Question

I’m facing a strange query result and I want to ask you why I’m facing this issue.

I store some datetime data into TestTable as following :

creation_time
-----------------------
2010-07-10 00:01:43.000
2010-07-11 00:01:43.000
2010-07-12 00:01:43.000

This table is created and filled as following :

create table TestTable(creation_time datetime);
Insert into  TestTable values('2010-07-10 00:01:43.000');
Insert into  TestTable values('2010-07-11 00:01:43.000');
Insert into  TestTable values('2010-07-12 00:01:43.000');

when I execute this query , I get two rows only instead of three as I expected:

SELECT *  FROM TestTable
WHERE  creation_time BETWEEN  CONVERT(VARCHAR(10),'2010-07-10',111) -- remove time part
                     and      CONVERT(VARCHAR(10),'2010-07-12',111) -- remove time part  

Or if I execute this query , the same issue ..

SELECT *  FROM TestTable
WHERE  CONVERT(datetime,creation_time,111) BETWEEN  CONVERT(VARCHAR(10),'2010-07-10',111) -- remove time part
                                              and      CONVERT(VARCHAR(10),'2010-07-12',111) -- remove time part

My Question :

• Why the last row (‘2010-07-12 00:01:43.000’) does not appear in
  the result even if I set the date range to cover all the day from 2010-07-10 to 2010-07-12?
• I use Sql server 2005 express edition with windows xp 32-bits.
• I’m trying to don’t use a workaround solution such as increasing the date range to cover additional day to get the days I want.

Thanks .

Answer 1

You need to remove the time part from creation_time as well. Just use the same CONVERT if it works.

Currently you’re asking if 2010-07-12 00:01:43.000 is less than 2010-07-12 00:00:00.000, which is not true.