Difference Between Selecting Into And Temp Tables

Aug 27, 2007

Hello Tsql experts,
Can you please explain to me what the differnce is between selecting into a table and creating a new tabel and inerting in to it like so:

First way:
select names
into #ancestors
from names

and

second way

create table #names(
name varchar(10)
)

insert into #names (name) values(name)
select names from names

is it just personal choice or performance in one method is better than the other.Can you please explain.
Thanks

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A Curious Error Message, Local Temp Vs. Global Temp Tables?!?!?

Nov 17, 2004

Hi all,

Looking at BOL for temp tables help, I discover that a local temp table (I want to only have life within my stored proc) SHOULD be visible to all (child) stored procs called by the papa stored proc.

However, the following code works just peachy when I use a GLOBAL temp table (i.e., ##MyTempTbl) but fails when I use a local temp table (i.e., #MyTempTable). Through trial and error, and careful weeding efforts, I know that the error I get on the local version is coming from the xp_sendmail call. The error I get is: ODBC error 208 (42S02) Invalid object name '#MyTempTbl'.

Here is the code that works:SET NOCOUNT ON

CREATE TABLE ##MyTempTbl (SeqNo int identity, MyWords varchar(1000))
INSERT ##MyTempTbl values ('Put your long message here.')
INSERT ##MyTempTbl values ('Put your second long message here.')
INSERT ##MyTempTbl values ('put your really, really LONG message (yeah, every guy says his message is the longest...whatever!')
DECLARE @cmd varchar(256)
DECLARE @LargestEventSize int
DECLARE @Width int, @Msg varchar(128)
SELECT @LargestEventSize = Max(Len(MyWords))
FROM ##MyTempTbl

SET @cmd = 'SELECT Cast(MyWords AS varchar(' +
CONVERT(varchar(5), @LargestEventSize) +
')) FROM ##MyTempTbl order by SeqNo'
SET @Width = @LargestEventSize + 1
SET @Msg = 'Here is the junk you asked about' + CHAR(13) + '----------------------------'
EXECUTE Master.dbo.xp_sendmail
'YoMama@WhoKnows.com',
@query = @cmd,
@no_header= 'TRUE',
@width = @Width,
@dbuse = 'MyDB',
@subject='none of your darn business',
@message= @Msg
DROP TABLE ##MyTempTbl

The only thing I change to make it fail is the table name, change it from ##MyTempTbl to #MyTempTbl, and it dashes the email hopes of the stored procedure upon the jagged rocks of electronic despair.

Any insight anyone? Or is BOL just full of...well..."stuff"?

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Sep 25, 2007

Hello. I have a SP. I am passing two variables to it that are comma seperated lists (ids) so that I can use an IN clause. But since I cannot use these CSV in an IN clause directly I wrote a temp table that first parses the CS list and creates a temp table with a single column of IDS.Then in a second temp table I am selecting the data using enrollment_id IN (Select enrollment_id From #temptable)Then the SP selects data from the second temp table.This works exactly the way it is supposed to work. But when I call the SP from ASP.NET it doesn't return any data. I just cant seem to return data by selecting from a temp table. And my ASP.NET code is correct because I commented out everything and just returned the parameters I was passing and that worked. So does anyone know how to select data from a temp table in a SP when executed from ASP.NET?I even tried Table Variables and same thing. It works great in SQL but when called from ASP.NET it doesnt return any data. I am guessing it's probably losing its scope. Any quick help would be appreciated. Thank you.Here is a snippet of the SP (even this fails):CREATE PROCEDURE [dbo].[returnEnrollments](@organization_id int, @test_item_list ntext, @enrollment_list ntext)As--select  @test_item_list as tilist, @enrollment_list as elistDeclare @report_start_date datetime;Declare @report_end_date datetime;Declare @test_item_id_list varchar(8000);Declare @enrollment_id_list varchar(8000);DECLARE @TestItemID varchar(10), @Pos intDECLARE @EnrollmentID varchar(10)--Set @IDList = @test_item_id_list;--Set @EnrollmentIDList = @enrollment_id_list;Set @test_item_id_list = Cast(@test_item_list As varchar(8000))Set @enrollment_id_list = Cast(@enrollment_list As varchar(8000))Select @report_start_date = report_start_date, @report_end_date = report_end_date From organization Where organization_id = @organization_id;-- Create a temp table to store all the enrollment idsIF OBJECT_ID('tempdb..#EnrollTemp') IS NOT NULLDROP TABLE #EnrollTempCREATE TABLE #EnrollTemp (enrollment_id int NOT NULL)SET @enrollment_id_list = LTRIM(RTRIM(@enrollment_id_list))+ ','SET @Pos = CHARINDEX(',', @enrollment_id_list, 1)IF REPLACE(@enrollment_id_list, ',', '') <> ''BEGIN    WHILE @Pos > 0    BEGIN        SET @EnrollmentID = LTRIM(RTRIM(LEFT(@enrollment_id_list, @Pos - 1)))        IF @EnrollmentID <> '' And @EnrollmentID > 0        BEGIN            INSERT INTO #EnrollTemp (enrollment_id) VALUES (CAST(@EnrollmentID AS int)) --Use Appropriate conversion        END        SET @enrollment_id_list = RIGHT(@enrollment_id_list, LEN(@enrollment_id_list) - @Pos)        SET @Pos = CHARINDEX(',', @enrollment_id_list, 1)    ENDENDSelect top 20 * From #EnrollTemp  Edit: Just used a DataReader instead of a datatable and it works. Dont know why it would fail with a datatable. 

