A Database Error Occurred

Error Number: 1064

You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'AND friendly_url='agua-potable'' at line 1

SELECT id, idCat, friendly_url FROM subcategorias WHERE idCat= AND friendly_url='agua-potable'

Filename: models/web/Model_global.php

Line Number: 159