over(… rows between …)

Apache DerbyBigQueryDb2 (LUW)H2MariaDBMySQLOracle DBPostgreSQLSQL ServerSQLite20072009201120132015201720192021✓ 3.25.0 - 3.43.0⊘ 3.5.7 - 3.23.1✓ 2012 - 2022⊘ 2008R2✓ 9.0 - 16⚠ 8.4⊘ 8.3✓ 11gR1 - 21c✓ 8.0.33 - 8.0.34⚠ 8.0.32✓ 8.0.11 - 8.0.31⊘ 5.0 - 5.7✓ 10.2 - 10.11⊘ 5.1 - 10.1✓ 1.4.198 - 2.2.220⊘ 1.4.191 - 1.4.197✓ 9.7 - 11.5.8✓ 2.0⊘ -

The over accepts rows framing, which limits the scope of the window functions to the rows between the specified range of rows relative to the current row.

                                  AND CURRENT ROW)
  FROM …

Returns an additional column with row count of the rows between the beginning of the result set and the current row—like row_number().

Meaningful framing requires an order by clause in over as well. Note that this order by clause does not necessarily affect the order of rows in the final result. If you want the result in a specific order, add an order by clause at the outermost query level.

Normative References

The over clause, including rows between, is defined in ISO/IEC 9075-2:2023 as part of optional feature T611, “Elementary OLAP operations”.

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