摘要:
delimiter && [函数创建语句.....] [Err] 1418 - This function has none of DETERMINISTIC, NO SQL, or READS SQL DATA in its declaration and binary logging is en 阅读全文
摘要:
#update 和 select在同一张表的时候会显示冲突 报错信息: [Err] 1093 - You can't specify target table 'tb_a' for update in FROM clause update tb_a set sex='boy' where uid = 阅读全文
摘要:
select * from user order by rand() limit 100 ##《随机读》读取100条数据 select * from user_info where uid in(select id from user where age<=18) ##《子查询》嵌套子查询作为筛选条 阅读全文