Sql Query: not able to add a column from another table - sql

Question

I am using this query currently which is running correctly:
SELECT
t.TestId,
t.Days,
t.UserId_Fk
, [Date] = Convert(date,DATEADD(dd, 0, DATEDIFF(dd, 0, t.CheckIn)))
, CheckIn = CONVERT(CHAR(5), t.CheckIn, 108)
, CheckOut = CONVERT(CHAR(5), t.CheckOut, 108)
, [Hours] = CAST(DATEDIFF(MINUTE, t.CheckIn, t.CheckOut) / 60. AS DECIMAL(10,2))
FROM (
SELECT
TestId=t.TestId,
Days=t.Days,
t.UserId_Fk
, CheckIn = t.CheckInTime
, CheckOut = r.CheckInTime
, RowNum = ROW_NUMBER() OVER (PARTITION BY t.UserId_Fk, r.CheckInTime ORDER BY 1/0)
FROM UserTime t
OUTER APPLY (
SELECT TOP 1 *
FROM UserTime t2
WHERE
t2.CheckInTime > t.CheckInTime
AND DATEADD(dd, 0, DATEDIFF(dd, 0, t.CheckInTime)) = DATEADD(dd, 0, DATEDIFF(dd, 0, t2.CheckInTime))
AND t2.LoginStatus = 'O'
ORDER BY t2.CheckInTime
) r
WHERE t.LoginStatus = 'I'
) t
WHERE t.RowNum = 1
The result is :
TestId Days UserId_Fk Date CheckIn CheckOut Hours
45 Tuesday 3 2014-05-13 11:49 11:49 0.00
I want to add another field(column) in this result Named FullName which is from another
table Users
I tried various things but was unsuccessful.
Table relations are:
Table Test
TestId int(pk)
UserId_Fk int
Days nvarchar(50)
CheckInTime datetime
LoginStatus char(1)
Table Users
UserId int(Pk)
FullName varchar(50)

Answer 1

First join Test & Users table and then try to select the full name of the user. You can join through userid_fk. After joining you can apply top 1 selection & other formating over that joined table.
Something like below:
SELECT
t.TestId,
t.Days,
t.UserId_Fk
, [Date] = Convert(date,DATEADD(dd, 0, DATEDIFF(dd, 0, t.CheckIn)))
, CheckIn = CONVERT(CHAR(5), t.CheckIn, 108)
, CheckOut = CONVERT(CHAR(5), t.CheckOut, 108)
, [Hours] = CAST(DATEDIFF(MINUTE, t.CheckIn, t.CheckOut) / 60. AS DECIMAL(10,2))
FROM
(SELECT *
FROM test
JOIN users
ON test.userid_fk=users.userid) t
OUTER APPLY (
SELECT TOP 1 *
FROM UserTime t2
WHERE
t2.CheckInTime > t.CheckInTime
AND DATEADD(dd, 0, DATEDIFF(dd, 0, t.CheckInTime)) = DATEADD(dd, 0, DATEDIFF(dd, 0, t2.CheckInTime))
AND t2.LoginStatus = 'O'
ORDER BY t2.CheckInTime
) r
WHERE t.LoginStatus = 'I'
) t
WHERE t.RowNum = 1
Please try few times and fix the query if there is any typo.

Answer 2

SELECT
t.TestId,
t.Days,
t.FullName
, [Date] = Convert(date,DATEADD(dd, 0, DATEDIFF(dd, 0, t.CheckIn)))
, CheckIn = CONVERT(CHAR(5), t.CheckIn, 108)
, CheckOut = CONVERT(CHAR(5), t.CheckOut, 108)
, [Hours] = CAST(DATEDIFF(MINUTE, t.CheckIn, t.CheckOut) / 60. AS DECIMAL(10,2))
FROM (
SELECT
FullName=Users.FullName,
TestId=t.TestId,
Days=t.Days,
t.UserId_Fk
, CheckIn = t.CheckInTime
, CheckOut = r.CheckInTime
, RowNum = ROW_NUMBER() OVER (PARTITION BY t.UserId_Fk, r.CheckInTime ORDER BY 1/0)
FROM UserTime t
Inner join Users
on t.UserId_Fk=Users.UserId
OUTER APPLY (
SELECT TOP 1 *
FROM UserTime t2
WHERE
t2.CheckInTime > t.CheckInTime
AND DATEADD(dd, 0, DATEDIFF(dd, 0, t.CheckInTime)) = DATEADD(dd, 0, DATEDIFF(dd, 0, t2.CheckInTime))
AND t2.LoginStatus = 'O'
ORDER BY t2.CheckInTime
) r
WHERE t.LoginStatus = 'I'
) t
WHERE t.RowNum = 1