统计mysql字段值的长度
SELECT product_brand FROM shop_product WHERE LENGTH(product_brand)>3;
SELECT product_brand FROM shop_product WHERE LENGTH(product_brand)>3;
mysql> select CONCAT('My', 'S', 'QL');...
if the end if 最后需要用分号';'结束out的值在select 中需要用 into赋值 其他情况 可以尝试setphp获取out的值需要$sql="call&n...
1.date型转换成int型 UNIX_TIMESTAMP('2007-10-04 22:23:00') 2.int型转换成date型 FROM_UNIXTIME(97599...
truncate table 表名...
DELETE t1 FROM invest_year t1, invest_year t2 WHERE t1.pro_id = t2.pro_id AND t1.pro_year = t...
SELECT * FROM shop_count WHERE DATE(count_date)=current_date(); SELECT * FROM sho...