Results for “missing rows”
Small, practical examples. Search by task or narrow things down below.
Include missing values in a not-equal filter
SQLite: Ordinary inequality does not include NULL; explicitly include it when that is the intended rule.
SQLite✓ Tested
Include zero counts for missing relationships
SQL: Count the non-null child key after a left join so a missing relationship produces zero.
SQL✓ Tested
Include zero counts for missing relationships
SQL Server: Count the non-null child key after a left join so a missing relationship produces zero.
SQL Server✓ Tested
Include zero counts for missing relationships
Postgres: Count the non-null child key after a left join so a missing relationship produces zero.
Postgres✓ Tested
Include zero counts for missing relationships
SQLite: Count the non-null child key after a left join so a missing relationship produces zero.
SQLite✓ Tested
Place missing values after known values portably
SQL: A CASE sort key controls NULL placement without relying on engine-specific defaults.
SQL✓ Tested
Place missing values after known values portably
SQL Server: A CASE sort key controls NULL placement without relying on engine-specific defaults.
SQL Server✓ Tested
Place missing values after known values portably
Postgres: A CASE sort key controls NULL placement without relying on engine-specific defaults.
Postgres✓ Tested
Place missing values after known values portably
SQLite: A CASE sort key controls NULL placement without relying on engine-specific defaults.
SQLite✓ Tested
Test missing values with IS NULL
Find rows where an optional value is absent.
IS NULL✓ Tested
Treat an empty trimmed value as missing
SQL: NULLIF converts an empty string to NULL before a fallback is applied.
SQL✓ Tested
Treat an empty trimmed value as missing
SQL Server: NULLIF converts an empty string to NULL before a fallback is applied.
SQL Server✓ Tested