns of the table. And which will be explained with the help of an illustrated example.

EXAMPLE:

SELECT PATIENT_FIRSTNAME, PATIENT_LASTNAME, DATEDIFF(CURRENT_DATE -1, PATIENT_ADMITDATE) AS DATE_DIFFERENCE
FROM johns_hopkins_hospital
LIMIT 10;

As we see in the above query, the SELECT statement is used to retrieve all records of the PATIENT_FIRSTNAME and PATIENT_LASTNAME columns from the JOHNS_HOPKINS_HOSPITAL table.

The DATEDIFF function, it’s used to find the DAY value between the CURRENT_DATE and PATIENT_ADMITDATE columns. If we see today’s date as ‘2022-06-06’ but as per topic, we have to use yesterday’s date then we will just minus from the current_date for the DATEDIFF function.

To shorter the function_name, we have used the ALIAS clause with the AS keyword and given the name DATE_DIFFERENCE for the output column. We have used the LIMIT clause at the end of the query, as LIMIT 10 to retrieve the first 10 records of the JOHNS_HOPKINS_HOSPITAL table by using the SELECT statement.

We hope that you have understood the subtopic “MariaDB Difference Between Two Dates Yesterday” by using the DATEDIFF and CURRENT_DATE functions for the table. We have used an illustrated example and explained it in detail.

Read: MariaDB Truncate Table + Examples

MariaDB Difference between two dates Year

In this section, we will learn and understand how to use the MariaDB DATEDIFF and YEAR function on the DATE column of the table. And which will be explained with the help of an illustrated example.

In MariaDB, the YEAR function is used to extract the year portion value from the expression or column_name of the query. It will extract the year value in 4-digit as YYYY.

Here is an example of the MariaDB DATEDIFF and YEAR function on the DATE column of the table by the following query:

EXAMPLE:

SELECT PATIENT_FIRSTNAME, PATIENT_LASTNAME, DATEDIFF(PATIENT_DISCHARGEDATE, PATIENT_ADMITDATE) AS DATE_DIFFERENCE,
YEAR(PATIENT_ADMITDATE) AS YEAR_VALUE
FROM johns_hopkins_hospital
LIMIT 10;

In this preceding query, the SELECT statement will retrieve all records of the PATIENT_FIRSTNAME and PATIENT_LASTNAME columns from the JOHNS_HOPKINS_HOSPITAL table.

In the DATEDIFF function, it is used to find the DAY value by the difference between PATIENT_DISCHARGEDATE and PATIENT_ADMITDATE columns from the JOHNS_HOPKINS_HOSPITAL table.

The YEAR function, it’s used to extract the year portion value from the PATIENT_ADMITDATE columns from the JOHNS_HOPKINS_HOSPITAL table.

To shorter the function_name, we have used an ALIAS clause with the AS keyword and given the name DATE_DIFFERENCE and YEAR_VALUE for the output columns. At the end of the query, we have used the LIMIT clause as LIMIT 10 to retrieve all records from the JOHNS_HOPKINS_HOSPITAL table by using the SELECT statement.

We hope that you have understood how to use the MariaDB DATEDIFF and YEAR function on the DATE columns of the JOHNS_HOPKINS_HOSPITAL table for the result set. We have used an example and explained it in depth for better understanding.

Also, take a look at some more MariaDB tutorials.

• MariaDB ISNULL + Examples
• MariaDB Join with Examples
• MariaDB Regexp + Examples

We looked at how to use the MariaDB Difference Between two dates statement and looked at some instances in this MariaDB tutorial. There are several listings of the topics that are discussed:

• MariaDB Difference between two dates
• MariaDB Difference between two dates and today
• MariaDB Difference between two dates between
• MariaDB Difference between two dates Date
• MariaDB Difference between two dates Day
• MariaDB Difference between two dates End Date
• MariaDB Difference between two dates Group By
• MariaDB Difference between two dates Greater Than
• MariaDB Difference between two dates having
• MariaDB Difference between two dates hours
• MariaDB Difference between two dates like
• MariaDB Difference between two dates less than
• MariaDB Difference between two dates Max
• MariaDB Difference between two dates Min
• MariaDB Difference between two dates Today
• MariaDB Difference between two dates Update
• MariaDB Difference between two dates WeekDays
• MariaDB Difference between two dates Yesterday
• MariaDB Difference between two dates Year