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 -h ***.***.***.*** -P 3306 -u root -pmysqldump -h ***.***.***.*** -P 3...
SELECT * FROM shop_count WHERE DATE(count_date)=current_date(); SELECT * FROM sho...
select count(id),字段from 表名 group by字段 having count(字段)>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...
SELECT * FROM **** WHERE trim(字段名) REGEXP '[^0-9]'=1...
设置my.cnf : auto-rehashmysql>use mysql; #这是关键...