在sql中选择按日加一的日期时间数据

Question

I am working on a C# program where I have to select some specific datetime records from 2012 SQL server. The data record has two DateTime columns, start and ending. I just need the data if begin and ending is not the same day.

SELECT * FROM table WHERE CAST(start AS DATE) != CAST(end AS DATE)

but this is not the problem yet. I need it a little bit more specific, I only want the data if the end date is the starting date plus one day, no matter what time booth of them have.

I made some pseudocode, unfortunately my SQL skills are quite limited.

 SELECT Convert(date, getdate()) start
 FROM table
 WHERE EXISTS 
 (SELECT Convert(date, getdate())Ende FROM table  WHERE end = dateadd(day,1,start) )

The result should be all rows where start + 1 day = end (ignoring the time in the DateTime), so I can work with the data in my c# Programm.

I hope you can help me out, thank you.

Answer 1

You can use DATEDIFF :

SELECT * 
FROM table 
WHERE DATEDIFF(d, [start], [end]) = 1;

LiveDemo