This function is used to convert a date into a string based on the format specified by format.

date_format(string date, string format)

**Table 1** Parameters
Parameter	Mandatory	Type	Description
date	Yes	DATE or STRING	Date to be converted The following formats are supported: yyyy-mm-dd yyyy-mm-dd hh:mi:ss yyyy-mm-dd hh:mi:ss.ff3
format	Yes	STRING	Format, based on which the date is converted The value is a combination of the time unit (year, month, day, hour, minute, and second) and any character. yyyy indicates the year. MM indicates the month. dd indicates the day. HH indicates the 24-hour clock. hh indicates the 12-hour clock. mm indicates the minute. ss indicates the second.

The return value is of the STRING type.

If the value of date is not of the DATE or STRING type, the error message "data type mismatch" is displayed.
If the value of date is of the DATE or STRING type but is not in one of the supported formats, NULL is returned.
If the value of date is NULL, NULL is returned.
If the value of format is NULL, NULL is returned.

The value 2023-08-14 is returned.

select date_format('2023-08-14','yyyy-MM-dd');

The value 2023-08 is returned.

select date_format('2023-08-14','yyyy-MM')

The value 20230814 is returned.

select date_format('2023-08-14','yyyyMMdd')