Retrieve multiple pieces of data from a single SQL Server variable - sql

Question

I have two variables like:
#FieldName
#values
Those two variables hold values like:
#FieldName - contains [a],[b],[c],[d]
#values - contains 5,6,7,8
Now I need to retrieve the data of column 'b' & 'd' only.
How can we get b=6 & d=8?
Thanks in advance.

Answer 1

well I hate to do such a things on SQL Server, but
declare #FieldName nvarchar(max) = '[a],[b],[c],[d]'
declare #values nvarchar(max) = '5,6,7,8'
declare #i int, #j int, #break int
declare #a nvarchar(max), #b nvarchar(max), #result nvarchar(max)
select #break = 0
while #break = 0
begin
select #i = charindex(',', #FieldName), #j = charindex(',', #values)
if #i > 0 and #j > 0
begin
select #a = left(#FieldName, #i - 1), #b = left(#values, #j - 1)
select #FieldName = right(#FieldName, len(#FieldName) - #i), #values = right(#values, len(#values) - #j)
end
else
begin
select #a = #FieldName, #b = #values, #break = 1
end
if #a in ('[b]', '[d]')
select #result = isnull(#result + ' & ', '') + #a + '=' + #b
end
select #result
You can also put all this list into temporary/variable table and do join.
select *
from
(
select T.<yourcolumn>, row_number() over (order by T.<yourcolumn>) as rownum
from <temptable1> as T
) as F
inner join
(
select T.<yourcolumn>, row_number() over (order by T.<yourcolumn>) as rownum
from <temptable2> as T
) as V on V.rownum = F.rownum
Or, even better, you can pass parameters into sp in xml form and not in distinct lists

Answer 2

Try this :
Using XML i'm are trying to spilt the values and storing the result in a table variable
DECLARE #FieldName VARCHAR(MAX),
#values varchar(max)
SET #FieldName = 'a,b,c,d';
SET #values = '5,6,7,8'
SET #FieldName = #FieldName + ',';
SET #values = #values + ',';
DECLARE #X XML
SET #X = CAST('<Item>' + REPLACE(#FieldName, ',', '</Item><Item>') + '</Item>' AS XML)
Declare #X1 XML
Set #X1=CAST('<Position>' + REPLACE(#values, ',', '</Position><Position>') + '</Position>' AS XML)
Declare #FieldSample table
(
FieldName char(1),
rowNum int
)
Declare #valueSample table
(position int,
rowNum int)
Insert into #FieldSample(rowNum,FieldName)
Select * from (
SELECT row_number() over (order by (select 0)) as rowNum, t.value('.', 'char(1)') as field
FROM #x.nodes('/Item') as x(t)
) as a
where a.field !=''
Insert into #valueSample(rowNum,position)
Select * from (
Select row_number() over (order by (select 0)) as rowNum, k.value('.', 'int') as position
from #X1.nodes('/Position') as x1(k)
) as b
where b.position !=0
Basically the last logic you can change it based on how you intend to get the data
Select a.FieldName,b.position from #FieldSample as a
inner join #valueSample as b
on a.rowNum=b.rowNum
where b.position = 6 or b.position =8