Changes the current SQL mode, and ensures its WordPress compatibility.

Enables showing of database errors.

Strips any invalid characters based on value/charset pairs.

Strips any invalid characters from the string for a given table and column.

Strips any invalid characters from the query.

Determines whether the database supports collation.

Enables or disables suppressing of database errors.

Returns an array of WordPress tables.

Starts the timer, for debugging purposes.

Stops the debugging timer.