mysql union出错: "Every derived table must have its own alias"
SELECT count(*) from (SELECT province_code as area_id, count(*) from t_cas_rural_selected GROUP BY province_code
UNION all SELECT city_code as area_id, COUNT(*) from t_cas_rural_selected GROUP BY city_code
UNION all SELECT county_code as area_id, COUNT(*) from t_cas_rural_selected GROUP BY county_code)
as tTotal
如上,后面加个 as tablename 就可以了,例如:"as tTotal"
mysql union出错: "Every derived table must have its own alias"的更多相关文章
- mysql出现错误“ Every derived table must have its own alias”
Every derived table must have its own alias 这句话的意思是说每个派生出来的表都必须有一个自己的别名 一般在多表查询时,会出现此错误. 因为,进行嵌套查询的时 ...
- 【MySQL】mysql出现错误“ Every derived table must have its own alias”
Every derived table must have its own alias 这句话的意思是说每个派生出来的表都必须有一个自己的别名 一般在多表查询时,会出现此错误. 因为,进行嵌套查询的时 ...
- Mysql错误:Every derived table must have its own alias
Mysql报错:Every derived table must have its own alias <缺少一个别名> 在子查询中经常会犯的错误 .这个别名其实没啥用途.... ...
- MySQL错误:Every derived table must have its own alias
Every derived table must have its own alias 派生表都必须有自己的别名 一般在多表查询时,会出现此错误. 因为,进行嵌套查询的时候子查询出来的的结果是作为一个 ...
- 【mysql报错】[Err] 1248 - Every derived table must have its own alias
当我运行一条联合查询的sql语句时报如下错误: [Err] 1248 - Every derived table must have its own alias,大概意思是每一张派生表必须要有自己的别 ...
- mysql—mysql错误Every derived table must have its own alias解决
Every derived table must have its own alias 这句话的意思是说每个派生出来的表都必须有一个自己的别名. 一般在多表查询时,会出现此错误. 因为,进行嵌套查询的 ...
- MySql 1248 - Every derived table must have its own alias
执行一个sql语句,报错:1248 - Every derived table must have its own alias 提示说每一个衍生出来的表,必须要有自己的别名 执行子查询的时候,外层查询 ...
- 错误代码: 1248 Every derived table must have its own alias
1.错误描述 1 queries executed, 0 success, 1 errors, 0 warnings 查询:SELECT stu_id, (SELECT stu_name FROM t ...
- Every derived table must have its own alias
完整错误信息如下: Every derived table must have its own alias 三月 28, 2017 10:20:46 上午 org.apache.catalina.co ...
随机推荐
- centos7 更改主机名
在CentOS或RHEL中,有三种定义的主机名:a.静态的(static),b.瞬态的(transient),以及 c.灵活的(pretty).“静态”主机名也称为内核主机名,是系统在启动时从/etc ...
- Ansible Playbook 使用循环语句
如下,with_items 是循环的对象,with_items 是 python list 数据结构,task 会循环读取 list 里面的值,key 的名称是 item [root@localhos ...
- HTML 格式化
格式化标签: <!DOCTYPE HTML> <html> <body> <b> This text is bold </b> # < ...
- 《C++ Primer Plus》16.2 智能指针模板类
智能指针是行为类似于指针的类对象,单这种对象还有其他功能.本节介绍三个可帮助管理动态内存分配的智能指针类.先来看看需要哪些功能以及这些功能是如何实现的.请看下面的函数:void remodel(std ...
- 【CSS系列】网页头部进度条方式一
<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8&quo ...
- MFC 刷新函数:Invaldate,UpdateWindow,InvaldateRect
在窗口刷新和绘制的过程中,常常需要用到窗口刷新函数.一般用于窗口图形刷新的函数有:UpdateWindows().Invaldate().InvaldateRect(). 先说UpdateWindow ...
- Oracle 学习之触发器
1. 触发器简介 触发器是存储在数据库服务器中的程序单元,当一个表或一个视图被改变,或者数据库发生某些事件时,Oracle会自动触发触发器,并执行触发器中的代码.只有在触发器中定义的事件发生时,触发器 ...
- ESlint全局变量报错
场景: 在main.js下申明了全局变量: /* eslint no-undef: "error" */ window.vm = new Vue({ el: '#app', rou ...
- LeetCode 11 Container With Most Water(分支判断问题)
题目链接 https://leetcode.com/problems/container-with-most-water/?tab=Description Problem: 已知n条垂直于x轴的线 ...
- python--利用列表推导式快速生成xml格式数据
在接口自动化测试中,我们经常将要发送的数据放到excel里. json数据放至excel方便,但最近的一个测试,数据是xml格式发送的 如下: 属性 必选/可选 描述 1. Message Eleme ...