Pick each column value on different criteria - sql

Question

I have a SQL Query as below:
SELECT urban_appr, urban_in, rural_appr, rural_in, ground_appr, ground_in
FROM <table>
In the above query, I have to add WHERE clause as follows:
For urban values, WHERE scheme_type = 'U'
For rural values, WHERE scheme_type = 'R'
For ground values, WHERE scheme_type = 'E'
I want all this using single SQL query. I am using SQL Server 2005.
Edited:
Added image below of the actual problem. You can see that it is showing district BR as two records, whereas I want it in one row.

Answer 1

Use JOIN to bring all rows for each district_nm into one row:
select
district_nm,
t1.urban_appr, t1.urban_in,
t2.rural_appr, t2.rural_in,
t3.ground_appr, t3.ground_in
from <table> t1
join <table> t2 on t2.district_nm = t1.district_nm and t2.scheme_type = 'R'
join <table> t3 on t3.district_nm = t1.district_nm and t3.scheme_type = 'E'
where t1.scheme_type = 'U';
You can add more conditions to the where clause as you like, eg and t1.district_nm = 'x'
Consider creating a view from the above query and use that in our app instead:
create view table_view as
<above query>

Answer 2

Are you trying to do something like this - selecting different columns depending on the type of your values??
SELECT urban_appr, urban_in, NULL, NULL, NULL, NULL
FROM dbo.YourTable WHERE scheme_type = 'U'
UNION
SELECT NULL, NULL, rural_appr, rural_in, NULL, NULL
FROM dbo.YourTable WHERE scheme_type = 'R'
UNION
SELECT NULL, NULL, NULL, NULL, ground_appr, ground_in
FROM dbo.YourTable WHERE scheme_type = 'E'
???
Update: so you want to add another column and group by it:
SELECT district_nm, urban_appr, urban_in, NULL, NULL, NULL, NULL
FROM dbo.YourTable WHERE scheme_type = 'U'
UNION
SELECT district_nm, NULL, NULL, rural_appr, rural_in, NULL, NULL
FROM dbo.YourTable WHERE scheme_type = 'R'
UNION
SELECT district_nm, NULL, NULL, NULL, NULL, ground_appr, ground_in
FROM dbo.YourTable WHERE scheme_type = 'E'
GROUP BY district_nm
Is that what you're looking for??

Answer 3

Well, this looks ugly - but try this...
SELECT ISNULL(district_nm,nm) district_nm,
URBAN_APPR,
URBAN_IN,
RURAL_APPR,
RURAL_IN,
ground_appr,
ground_in
FROM
(SELECT ISNULL(a.district_nm, b.district_nm) nm,
urban_appr,
urban_in,
rural_appr,
rural_in
FROM
(SELECT DISTRICT_NM,
URBAN_APPR,
URBAN_IN
FROM TABLE_NAME
WHERE SCHEME_TYPE = 'U'
) a
FULL OUTER JOIN (
(SELECT DISTRICT_NM,
RURAL_APPR,
RURAL_IN
FROM TABLE_NAME
WHERE SCHEME_TYPE = 'R'
)B)
ON a.district_nm = b.district_nm
) temp
FULL OUTER JOIN (
(SELECT DISTRICT_NM,
GROUND_APPR,
GROUND_IN
FROM TABLE_NAME
WHERE SCHEME_TYPE = 'E'
)c)
ON temp.nm = c.district_nm;