Results for “Context & shared state”
Small, practical examples. Search by task or narrow things down below.
Expose a reusable filtered view
SQLite: A view stores a query definition rather than a snapshot of its rows.
SQLite✓ Tested
Filter aggregate groups
Keep only categories with multiple products.
HAVING✓ Tested
Filter rows before grouping
SQL: WHERE limits the rows contributing to the aggregate; it differs from filtering completed groups with HAVING.
SQL✓ Tested
Filter rows before grouping
SQL Server: WHERE limits the rows contributing to the aggregate; it differs from filtering completed groups with HAVING.
SQL Server✓ Tested
Filter rows before grouping
Postgres: WHERE limits the rows contributing to the aggregate; it differs from filtering completed groups with HAVING.
Postgres✓ Tested
Filter rows before grouping
SQLite: WHERE limits the rows contributing to the aggregate; it differs from filtering completed groups with HAVING.
SQLite✓ Tested
Filter rows with WHERE
Keep products below a chosen price.
WHERE✓ Tested
Find parents whose every child meets a rule
SQL: Combine existence with the absence of a violating child to exclude parents with no children.
SQL✓ Tested
Find parents whose every child meets a rule
SQL Server: Combine existence with the absence of a violating child to exclude parents with no children.
SQL Server✓ Tested
Find parents whose every child meets a rule
Postgres: Combine existence with the absence of a violating child to exclude parents with no children.
Postgres✓ Tested
Find parents whose every child meets a rule
SQLite: Combine existence with the absence of a violating child to exclude parents with no children.
SQLite✓ Tested
Find parents with at least two child rows
SQL: Use a correlated count when testing a per-parent threshold.
SQL✓ Tested