having

引用:https://zhidao.baidu.com/question/406745181.html

对函数输出进行限制

栗子:

比如,我们可能只希望看到Store_Information数据表中销售总额超过1500美圆的商店的信息,这时我们就需要使用HAVING从句。语法格式为: 
SELECT "column_name1", SUM("column_name2") 
FROM "table_name"
GROUP BY "column_name1"
HAVING (arithematic function condition)


SELECT store_name, SUM(sales) 
FROM Store_Information
GROUP BY store_name
HAVING SUM(sales) > 1500

having放在groupby语句作为子句存在

整理:
select 分组列名,聚合函数 from 表名 group by 分组列 having 条件
原文地址:https://www.cnblogs.com/newrohlzy/p/8783540.html