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SQLiteConstraints & defaults

Require a value with NOT NULL

SQLite: Declare required fields at the database boundary, not only in application validation.

SQLite✓ Tested
SQLGetting Started

Require two filtering conditions

SQL: Combine category and quantity conditions with AND.

SQL✓ Tested
SQL ServerGetting Started

Require two filtering conditions

SQL Server: Combine category and quantity conditions with AND.

SQL Server✓ Tested
PostgresGetting Started

Require two filtering conditions

Postgres: Combine category and quantity conditions with AND.

Postgres✓ Tested
SQLiteGetting Started

Require two filtering conditions

SQLite: Combine category and quantity conditions with AND.

SQLite✓ Tested
GitMerging & replaying changes

Resolve a merge by writing the intended final file

Git: After a conflict, edit the result, stage it, and finish the merge commit.

Git✓ Tested
jQueryGetting Started

Respond to a button click

jQuery: Learn how to respond to a button click in a complete browser example.

jQuery✓ Tested
jQueryEvent control

Respond to the Enter key

jQuery: Use the event key rather than deprecated numeric key codes.

jQuery✓ Tested
jQueryGetting Started

Respond when a select value changes

jQuery: Learn how to respond when a select value changes in a complete browser example.

jQuery✓ Tested
jQueryGetting Started

Respond while a user types

jQuery: Learn how to respond while a user types in a complete browser example.

jQuery✓ Tested
jQueryForm serialization & state

Restore a form’s original default values

jQuery: Call the native reset method through the underlying form element.

jQuery✓ Tested
SQLSubqueries & ranked selection

Return all rows tied for the maximum in a group

SQL: An equality comparison with a grouped maximum retains ties rather than choosing one arbitrary row.

SQL✓ Tested