sql - 显示客户的最大日期

Question

演示

如果我在“2013-10-29”上搜索，我必须显示 Visit_Date 列的最大日期，然后记录显示这些客户的日期为“2013-10-29”，但在列中我必须显示客户的最大日期

Answer 1

这个 ...

SELECT
P_Master.PID,
Visit_Date,
(SELECT MAX(Visit_Date) FROM P_Visit v WHERE v.PID = p_Master.PID) as MaxVisit
FROM P_Master
LEFT JOIN P_VISIT
ON P_Master.PID=P_VISIT.PID
WHERE CAST(CONVERT(varchar(10), Visit_Date, 101) AS datetime)='2013-10-29'

... 添加最近访问日期的列

Answer 2

SELECT 
P_Master.PID,  
Visit_Date FROM P_Master 
LEFT JOIN P_VISIT 

on Visit_Date=(SELECT MAX(Visit_Date) FROM [dbo].[P_Visit] WHERE  P_Master.PID=P_VISIT.PID )

Answer 3

尝试这个 ：

SELECT 
P_Master.PID,  
(SELECT MAX(Visit_Date) FROM P_Master
LEFT JOIN P_VISIT ON P_Master.PID=P_VISIT.PID) AS VISIT_DATE
FROM P_Master
LEFT JOIN P_VISIT
ON P_Master.PID=P_VISIT.PID
WHERE CAST(CONVERT(varchar(10), Visit_Date, 101) AS datetime)='2013-10-29'

Answer 4

SELECT 
P_Master.PID,  
MAX(Visit_Date) FROM P_Master
LEFT JOIN P_VISIT
ON P_Master.PID=P_VISIT.PID

将为您提供每位访客的最近一次访问