Results for “Signals & state”
Small, practical examples. Search by task or narrow things down below.
Deliver a result through a promise and future
C++: A promise sets a shared state and its future retrieves the value.
C++✓ Tested
Distinguish row count from non-null value count
SQL: COUNT(*) includes every row while COUNT(column) skips NULL values.
SQL✓ Tested
Distinguish row count from non-null value count
SQL Server: COUNT(*) includes every row while COUNT(column) skips NULL values.
SQL Server✓ Tested
Distinguish row count from non-null value count
Postgres: COUNT(*) includes every row while COUNT(column) skips NULL values.
Postgres✓ Tested
Distinguish row count from non-null value count
SQLite: COUNT(*) includes every row while COUNT(column) skips NULL values.
SQLite✓ Tested
Divide an ordered result into numbered buckets
SQL: NTILE distributes rows across buckets; include a unique tie-breaker for deterministic assignment.
SQL✓ Tested
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
Divide an ordered result into numbered buckets
Postgres: NTILE distributes rows across buckets; include a unique tie-breaker for deterministic assignment.
Postgres✓ Tested
Divide an ordered result into numbered buckets
SQLite: NTILE distributes rows across buckets; include a unique tie-breaker for deterministic assignment.
SQLite✓ Tested
Enable an init process for a service
Docker / Compose: init adds a small PID 1 process to forward signals and reap children.
Docker / Compose✓ Tested
Enforce a bounded numeric range
SQL: A named CHECK constraint keeps numeric values inside an inclusive interval.
SQL✓ Tested
Enforce a bounded numeric range
SQL Server: A named CHECK constraint keeps numeric values inside an inclusive interval.
SQL Server✓ Tested