Manual:GenerateSchemaSql.php

Details
This maintenance script build SQL files from abstract JSON files. The feature to generate SQL files from abstract JSON file was introduced in MediaWiki 1.35 by RFC: T191231. MediaWiki is using Doctrine DBAL library to generate DDL files from the abstractions. Please read more here.

Generating MySQL file from actorTable.json
Output:

Generating SQLite file from actorTable.json
Output: