Question

I have one column date1 which is varchar type
I want this column to date type.
I tried changing field but all date is converted to 0000-00-00.
format is dd-mm-yyyy but in varchar.

How can I convert the same date format but with date format using sql queries or similar but at database level ?

Answer 1

UPDATE `table`
SET `column` = str_to_date( `column`, '%d-%m-%Y' );

More about STR_TO_DATE function.

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Since your column name is date1, you can replace column with date1 in the above syntax, and the code shall be:

UPDATE `table`
SET `date1` = str_to_date( `date1`, '%d-%m-%Y' );