To optimize SQL database performance, index primary keys, foreign keys, columns with frequent WHERE clauses, and high-cardinality columns, while avoiding low-cardinality columns (like boolean flags), frequently changing columns, large text columns, and small tables with only a few thousand rows, and never index every column indiscriminately.
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WHAT TO INDEX for 10x faster SQL #shorts #sql #efficiencyAdded:
Here is how to actually speed up your database queries. Focus on indexing.
What to index in SQL? Index primary keys, foreign keys, columns with frequent where clauses, columns with high cardinality. Don't index low cardinality columns like boolean flags, columns that change frequently, and large text columns. Doesn't make sense to index small tables when there are only couple of thousands of rows. And do not index every column just in case.
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