Results for “array_agg”
Small, practical examples. Search by task or narrow things down below.
Track which union member is currently valid
C: An explicit tag tells callers which overlaid union value to read.
C✓ Tested
Transform each item in a collection
Build a result array with a foreach expression.
foreach✓ Tested
Use a fixed-size container with bounds checking
C++: std::array retains its element count and supports checked access through at.
C++✓ Tested
Use named states for a controller
Arduino / C: An enum makes state transitions easier to read than unexplained numbers.
Arduino / C✓ Tested
Attach an overall count to every row
SQL: An uncorrelated scalar subquery supplies the same aggregate to each output row.
SQL✓ Tested
Attach an overall count to every row
SQL Server: An uncorrelated scalar subquery supplies the same aggregate to each output row.
SQL Server✓ Tested
Attach an overall count to every row
Postgres: An uncorrelated scalar subquery supplies the same aggregate to each output row.
Postgres✓ Tested
Attach an overall count to every row
SQLite: An uncorrelated scalar subquery supplies the same aggregate to each output row.
SQLite✓ Tested
Build a query from several named stages
SQL: Separate row selection from aggregation using two common table expressions.
SQL✓ Tested
Build a query from several named stages
SQL Server: Separate row selection from aggregation using two common table expressions.
SQL Server✓ Tested
Build a query from several named stages
Postgres: Separate row selection from aggregation using two common table expressions.
Postgres✓ Tested
Build a query from several named stages
SQLite: Separate row selection from aggregation using two common table expressions.
SQLite✓ Tested