How Can I Efficiently Use Tuples in SQL's 'IN' Clause with Hard-Coded Values?

Using Tuples in SQL "IN" Clause with Hard-Coded Values

In SQL, the "IN" clause allows you to check if a column's value matches any value in a specified list. However, challenges arise when working with tuples and hard-coded values.

Alternative to String Concatenation

One proposed solution involved string concatenation, but its inefficiency for large tables raises concerns.

Valid Standard SQL-92 Syntax

A more efficient approach lies in utilizing a minor syntax tweak in Standard SQL-92 syntax:

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

This syntax is valid in many popular SQL products, including PostgreSQL and SQLite. However, SQL Server 2022 currently does not support it.

Conclusion

By replacing double quotes with single and adding the VALUES keyword, you can leverage a more efficient syntax for querying tuples with hard-coded values in the SQL "IN" clause. This approach addresses the drawbacks of string concatenation and provides a more scalable solution for large tables.

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