Results for “#table”
Small, practical examples. Search by task or narrow things down below.
Keep a dollar sign literal
PowerShell: Keep a dollar sign literal using PowerShell 7.
PowerShell✓ Tested
Keep children while clearing a deleted relationship
SQL: ON DELETE SET NULL requires a nullable foreign-key column.
SQL✓ Tested
Keep function-local assignments separate from caller state
PowerShell: Ordinary function assignments create local variables rather than replacing the caller’s variable.
PowerShell✓ Tested
Keep parent rows while filtering joined children
SQL: Put a child filter in ON when unmatched parents must remain in the result.
SQL✓ Tested
Keep rows matching a condition
SQL: Use WHERE to select rows with a particular category.
SQL✓ Tested
Keep unmatched rows with LEFT JOIN
Show every product even when stock is missing.
LEFT JOIN✓ Tested
Label rows with CASE
Derive a readable label from a condition.
CASE✓ Tested
List distinct values
Remove duplicate category values from a result.
DISTINCT✓ Tested
List files by extension
Enumerate regular files and return their names in order.
Get-ChildItem✓ Tested
List unordered pairs without duplicate reversals
SQL: Join using an increasing key comparison to omit self-pairs and reversed duplicates.
SQL✓ Tested
Look up values in an associative array
Use named keys for a small in-memory configuration table.
dictionary✓ Tested
Make a pair of columns unique together
SQL: A composite primary key permits repeated individual values while forbidding a duplicate combination.
SQL✓ Tested