初始化mysql表格,让自动增加ID字段数字恢复为0
truncate table 表名
设置my.cnf : auto-rehashmysql>use mysql; #这是关键...
DELETE t1 FROM invest_year t1, invest_year t2 WHERE t1.pro_id = t2.pro_id AND t1.pro_year = t...
mysql> select CONCAT('My', 'S', 'QL');...
select count(id),字段from 表名 group by字段 having count(字段)>1;...
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...
SELECT product_brand FROM shop_product WHERE LENGTH(product_brand)>...