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;
DELETE t1 FROM invest_year t1, invest_year t2 WHERE t1.pro_id = t2.pro_id AND t1.pro_year = t...
truncate table 表名...
减去一天SELECT DATE_SUB(CURDATE(), INTERVAL 1 DAY);减去一个小时hour(now())-1...
mysql> select CONCAT('My', 'S', 'QL');...
update 表名 SET log_Content = REPLACE(log_Content,'"upload','"/upload')...
SELECT * from system_user LIMIT 60,20limit是设置分页的关键他可以控制数据输出偏移SELECT column_name,column_name FR...