1 子查询表结构如下需求查询用户分数大于其所在工作(job)分数的平均分的所有grade的属性，并且以id的升序排序SQL语句select t1.* from grade t1where score>(select avg(score) from grade t2where t1.job = t2.jobgroup by job)order by t1.id;注意的是where子句......
文章浏览阅读1.1w次。如果2张表列是一样，直接insert into Table1 select * from Table2;上面可以实现将整个Table2表里列的内容全部插入到Table1表中。如果2张表列是不一样的，可以用insert into Table1（Table1.c1,Table1.c2） select Table2.c1,Table2.c2 fro......
文章浏览阅读5.6k次。建库建表语句create database test on cluster clickhouse_cluster;报错信息↘ Progress: 0.00 rows, 0.00 B (0.00 rows/s., 0.00 B/s.) Received exception from server (version 20.1.4):Code: 159. DB::Exception: Received from localhost:9000. DB::Exception: Watching task ......
文章浏览阅读685次。mysql导入CSV错误代码： 1290 The MySQL server is running with the --secure-file-priv option so it cannot execute this错误原因:在安装MySQL的时候限制了导入与导出的目录权限,只能在规定的目录下才能导入1.进入mysql查看secure_file_priv......