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Jul 20, 2005

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[Web application being built on ASP.net 3.5 (IIS7) connected to SQL Server 2005)

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Jan 23, 2008

Hi!

What is the difference in performance if I use a Temp-table or a local-table variable in a storedprocedure?

Why?


//Daniel

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'Error Source: Microsoft OLE DB Provider for SQL Server
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Thanks.

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Hi,

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Jun 16, 2004

I have a stored proc that creates a temporary table, then calls several other stored procs to insert data.


CREATE PROCEDURE usp_CreateTakeoff
@iEstimate int,
AS

CREATE TABLE ##Temp_Takeoff
(
Field1 ......
Field2 ......
)

-- Add Structural data
usp_AddStructural @iEstimateID, 1, 'Structural'
usp_AddForming @iEstimateID, 2, 'Forming'
...
...
...
GO


Now, a couple of problems, after the table is created and populated, I cannot find it in my list of tables, even after "refreshing".

I checked to ensure that it exists using the query analyzer and it does so I know the table is being created.

Also, I cannot see the table using crystal reports, connecting etc...... Can I not access a temporary table from 3rd party applications? I have crystal reports 7.0 professional.

Any ideas?

Mike B

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Dec 14, 2004

Hey,

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Thanks

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Apr 7, 2006

Hi,

I have a called stored procedure which creates a bunch of temporary tables, inserts data into them, indexes the tables and then returns to the main calling SP. In the main stored procedure I then do SELECTs from the temporary tables. My problem is I keep getting
invalid object errors on the temporary tables:
Invalid object name '#temp_table1'

The stored procedure is in a test environment. In the SELECT I tried a prefix of database owner (my logon) as well as "dbo." but still get the error. Any suggestions as to what I am doing wrong would be much appreciated.

Thanks,
Jeff

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Sep 4, 2007

hi All,
I am using a temp table creating it as

create table #process
(
tons of coomuns in here
)
then
insert into #process(collumns)
select from peon
where etc....

Can i use the same temp table definition , but insert into another tempTable.Does alias help me accomplish this task.
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Dec 11, 2007

In these two tables im just to bring the data back where the two DesignID's dont match. Im gettin an error

Server: Msg 107, Level 16, State 3, Line 1
The column prefix '#ttTopSellers' does not match with a table name or alias name used in the query.


Declare @CustomerID as VARCHAR(25)
Set @CustomerID = 'DELCOZ01-10'

/*Figure the designs that stores carry*/
Select Design.Description, Item.DesignID,
CustomerClassificationID, CustomerID, Region.[ID] as RegionID, Region.Name
Into #ttDesign
From Mas.dbo.Item Item
Inner Join MAS.dbo.Style Style
on Item.StyleID = Style.[ID]
Inner Join MAS.dbo.Line Line
on Style.LineID = Line.[ID]
Inner Join MAS.dbo.Design Design
on Item.DesignID = Design.[ID]
Inner Join Mas.dbo.DesignRegionIndex DRI
on Design.[ID] = DRI.DesignID
Inner Join MAS.dbo.Region Region
on DRI.RegionID = Region.[ID]
Inner Join MAS.dbo.CustomerClassificationRegionIndex CRI
on Region.[ID] = CRI.RegionID
Inner Join MAS.dbo.CustomerClassification CC
on CRI.CustomerClassificationID = CC.[ID]

Where @CustomerID = CustomerID
Group By Design.Description, Item.DesignID,
CustomerClassificationID, CustomerID, Region.[ID], Region.Name


