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SQL ServerGetting Started

Remove duplicate result values

SQL Server: Use DISTINCT when repeated category values are not useful.

SQL Server✓ Tested
PostgresGetting Started

Remove duplicate result values

Postgres: Use DISTINCT when repeated category values are not useful.

Postgres✓ Tested
SQLiteGetting Started

Remove duplicate result values

SQLite: Use DISTINCT when repeated category values are not useful.

SQLite✓ Tested
GitRestoring & revising local work

Remove only a named untracked scratch file

Git: Use a narrow pathspec after reviewing the dry run; clean cannot recover untracked content.

Git✓ Tested
PowerShellFile operations & integrity

Rename a file in its current directory

PowerShell: Rename-Item changes the name without moving the item to another directory.

PowerShell✓ Tested
Bash ScriptsFiles & reliability

Replace a text file with an atomic rename

Prepare new content beside the target before renaming it into place.

atomic write✓ Tested
Bash ScriptsVariables & text

Replace every occurrence in a string

Substitute text directly with Bash parameter expansion.

replace✓ Tested
SQLExpressions & aggregates

Replace NULL in a result

Choose a fallback for a missing value.

COALESCE✓ Tested
GitMerging & replaying changes

Replay an unpublished branch on a newer base

Git: Rebase updates the base of local feature commits when their changes do not conflict.

Git✓ Tested
jQueryDeferred work & queues

Report progress before completion

jQuery: notify calls registered progress handlers while the deferred is pending.

jQuery✓ Tested
GitRestoring & revising local work

Restore a file’s content from an older commit

Git: Specify a source revision when the desired contents are not in the current index.

Git✓ Tested
PowerShellCommands & execution context

Restore an environment value after temporary use

PowerShell: Use finally so temporary process configuration does not leak to subsequent work; remove the entry when it was originally absent.

PowerShell✓ Tested