mySQL str_to_date() function returns error

Question

I keep receiving an error message when trying to convert a column, CreatedDate, of string date values in my Estimates table into the mySQL date format using str_to_date(). M

Answer 1

Disable NO_ZERO_DATE SQL mode:

set @old_sql_mode = @@sql_mode; 
set sql_mode = ''; 

Run your statement:

UPDATE Estimates
SET CreatedDate = NULLIF(str_to_date(CreatedDate, '%c/%e/%y'), FROM_DAYS(0))

Then enable original SQL modes:

set sql_mode = @old_sql_mode;

Disabling NO_ZERO_DATE mode will make STR_TO_DATE return zero date 0000-00-00 for invalid date strings, the same value is returned by FROM_DAYS(0). So NULLIF will convert zero dates to NULL.

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