A Database Error Occurred

Error Number: 1242

Subquery returns more than 1 row

SELECT count(*) AS total FROM cp_coupon INNER JOIN cp_coupon_category USING(coupon_id) WHERE cp_coupon_category.category_id = (SELECT category_id FROM cp_category WHERE slug = 'industrial-supplies') AND cp_coupon.deleted = '0' AND begin < UNIX_TIMESTAMP()

Filename: /home/qisike/www/icoupon365/models/coupon_model.php

Line Number: 880