MySQL Incorrect datetime value: '0000-00-00 00:00:00'

Question

I\'ve recently taken over an old project that was created 10 years ago. It uses MySQL 5.1.

Among other things, I need to change the default character set from latin1

Answer 1

I found the solution at https://support.plesk.com/hc/en-us/articles/115000666509-How-to-change-the-SQL-mode-in-MySQL. I had this:

mysql> show variables like 'sql_mode';
+---------------+-------------------------------------------------------------------------------------------------------------------------------------------+
| Variable_name | Value                                                                                                                                     |
+---------------+-------------------------------------------------------------------------------------------------------------------------------------------+
| sql_mode      | ONLY_FULL_GROUP_BY,STRICT_TRANS_TABLES,NO_ZERO_IN_DATE,NO_ZERO_DATE,ERROR_FOR_DIVISION_BY_ZERO,NO_AUTO_CREATE_USER,NO_ENGINE_SUBSTITUTION |
+---------------+-------------------------------------------------------------------------------------------------------------------------------------------+
1 row in set, 1 warning (0.01 sec)

Notice the NO_ZERO_IN_DATE,NO_ZERO_DATE in the results above. I removed that by doing this:

mysql> SET sql_mode = 'ONLY_FULL_GROUP_BY,STRICT_TRANS_TABLES,ERROR_FOR_DIVISION_BY_ZERO,NO_AUTO_CREATE_USER,NO_ENGINE_SUBSTITUTION';
Query OK, 0 rows affected, 1 warning (0.00 sec)

Then I had this:

mysql> show variables like 'sql_mode';
+---------------+--------------------------------------------------------------------------------------------------------------+
| Variable_name | Value                                                                                                        |
+---------------+--------------------------------------------------------------------------------------------------------------+
| sql_mode      | ONLY_FULL_GROUP_BY,STRICT_TRANS_TABLES,ERROR_FOR_DIVISION_BY_ZERO,NO_AUTO_CREATE_USER,NO_ENGINE_SUBSTITUTION |
+---------------+--------------------------------------------------------------------------------------------------------------+
1 row in set, 1 warning (0.01 sec)

After doing that, I could use ALTER TABLE successfully and alter my tables.