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 column data from another table
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rishabhgairola
Starting Member

India
2 Posts

Posted - 11/20/2012 :  00:46:47  Show Profile  Reply with Quote
i have a table named ColumnField like this :-

ID L1 L2 L3 L4 L5 L6 L7 L8 L9 L10
1 1 3 4 4 7 2 5 2 3 2
2 2 7 5 3 4 3 2 3 1 1
3 3 4 6 4 2 4 4 4 2 4
4 4 3 2 5 7 2 6 5 1 5
5 5 2 3 6 1 4 7 7 4 7

and another table named ColumnText like this :-
TextID Text
1 aerosol
2 hydro
3 solar
4 nuclear
5 lunar
6 tidal
7 wind

I need to generate a table where all the fields L1,L2,L3...L10 are replaced with their corresponding texts. Also, the numbers under the various coulmns in the columnField table (L1,L2...L10) correspond to the TextID of the ColumnText table.

Thanks in advance.

TG
Flowing Fount of Yak Knowledge

USA
5937 Posts

Posted - 11/20/2012 :  01:06:13  Show Profile  Reply with Quote
untested but this should work:

select t1.text as L1
       ,t2.text as L2
       ,etc...
from ColumnField f
join ColumnText t1 on t1.textid = f.L1
join columnText t2 on t2.textid = f.L2
etc...


Be One with the Optimizer
TG
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bandi
Flowing Fount of Yak Knowledge

India
2169 Posts

Posted - 11/20/2012 :  01:16:53  Show Profile  Reply with Quote
Hi TG, your solution is correct



declare @ColumnField table (ID int, L1 int, L2 int, L3 int, L4 int, L5 int, L6 int, L7 int, L8 int, L9 int, L10 int)
insert into @ColumnField
select 1, 1, 3, 4, 4, 7, 2, 5, 2, 3, 2 union all
select 2, 2, 7, 5, 3, 4, 3, 2, 3, 1, 1 union all
select 3, 3, 4, 6, 4, 2, 4, 4, 4, 2, 4 union all
select 4, 4, 3, 2, 5, 7, 2, 6, 5, 1, 5 union all
select 5, 5, 2, 3, 6, 1, 4, 7, 7, 4, 7

declare @ColumnText table(TextID int, [Text] varchar(20))
insert into @ColumnText
select 1, 'aerosol' union all
select 2, 'hydro' union all
select 3, 'solar' union all
select 4, 'nuclear' union all
select 5, 'lunar' union all
select 6, 'tidal' union all
select 7, 'wind'

select f.id
,t1.text as L1
,t2.text as L2
,t3.text as L3
,t4.text as L4
,t5.text as L5
,t6.text as L6
,t7.text as L7
,t8.text as L8
,t9.text as L9
,t10.text as L10
from @ColumnField f
join @ColumnText t1 on t1.textid = f.L1
join @ColumnText t2 on t2.textid = f.L2
join @ColumnText t3 on t3.textid = f.L3
join @ColumnText t4 on t4.textid = f.L4
join @ColumnText t5 on t5.textid = f.L5
join @ColumnText t6 on t6.textid = f.L6
join @ColumnText t7 on t7.textid = f.L7
join @ColumnText t8 on t8.textid = f.L8
join @ColumnText t9 on t9.textid = f.L9
join @ColumnText t10 on t10.textid = f.L10


--
Chandu
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TG
Flowing Fount of Yak Knowledge

USA
5937 Posts

Posted - 11/20/2012 :  01:20:35  Show Profile  Reply with Quote
Thanks for doing the heavy lifting, Chandu!

Be One with the Optimizer
TG
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visakh16
Very Important crosS Applying yaK Herder

India
52249 Posts

Posted - 11/20/2012 :  02:18:21  Show Profile  Reply with Quote

SELECT ID,[L1],[L2],...,[L10]
FROM
(
SELECT ID,m.Cat,n.Text
FROM
(
SELECT ID,Cat,Val
FROM ColumnField
UNPIVOT (Val FOR Cat IN ([L1],[L2],[L3],...,[L10]))u
)m
INNER JOIN ColumnText n
ON n.TextID = m.Val
)p
PIVOT(MAX(Text) FOR Cat IN ([L1],[L2],...,[L10]))q


------------------------------------------------------------------------------------------------------
SQL Server MVP
http://visakhm.blogspot.com/


Edited by - visakh16 on 11/20/2012 02:18:56
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