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');...
DELETE t1 FROM invest_year t1, invest_year t2 WHERE t1.pro_id = t2.pro_id AND t1.pro_year = t...
是由表格字段ID的数据库类型造成的,smallint最大数值就是65535,修改成int就可以了...
SELECT * FROM shop_count WHERE DATE(count_date)=current_date(); SELECT * FROM sho...
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...
DATE_ADD(now(),INTERVAL 1 DAY);...