case … when …, … (comma-separated)

Apache DerbyBigQueryDb2 (LUW)H2MariaDBMySQLOracle DBPostgreSQLSQL ServerSQLite20132015201720192021⊘ 3.5.7 - 3.43.0⊘ 2008R2 - 2022⊘ 8.3 - 16⊘ 11gR1 - 21c⊘ 5.0 - 8.0.34⊘ 5.1 - 10.11✓ 2.0.202 - 2.2.220⊘ 1.4.191 - 1.4.200⊘ 9.7 - 11.5.8⊘ 2.0✓ -

The simple form of case allows one expression in the when clause. With the comma-separated form, it accepts a list of expressions.

SELECT CASE <Expression> WHEN 0, 1, 2 THEN 'good'
                         WHEN 3, 7, 9 THEN 'bad'
  FROM …

Normative References

The comma-separated case expression is defined in ISO/IEC 9075-2:2023 as optional feature F263, “Comma-separated predicates in simple CASE expression”.

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