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SQLReporting & grouped calculations

Distinguish row count from non-null value count

SQL: COUNT(*) includes every row while COUNT(column) skips NULL values.

SQL✓ Tested
SQL ServerReporting & grouped calculations

Distinguish row count from non-null value count

SQL Server: COUNT(*) includes every row while COUNT(column) skips NULL values.

SQL Server✓ Tested
PostgresReporting & grouped calculations

Distinguish row count from non-null value count

Postgres: COUNT(*) includes every row while COUNT(column) skips NULL values.

Postgres✓ Tested
SQLiteReporting & grouped calculations

Distinguish row count from non-null value count

SQLite: COUNT(*) includes every row while COUNT(column) skips NULL values.

SQLite✓ Tested
Bash ScriptsParameter expansion

Distinguish unset variables from empty strings

Bash Scripts: Omitting the colon tests only whether a variable is unset; including it also treats an empty value as missing.

Bash Scripts✓ Tested
SQLWindow analytics

Divide an ordered result into numbered buckets

SQL: NTILE distributes rows across buckets; include a unique tie-breaker for deterministic assignment.

SQL✓ Tested
SQL ServerWindow analytics

Divide an ordered result into numbered buckets

SQL Server: NTILE distributes rows across buckets; include a unique tie-breaker for deterministic assignment.

SQL Server✓ Tested
PostgresWindow analytics

Divide an ordered result into numbered buckets

Postgres: NTILE distributes rows across buckets; include a unique tie-breaker for deterministic assignment.

Postgres✓ Tested
SQLiteWindow analytics

Divide an ordered result into numbered buckets

SQLite: NTILE distributes rows across buckets; include a unique tie-breaker for deterministic assignment.

SQLite✓ Tested
SQLConstraints & defaults

Enforce a bounded numeric range

SQL: A named CHECK constraint keeps numeric values inside an inclusive interval.

SQL✓ Tested
SQL ServerConstraints & defaults

Enforce a bounded numeric range

SQL Server: A named CHECK constraint keeps numeric values inside an inclusive interval.

SQL Server✓ Tested
PostgresConstraints & defaults

Enforce a bounded numeric range

Postgres: A named CHECK constraint keeps numeric values inside an inclusive interval.

Postgres✓ Tested