MySQL语言编辑内容为:SELECT goods_id AS 商品ID,goods_name AS 商品名称,convert(char(2),sales_sum) + '个' AS 销售数量,FROM goods报错信息为:> 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 'sales_sum) + '个' AS 销售数量,FROM goods' at line 2