Question

为我的表设置了一个查询，我希望在前几周内显示某些反应，这在我写的时候效果很好

SELECT * 
FROM reactiondata 
WHERE reaction_time > DATE_SUB(NOW(), INTERVAL 1 WEEK) 
ORDER BY reaction_time ASC;

此查询还会选择唯一的促销ID字段和不同的用户名，以便您可以查看已发送了哪些促销ID的唯一用户名。

SELECT 
   reaction_promoID, 
   COUNT( DISTINCT reaction_username) AS reaction_username  
FROM reactiondata GROUP BY reaction_promoID

但是，我想这样，所以第二个查询在上周的日期范围内工作，就像第一个查询一样。当我向查询中添加Where等...时它不起作用。

任何帮助都非常明确！

A + TS

Answer 1

SELECT reaction_promoID, COUNT( DISTINCT reaction_username) AS reaction_username  
FROM reactiondata 
WHERE reaction_time > DATE_SUB(NOW(), INTERVAL 1 WEEK)
GROUP BY reaction_promoID

Answer 2

我认为现在是HAVING子句的时候了：

http://www.w3schools.com/sql/sql_having.asp

SELECT reaction_promoID, COUNT( DISTINCT reaction_username) AS reaction_username  
FROM reactiondata 
GROUP BY reaction_promoID
HAVING  reaction_time > DATE_SUB(NOW(), INTERVAL 1 WEEK)

SQL Distinct从某个日期范围开始计数？

2 个答案: