How Can I Efficiently Query for Specific Tuples Using SQL's 'IN' Clause?

Leveraging Tuples in SQL "IN" Clause

Querying a table for specific tuples (pairs of values) using the "IN" clause requires careful consideration. While string concatenation may seem like a viable solution, it can be computationally expensive for large datasets. Fortunately, there's a more efficient approach using Standard SQL-92 syntax.

The proposed syntax with minor tweaks (("'"). replaced with (''). and (VALUES keyword added) is a valid Standard SQL-92 syntax:

SELECT *
FROM mytable
WHERE (group_id, group_type) IN 
(
  VALUES ('1234-567', 2),
         ('4321-765', 3),
         ('1111-222', 5)
);

However, it's important to note that SQL Server 2022 does not yet support this syntax, considering it an "unplanned" feature. Conversely, PostgreSQL and SQLite are among the SQL products that do support it.

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