pg_query Execute a query resourcepg_query resourceconnection stringquery pg_query returns a query result resource if query could be executed. It returns &false; on failure or if connection is not a valid connection. Details about the error can be retrieved using the pg_last_error function if connection is valid. pg_last_error sends an SQL statement to the PostgreSQL database specified by the connection resource. The connection must be a valid connection that was returned by pg_connect or pg_pconnect. The return value of this function is an query result resource to be used to access the results from other PostgreSQL functions such as pg_fetch_array. connection is a optional parameter for pg_query. If connection is not set, default connection is used. Default connection is the last connection made by pg_connect or pg_pconnect. Although connection can be omitted, it is not recommended, since it could be a cause of hard to find bug in script. This function used to be called pg_exec(). pg_exec() is still available for compatibility reasons but users are encouraged to use the newer name. See also pg_connect, pg_pconnect, pg_fetch_array, pg_fetch_object, pg_num_rows, and pg_affected_rows.