Creates or modifies database tables based on the specified SQL query to create table.
Escapes data for use in a MySQL query. Protects against SQL injections. May accept an array of strings for processing.
Given a meta query, generates SQL clauses to be appended to a main query.
Retrieve the number of database queries during the WordPress execution.
Retrieves WHERE part of the SQL query where posts with 'private' post status for authenticated users will be taken into account.
Ensures a string is a valid SQL 'order by' clause.
Retrieves one variable from the database.