How to join table variables? [duplicate] - sql

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Closed 10 years ago.
Possible Duplicate:
T-SQL: How to join #variable tables (another try)
First: I'm using SQL Server 2008.
In a complex algorithm that involves a lot of data, I have been using a technical of creating intermediate table variables:
DECLARE #table AS TABLE (Col1 INT, Col2 VARCHAR(100))
Unfortunately, SQL Server does not support JOIN'ing #variable tables, it is only allowed to join "true" tables, those in the database.
I could do the "manual" join, like
FROM #table1 t1, #table2 t2
WHERE t1.Id = t2.Id
This results in a INNER JOIN, but this is wrong for me. The question is: How do FULL JOIN two #variable tables?

Answer 1

What do you mean by SQL doesn't support Joining table variables?
It works for me
DECLARE #table1 AS TABLE (Col1 INT, Col2 VARCHAR(100))
DECLARE #table2 AS TABLE (Col1 INT, Col2 VARCHAR(100))
SELECT *
FROM #table1 t1
FULL JOIN #table2 t2 on t1.Col1 = t2.Col1

Answer 2

You should be able to do a join using an #tableVariable
SELECT *
FROM table1 t
FULL JOIN #tableVariable tv
ON (tv.col = cnc.col)
Could it have anything to do with your compatability setting? (mine is at 100)
sp_dbcmptlevel 'database_name'
ALTER DATABASE database_name
SET COMPATIBILITY_LEVEL = { 80 | 90 | 100 }

Answer 3

I'm not sure what you're asking, as joining works just fine for table variables. See this example:
declare #table as table (Col1 int, Col2 varchar(100))
declare #table2 as table (Col1 int, Col2 varchar(100))
insert into #table
select 1, 'A'
union all
select 1, 'C'
union all
select 1, 'D'
insert into #table2
select 2, 'A'
union all
select 2, 'B'
union all
select 2, 'D'
union all
select 2, 'E'
select
*
from
#table t1 full outer join
#table2 t2 on t1.Col2 = t2.Col2
select
*
from
#table t1 left join
#table2 t2 on t1.Col2 = t2.Col2
select
*
from
#table t1 right join
#table2 t2 on t1.Col2 = t2.Col2
select
*
from
#table t1 join
#table2 t2 on t1.Col2 = t2.Col2