SQL.ResultMetadata.lastInsertRowid

The key that an INSERT generated.

• PostgreSQL: null. Use RETURNING.
• MySQL: the first AUTO_INCREMENT value of the statement, 0 if there is none. Above Number.MAX_SAFE_INTEGER it is a string, or a BigInt with bigint: true.
• SQLite: the rowid of the last inserted row, also after a statement that inserts nothing. null for a statement that only reads. A BigInt with safeIntegers: true or bigint: true.