REDSHIFT ILIKE MOD

❌ Don't join the same table multiple times in the same query If the column you set as your dist key has a lot of NULL values, then all the NULLS will end up on one slice. ❌ Don't assign a column with NULL values as a Dist key Redshift works faster the fewer columns are pulled in.

HOWEVER, for everything else you should never be doing select * from unless you absolutely NEED every column. Redshift has a dedicated resource stream for handling small queries, so this rule doesn't apply to you if you are just wanting to do a quick select * from table where limit 50 as your query will be given its own resources.

❌ Don't select * unless it's a small query

REDSHIFT ILIKE MOD

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Redshift ilike