How to remote duplicate values from a table to add a UNIQUE index, in MariaDB.
MariaDB
The most widely known query optimisation rule is that developers should always avoid SELECT *. Even when all ...
Some queries always fail or never return rows. They should be eliminated to improve database performance.
Comparisons are tricky when NULL values are involved. But some databases offer some special, handy syntax to solve the problem.
MariaDB 10.6 is now Generally Available! Let's see what's new and if it's worth an upgrade.
Ignored Index are a MariaDB 10.6 feature that allows us to drop an index in production reducing the risks.
Having many indexes in our databases comes with a cost. It is good to periodically eliminate duplicate and unused indexes.
MariaDB/MySQL replication filters may be useful, but they come with some risks that Database Administrators should be aware of.
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