WordPress database access abstraction class.

Do not use, deprecated.

Kills cached query results.

Retrieves one column from the database.

Retrieves column metadata from the last query.

Retrieves an entire SQL result set from the database (i.e., many rows).

Retrieves one row from the database.

Retrieves one variable from the database.

Disables showing of database errors.

Prints SQL/DB error.