Merge pull request magento-commerce/devdocs#2289 from magento-devdocs/MC-42252-mysql-guidelines

Add strict SQL mode guideline

Author: jeff-matthews

src/guides/v2.3/install-gde/prereq/mysql.md

@@ -13,6 +13,7 @@ Magento _strongly_ recommends you observe the following standard when you set up
 
 *  Magento uses [MySQL database triggers](http://dev.mysql.com/doc/refman/5.0/en/triggers.html){:target="_blank"} to improve database access during reindexing. These get created when the indexer mode is set to [schedule](https://devdocs.magento.com/guides/v2.3/config-guide/cli/config-cli-subcommands-index.html#configure-indexers-1){:target="_blank"}. Magento does not support any custom triggers in the Magento database because custom triggers can introduce incompatibilities with future Magento versions.
 *  Familiarize yourself with [these potential MySQL trigger limitations](http://dev.mysql.com/doc/mysql-reslimits-excerpt/5.1/en/stored-program-restrictions.html){:target="_blank"} before you continue.
+*  To enhance your database security posture, enable the [`STRICT_ALL_TABLES`](https://dev.mysql.com/doc/refman/5.7/en/sql-mode.html#sqlmode_strict_all_tables) SQL mode to prevent storing invalid data values, which might cause unwanted database interactions.
 *  If you use MySQL database replication, be aware that Magento does _not_ support MySQL statement-based replication. Make sure you use _only_ [row-based replication](http://dev.mysql.com/doc/refman/5.1/en/replication-formats.html){:target="_blank"}.
 
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src/guides/v2.4/install-gde/prereq/mysql.md

@@ -10,6 +10,7 @@ Magento _strongly_ recommends you observe the following standard when you set up
 
 *  Magento uses [MySQL database triggers](https://dev.mysql.com/doc/refman/8.0/en/triggers.html){:target="_blank"} to improve database access during reindexing. These get created when the indexer mode is set to [schedule]({{page.baseurl}}/config-guide/cli/config-cli-subcommands-index.html#configure-indexers-1){:target="_blank"}. Magento does not support any custom triggers in the Magento database because custom triggers can introduce incompatibilities with future Magento versions.
 *  Familiarize yourself with [these potential MySQL trigger limitations](https://dev.mysql.com/doc/mysql-reslimits-excerpt/8.0/en/stored-program-restrictions.html){:target="_blank"} before you continue.
+*  To enhance your database security posture, enable the [`STRICT_ALL_TABLES`](https://dev.mysql.com/doc/refman/5.7/en/sql-mode.html#sqlmode_strict_all_tables) SQL mode to prevent storing invalid data values, which might cause unwanted database interactions.
 *  If you use MySQL database replication, be aware that Magento does _not_ support MySQL statement-based replication. Make sure you use _only_ [row-based replication](https://dev.mysql.com/doc/refman/8.0/en/replication-formats.htmll){:target="_blank"}.
 
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