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Small, practical examples. Search by task or narrow things down below.

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SQLGetting Started

Add values across several rows

SQL: Use SUM to calculate a total quantity.

SQL✓ Tested
SQL ServerGetting Started

Add values across several rows

SQL Server: Use SUM to calculate a total quantity.

SQL Server✓ Tested
PostgresGetting Started

Add values across several rows

Postgres: Use SUM to calculate a total quantity.

Postgres✓ Tested
SQLiteGetting Started

Add values across several rows

SQLite: Use SUM to calculate a total quantity.

SQLite✓ Tested
CSSInteraction selectors

Alternate row backgrounds with a structural selector

CSS: Nth-child counts sibling positions starting at one.

CSS✓ Tested
SQLSubqueries & ranked selection

Attach an overall count to every row

SQL: An uncorrelated scalar subquery supplies the same aggregate to each output row.

SQL✓ Tested
SQL ServerSubqueries & ranked selection

Attach an overall count to every row

SQL Server: An uncorrelated scalar subquery supplies the same aggregate to each output row.

SQL Server✓ Tested
PostgresSubqueries & ranked selection

Attach an overall count to every row

Postgres: An uncorrelated scalar subquery supplies the same aggregate to each output row.

Postgres✓ Tested
SQLiteSubqueries & ranked selection

Attach an overall count to every row

SQLite: An uncorrelated scalar subquery supplies the same aggregate to each output row.

SQLite✓ Tested
AngularLists & control flow

Bind a narrowed value using an @if alias

Bind a narrowed value using an @if alias with a standalone Angular component and explicit browser behavior.

Angular✓ Tested
RustThreads & shared ownership

Borrow local data in a scoped thread

Borrow local data in a scoped thread in a complete Rust program using the standard library.

Rust✓ Tested
RustTesting & reusable patterns

Borrow text until a modification is needed

Borrow text until a modification is needed in a complete Rust program using the standard library.

Rust✓ Tested