How can I use 2-digit year value in MySQL DATEDIFF() function?

We can use 2-digit year value either in single date expression or in both date expressions used as argument/s in MySQL DATEDIFF() function.

For example, the query below is using 2-digit year value in first date expression and other is having 4-digit year value.

mysql> Select DATEDIFF('18-10-22','2017-10-22'); +-----------------------------------+ | DATEDIFF('18-10-22','2017-10-22') | +-----------------------------------+ |                               365 | +-----------------------------------+ 1 row in set (0.00 sec)

And the query below is using 2-digit year value in both date expressions.

mysql> Select DATEDIFF('18-10-22','17-10-22'); +---------------------------------+ | DATEDIFF('18-10-22','17-10-22') | +---------------------------------+ |                             365 | +---------------------------------+ 1 row in set (0.00 sec)