子查询where子句 [英] Subqueries where clause

查看:155
本文介绍了子查询where子句的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!

问题描述

我是sql的初学者。请有人解释(在哪里1< ..............)以下查询



SELECT salesman_id,name

FROM salesman a

WHERE 1<

(SELECT COUNT(*)

FROM customer

WHERE salesman_id = a.salesman_id);



我尝试了什么:



我尝试了不同的查询,但我不明白这个

I am beginner in sql. Please someone explain ( WHERE 1 < ..............) below query

SELECT salesman_id,name
FROM salesman a
WHERE 1 <
(SELECT COUNT(*)
FROM customer
WHERE salesman_id=a.salesman_id);

What I have tried:

I tried different query but I don't understand this

推荐答案

它选择所有拥有多个客户的销售人员。
It selects all salesmen that has more than one customer.


这篇关于子查询where子句的文章就介绍到这了,希望我们推荐的答案对大家有所帮助,也希望大家多多支持IT屋!

查看全文
登录 关闭
扫码关注1秒登录
发送“验证码”获取 | 15天全站免登陆