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This article introduces how to explain the meaning of sql_mode in MySQL 5.7. The content is very detailed. Interested friends can use it for reference. I hope it will be helpful to you.

Sql_mode is more stringent in MySQL version 5.7. Explain the meaning of each mode:

ONLY_FULL_GROUP_BY do not let queries in the GROUP BY section point to unselected columns

STRICT_TRANS_TABLES enables strict mode for the transactional storage engine and may also enable strict mode for the non-transactional storage engine

NO_ZERO_IN_DATE is in strict mode and does not accept dates where the month or day is partially zero.

NO_ZERO_DATE is in strict mode and does not use '0000-00' as a legal date

ERROR_FOR_DIVISION_BY_ZERO in strict mode, in the INSERT or UPDATE process, if divided by zero (or MOD (XP0)), an error is generated

NO_AUTO_CREATE_USER prevents GRANT from automatically creating new users unless a password is also specified

NO_ENGINE_SUBSTITUTION prevents automatic replacement of the storage engine if the required storage engine is disabled or uncompiled

Note: in a master-slave environment, in order to ensure the consistency of data, you must set the same master-slave sql_mode and ensure the consistency of sql_mode during data migration, otherwise replication and migration will fail due to the above restrictions, so use standard SQL syntax as much as possible.

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