column data from another table

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column data from another table

Author

Topic

rishabhgairola
Starting Member

2 Posts

Posted - 2012-11-20 : 00:46:47

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
Master Smack Fu Yak Hacker

6065 Posts

Posted - 2012-11-20 : 01:06:13

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

bandi
Master Smack Fu Yak Hacker

2242 Posts

Posted - 2012-11-20 : 01:16:53

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

TG
Master Smack Fu Yak Hacker

6065 Posts

Posted - 2012-11-20 : 01:20:35

Thanks for doing the heavy lifting, Chandu!

Be One with the Optimizer
TG

visakh16
Very Important crosS Applying yaK Herder

52326 Posts

Posted - 2012-11-20 : 02:18:21

[code]
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
[/code]

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

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