date functions

The MySQL TIMESTAMPDIFF() function is used to find the difference between two date or datetime expressions. You need to pass in the two date/datetime values, as well as the unit to use in determining the difference (e.g., day, month, etc). The TIMESTAMPDIFF() function will then return the difference in the specified unit.

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In MySQL, the TIMESTAMPADD() function allows you to add a specified amount of time to a date or datetime value. You specify the unit to add, as well as how many of that unit to add. It accepts three arguments, which are used for the initial value, the amount to add, and the unit to use.

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In MySQL, the TIMESTAMP() function returns a datetime value based on the argument/s passed in. You can provide one argument or two. If you provide two, it adds the second one to the first and returns the result.

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You might have noticed that MySQL has a TIMEDIFF() function and a SUBTIME() function. And you may have noticed that in many cases, they both return the same result. So you may be wondering what the difference is between these two functions?

Let’s find out.

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The MySQL TIMEDIFF() function returns the difference between two time or datetime values.

The way it works is, you provide the two values to compare, and TIMEDIFF() subtracts the second value from the first, then returns the result as a time value.

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When working with MySQL, you can use the TIME() function to extract the time part from a time or datetime value.

The way it works is, you pass the time/datetime expression in as an argument, and TIME() will return the time part.

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In MySQL, you can use the SUBTIME() function to subtract a time value from a time or datetime expression.

The way it works is, you provide two arguments; the first is a time or datetime value, and the second is a time value. The SUBTIME() function then subtracts the second argument from the first one and returns the result.

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In MySQL, the QUARTER() function returns the quarter of the year of a given date.

This function accepts one argument – the date to extract the quarter from.

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