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SQLSubqueries & ranked selection

Attach an overall count to every row

SQL: An uncorrelated scalar subquery supplies the same aggregate to each output row.

SQL✓ Tested
SQL ServerSubqueries & ranked selection

Attach an overall count to every row

SQL Server: An uncorrelated scalar subquery supplies the same aggregate to each output row.

SQL Server✓ Tested
PostgresSubqueries & ranked selection

Attach an overall count to every row

Postgres: An uncorrelated scalar subquery supplies the same aggregate to each output row.

Postgres✓ Tested
SQLiteSubqueries & ranked selection

Attach an overall count to every row

SQLite: An uncorrelated scalar subquery supplies the same aggregate to each output row.

SQLite✓ Tested
SQLConstraints & defaults

Block deletion of a referenced parent

SQL: The default foreign-key action prevents deletion while a child still refers to the parent.

SQL✓ Tested
SQL ServerConstraints & defaults

Block deletion of a referenced parent

SQL Server: The default foreign-key action prevents deletion while a child still refers to the parent.

SQL Server✓ Tested
PostgresConstraints & defaults

Block deletion of a referenced parent

Postgres: The default foreign-key action prevents deletion while a child still refers to the parent.

Postgres✓ Tested
SQLiteConstraints & defaults

Block deletion of a referenced parent

SQLite: The default foreign-key action prevents deletion while a child still refers to the parent.

SQLite✓ Tested
SQLSubqueries & ranked selection

Build a query from several named stages

SQL: Separate row selection from aggregation using two common table expressions.

SQL✓ Tested
SQL ServerSubqueries & ranked selection

Build a query from several named stages

SQL Server: Separate row selection from aggregation using two common table expressions.

SQL Server✓ Tested
PostgresSubqueries & ranked selection

Build a query from several named stages

Postgres: Separate row selection from aggregation using two common table expressions.

Postgres✓ Tested
SQLiteSubqueries & ranked selection

Build a query from several named stages

SQLite: Separate row selection from aggregation using two common table expressions.

SQLite✓ Tested