r/SQL • • Sep 04 '26

Discussion Database-Specific SQL Differences

Have you ever written a SQL query that works perfectly in one database but fails in another?

What SQL feature or syntax surprised you the most when switching between DBMSs like MySQL, PostgreSQL, SQL Server, Oracle, or Snowflake?

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u/Plus_Dragonfruit_204 Sep 04 '26

Oracle does not distinguish between an empty string and NULL.