INSERT INTO announcement (merchant_id, title, content, type, status) VALUES (#{merchantId}, #{title}, #{content}, #{type}, #{status}) SELECT * FROM announcement WHERE merchant_id = #{merchantId} ORDER BY create_time DESC SELECT * FROM announcement WHERE status = 1 ORDER BY create_time DESC SELECT * FROM announcement WHERE id = #{id} UPDATE announcement title = #{title}, content = #{content}, type = #{type}, status = #{status}, WHERE id = #{id} DELETE FROM announcement WHERE id = #{id}