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;
减去一天SELECT DATE_SUB(CURDATE(), INTERVAL 1 DAY);减去一个小时hour(now())-1...
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...
让时间加一天,以及转换时间到INT数字格式UPDATE zbp_postSET log_CreateTime = UNIX_TIMESTAMP(DATE_ADD('2020-07-14 09:...
mysql> select CONCAT('My', 'S', 'QL');...
select count(id),字段from 表名 group by字段 having count(字段)>1;...
DELETE t1 FROM invest_year t1, invest_year t2 WHERE t1.pro_id = t2.pro_id AND t1.pro_year = t...