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

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PostgresRelationships & missing data

Generate every combination of two sets

Postgres: CROSS JOIN creates one result per possible pair, so the output size is the product of the input sizes.

Postgres✓ Tested
SQLiteRelationships & missing data

Generate every combination of two sets

SQLite: CROSS JOIN creates one result per possible pair, so the output size is the product of the input sizes.

SQLite✓ Tested
SQLSubqueries & ranked selection

Include every row tied for the highest score

SQL: Compare with MAX rather than limiting to an arbitrary number of rows.

SQL✓ Tested
SQL ServerSubqueries & ranked selection

Include every row tied for the highest score

SQL Server: Compare with MAX rather than limiting to an arbitrary number of rows.

SQL Server✓ Tested
PostgresSubqueries & ranked selection

Include every row tied for the highest score

Postgres: Compare with MAX rather than limiting to an arbitrary number of rows.

Postgres✓ Tested
SQLiteSubqueries & ranked selection

Include every row tied for the highest score

SQLite: Compare with MAX rather than limiting to an arbitrary number of rows.

SQLite✓ Tested
Bash ScriptsDiagnostics & defensive scripting

Inspect every command status in a pipeline

Bash Scripts: Copy PIPESTATUS immediately before another command overwrites it.

Bash Scripts✓ Tested
PowerShellGetting Started

Process every array element

PowerShell: Process every array element using PowerShell 7.

PowerShell✓ Tested
Bash ScriptsVariables & text

Replace every occurrence in a string

Substitute text directly with Bash parameter expansion.

replace✓ Tested
Arduino / CBinary values & packets

Require every bit in a mask

Arduino / C: Masking followed by equality tests whether all required flags are set.

Arduino / C✓ Tested
PythonNumbers & calculations

Select the largest values without sorting everything

Python: Use heapq.nlargest when only a small prefix of the ranking is required.

Python✓ Tested
PythonGetting Started

Visit every item in a collection

Python: Print each element in the collection’s original order.

Python✓ Tested