![]() ![]() Here’s an example of using DATEDIFF() in a database query. When used with datetime values, only the date part is used to compare the dates. Both functions return the difference between two dates and/or times, but the result is different between the two functions. If we swap those two arguments around, we get the following: SELECT DATEDIFF('', '') AS 'Result' MySQL DATEDIFF () vs TIMESTAMPDIFF (): What’s the Difference Posted on Jby Ian This article looks at the difference between two MySQL functions DATEDIFF () and TIMESTAMPDIFF (). You can use an earlier date for the first argument and it will return a negative value. The first date doesn’t have to be a later date than the second date. DATEDIFF () function in MySQL is used to return the number of days between two specified date values. Example 2 – Comparison with an Earlier Date In this case we get a positive return value. In this example, the first date is later than the second date. Where expr1 is the first date, and expr2 is the second date. The way it works is, you provide two arguments (one for each date), and DATEDIFF() will return the number of days between the two dates.įirst, here’s the syntax: DATEDIFF(expr1,expr2) The MySQL datediff function’s syntax is pretty simple: datediff (expression1,expression2) Note: expression1 is the first date, and expression2 is the second date. Syntax DATEDIFF (datepart, date1, date2) Parameters datepart - This is the datepart to get the difference between the two dates. This function returns the count (as a signed integer value) of the specified datepart boundaries crossed between the specified startdate and enddate. ![]() In this tutorial, you have learned how to use MySQL DATEDIFF function to calculate the number of days between two date values.In MySQL, you can use the DATEDIFF() function to find the difference between two dates. The DATEDIFF function returns the difference between two dates according to the datepart specified: such as year, day, month, etc. Note that the ROUND function is used to round the results. WHERE status = 'In Process' Code language: SQL (Structured Query Language) ( sql ) ![]() ROUND( DATEDIFF(requiredDate, orderDate) / 30, 2) ROUND( DATEDIFF(requiredDate, orderDate) / 7, 2), WHERE status = 'In Process' ORDER BY remaining_days Code language: SQL (Structured Query Language) ( sql )įor calculating an interval in week or month, you can divide the returned value of the DATEDIFF function by 7 or 30 as the following query: SELECT The following statement gets all orders whose statuses are in-process and calculates the number of days between ordered date and required date: SELECTĭATEDIFF(requiredDate, orderDate) remaining_days ORDER BY daysLeft DESC Code language: SQL (Structured Query Language) ( sql ) To calculate the number of days between the required date and shipped date of the orders, you use the DATEDIFF function as follows: SELECTĭATEDIFF(requiredDate, shippedDate) daysLeft See the following orders table in the sample database. ![]() Try It Out SELECT DATEDIFF( '', '') -9 days Code language: SQL (Structured Query Language) ( sql ) Try It Out SELECT DATEDIFF( '', '') - 9 days Code language: SQL (Structured Query Language) ( sql ) SELECT DATEDIFF( '', '') - 0 day Code language: SQL (Structured Query Language) ( sql ) Let’s take a look at some examples of using the DATEDIFF function. The DATEDIFF function is useful in many cases e.g., you can calculate an interval in days that the products need to ship to a customer. If you pass DATETIME or TIMESTAMP values, the DATEDIFF function only takes the date parts for calculation and ignores the time parts. The difference between startdate and enddate is expressed in. The DATEDIFF function accepts two arguments that can be any valid date or date-time values. To count the difference between dates in MySQL, use the DATEDIFF(enddate, startdate) function. The syntax of the MySQL DATEDIFF function is as follows: DATEDIFF(date_expression_1,date_expression_2) Code language: SQL (Structured Query Language) ( sql ) The MySQL DATEDIFF function calculates the number of days between two DATE, DATETIME, or TIMESTAMP values. Summary: in this tutorial, you will learn how to use the MySQL DATEDIFF function to calculate the number of days between two date values. ![]()
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