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0
6/10
research
An analysis of SQL order-equivalence in window functions across major database systems, examining whether identical ORDER BY clauses in window functions guarantee consistent row ordering for peer rows. The article reveals that while the SQL standard requires order-equivalent clauses to produce deterministic peer ordering, several database systems violate this guarantee, and proposes solutions for achieving consistent results.
sql
window-functions
order-by
row-number
database-behavior
sql-standard
non-determinism
query-optimization
peer-rows
cross-database-compatibility
BigQuery
Db2
DuckDB
H2
MariaDB
MySQL
Oracle DB
PostgreSQL
SQL Server
SQLite
Markus Winand