select * from #mytemp
GO
– Check the Query Plan for SQL Batch
– [ Result -- You will find that there is no ObjectName with the name of up_SampleSP ]
SELECT cp.objtype AS PlanType,
OBJECT_NAME(st.objectid,st.dbid) AS ObjectName,
cp.refcounts AS ReferenceCounts,
cp.usecounts AS UseCounts,
st.TEXT AS SQLBatch,
qp.query_plan AS QueryPlan
FROM sys.dm_exec_cached_plans AS cp
CROSS APPLY sys.dm_exec_query_plan(cp.plan_handle) AS qp
CROSS APPLY sys.dm_exec_sql_text(cp.plan_handle) AS st;
GO
– Execute Stored Procedure
EXEC up_SampleSP
GO
– Check the Query Plan for SQL Batch
– [ Result -- You will find that there is one entry with name ObjectName with name up_SampleSP ]
SELECT cp.objtype AS PlanType,
OBJECT_NAME(st.objectid,st.dbid) AS ObjectName,
cp.refcounts AS ReferenceCounts,
cp.usecounts AS UseCounts,
st.TEXT AS SQLBatch,
qp.query_plan AS QueryPlan
FROM sys.dm_exec_cached_plans AS cp
CROSS APPLY sys.dm_exec_query_plan(cp.plan_handle) AS qp
CROSS APPLY sys.dm_exec_sql_text(cp.plan_handle) AS st;
GO

Temporary tables survive the end of the queries, but table variables doesn’t.

Sometimes, you want to store some data in query #1 and you want to access them in query #2. In that cases you can’t use table variables.

About the performance:
In the first case, I inserted 10 000 rows to a simple table. Then, in the second case I inserted also 10 000 rows to the same table, but inserted their ids to a tmp table too. (with the “OUTPUT INSERTED.id INTO #tmpTable” clause in the insert query)

Sadly, the second solution was six times slower.

I am trying to find a better solution for my requirement out of Table variables and Temp tables.I tried aboe mentioned T1 and V1 in SQL server 2008. Surprisingly V1 for 100000 recs is taking more than 5mins. Please let know if I miss anything, below is the code that I executed

create procedure V1
@total int
as
declare @V table (n int, s varchar(128))
declare @t1 datetime
set @t1=getdate()
insert into @V select n,s from NUM
where n%100>0 and n<=@total
declare @res varchar(128)
select @res=max(s) from NUM
where n<=@total and
not exists(select * from @V V
where V.n=NUM.n)

select datediff(ms,@t1,getdate())
GO