T-SQL solution for GYM trainers TimeTable and session booking [closed] - sql

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Closed 10 years ago.
I have four tables
tblEmployees
EmployeeID Name
1 Zahiz
2 Nigon
3 Jimian
4 Ash
5 Dani
tblMembers
MemberNo FirstName
1 Saleem
2 Jamil
3 Jazi
4 funa
5 Jhon
6 Moum
RefSessions
SessionID StartTime EndTime
1 0701 0730
2 0731 0800
3 0801 0830
4 0831 0900
5 0901 0930
6 0931 1000
7 1001 1030
8 1031 1100
9 1101 1130
10 1131 1200
11 1201 1230
12 1231 1300
13 1301 1330
14 1331 1400
15 1401 1430
16 1431 1500
17 1501 1530
18 1531 1600
19 1601 1630
20 1631 1700
21 1701 1730
22 1731 1800
23 1801 1830
24 1831 1900
25 1901 1930
26 1931 2000
27 2001 2030
28 2031 2100
tblBookSession
BookingID SessionID EmployeeID MemberNo SessionDate
1 15 2 3 2012-09-30
2 16 2 3 2012-09-30
3 1 3 4 2012-10-03
4 2 3 4 2012-10-03
5 3 3 4 2012-10-03
6 4 3 4 2012-10-03
I am looking for a t-sql query resulting in said form against a specific date
Its actually booking of time slot of trainers in a gym and displaying In the form of date wise report

Answer 1

You will need to perform a PIVOT. There are two ways to do this with PIVOT, either a Static Pivot where you code the columns to transform or a Dynamic Pivot which determines the columns at execution.
A Static Pivot, you will need to hard-code the values:
select name,
IsNull([701-730], '') [701-730],
IsNull([731-800], '') [731-800],
IsNull([801-830], '') [801-830],
IsNull([831-900], '') [831-900]
from
(
select e.name,
cast(e.starttime as varchar(10))+'-'
+cast(e.endtime as varchar(10)) Session,
m.FirstName
from
(
select *
from tblEmployees e
cross apply RefSessions
) e
left join tblBookSession b
on e.EmployeeID = b.EmployeeID
and e.sessionid = b.sessionid
left join tblMembers m
on b.MemberNo = m.MemberNo
) x
pivot
(
max(FirstName)
for session in ([701-730], [731-800], [801-830], [831-900]) -- additional sessions here
)p
See SQL Fiddle with Demo
If you have many values to transform into columns or an unknown number of values, then you will want to use a dynamic sql version of the PIVOT:
DECLARE #cols AS NVARCHAR(MAX),
#colsPivot AS NVARCHAR(MAX),
#query AS NVARCHAR(MAX)
select #cols = STUFF((SELECT ','
+ QUOTENAME(cast(starttime as varchar(10))
+'-'+cast(endtime as varchar(10)))
from RefSessions
FOR XML PATH(''), TYPE
).value('.', 'NVARCHAR(MAX)')
,1,1,'')
select #colsPivot = STUFF((SELECT ', IsNull('
+ QUOTENAME(cast(starttime as varchar(10))
+'-'+cast(endtime as varchar(10))) +', '''') as [' +
cast(starttime as varchar(10))
+'-'+cast(endtime as varchar(10)) + ']'
from RefSessions
group by SessionID, starttime, endtime
order by SessionID
FOR XML PATH(''), TYPE
).value('.', 'NVARCHAR(MAX)')
,1,1,'')
set #query = 'SELECT name, ' + #colsPivot + ' from
(
select e.name,
cast(starttime as varchar(10))+''-''
+cast(endtime as varchar(10)) Session,
m.FirstName
from
(
select *
from tblEmployees e
cross apply RefSessions
) e
left join tblBookSession b
on e.EmployeeID = b.EmployeeID
and e.sessionid = b.sessionid
left join tblMembers m
on b.MemberNo = m.MemberNo
) x
pivot
(
max(FirstName)
for Session in (' + #cols + ')
) p '
execute(#query)
See SQL Fiddle with Demo