/*This finds the top retail sales globally*/
Select Top 10 Sum(Sales) as Sales, DesignID, Design.[Description]
Into #ttTopSellers
From Reporting.dbo.RetailSales_ByStore_ByCustomer_ByDay_ByItem DI
Inner Join Mas.dbo.Item Item
on DI.ItemNumber = Item.ItemNumber
Inner Join MAS.dbo.Style Style
on Item.StyleID = Style.[ID]
Inner Join MAS.dbo.Line Line
on Style.LineID = Line.[ID]
Inner Join MAS.dbo.Design Design
on Item.DesignID = Design.[ID]
Where [Date] >= Month(getdate())-12
and DesignID <> 0
Group By DesignID, Design.[Description]
Order by Sum(Sales) Desc


Select *
From #ttDesign
Where #ttDesign.DesignID <> #ttTopSellers.DesignID


--Drop Table #ttDesign
--Drop Table #ttTopSellers

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Jul 20, 2005

Why cant I use the same temptable name i a stored procedure after i have droped it?I use the Pubs database for the test case.CREATE PROCEDURE spFulltUttrekk ASSELECT *INTO #tempFROM JobsSELECT *FROM #tempDROP TABLE #tempSELECT *INTO #tempFROM EmployeeSELECT *FROM #temp

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Nov 15, 2007



I am having problem with my temp table.
I cannot get the syntax correct.

I need to do the following, If @mybit & br > 0 then
insert childid 'condidtion case when br & @mybit > then 0'
into the temp table.



CREATE TABLE #tmp_table(

childid integer null

)


IF @mybit & br > 0 THEN


INSERT INTO #tmp_table


SELECT c.childid

VALUES (childid,

CASE WHEN br & @mybit > 0 THEN 1 ELSE 0

END)

FROM

child c

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Jun 17, 2008

Hi,
First post here :) Subject might not make sense, so allow me to explain. I have a table, tbl_finalized. A unique record consists of an emp_id, building, and school_year. I have another table, (call it table2) where emp_id, building, and school_year are fields as well. What I'm trying to do is... grab all the emp_id's from table 2 ( along with the school_year and building ) and then see if it exists in tbl_finalized. If it does, I don't want it. I want all the usernames in table2 that don't exist in tbl_finalized.

Here's an example:
table2 contains the following record:
emp_id: xxx, building: 333, school_year: 2008
emp_id: zzz, building: 333, school_year: 2008
emp_id: yyy, building: 444, school_year: 2008

tbl_finalized has the following records:
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emp_id: xxx, building: 333, school_year: 2007
emp_id: xxx, building: 333, school_year: 2008

The result I desire is:
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emp_id: yyy, building: 444, school_year: 2008

I hope this makes sense. If not, please ask and I will do my best to explain. I have light understanding of joins, but not sure how to get the difference like I desire in this case...
TIA.

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Hi all,
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Apr 2, 2007

Hi all.

I'm trying to select from multiple table in one select statement but i'm having problems. Here is the code i'm trying:



if exists (select * from dbo.sysobjects where id = object_id(N'[dbo].[snow_ors_additionalInfoRead]') and OBJECTPROPERTY(id, N'IsProcedure') = 1)
drop procedure [dbo].[snow_ors_additionalInfoRead]
GO

CREATE PROCEDURE dbo.snow_ors_additionalInfoRead
@Reference int
AS
SELECT
Account.CanTravel,
Account.SEEmployee,
Account.WorkHours,
Account.DrivingLicence,
Account.CriminalConvictions,
Account.CriminalConvictionsDetails1,
Account.CriminalConvictionsDate1,
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FROM Account, Application
WHERE Account.Reference = @Reference AND
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GO


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thanks people.

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   Please tell me there's something I haven't set.   I've done several tests now.   If your final return in a stored proc is from a temp table (ala #mytable ) the system cannot read the schema - for that matter, it won't run at all, complaining that the object #mytable doesn't exists.
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This proc, when fed to a sqldatasource,  fails in the designer with #temp does not exists.
CREATE PROCEDURE dbo.repTest_TempASBEGIN
CREATE TABLE #Temp( [iTestID]  uniqueidentifier, [bTest] [bit], [cTest] [varchar] )
INSERT INTO #TempSELECT *FROM tTest
SELECT *FROM #Temp
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Mar 17, 2001

I have been researching some performance problems in a very large
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I have one large procedure that I have been using as a test case.
Originally this procedure was a cursor with lots of processing steps
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Doing this showed no increase in performance. Since Profiler was showing .5
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Finally I replaced all the temp tables with actual tables, just to see what
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Can someone give me some clues as to what is happening here, because if this
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May 2, 2001

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When we create the ## type table in tempdb this cannot be linked from Access (cannot be seen via DSN).
The only other option we can find is doing
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May 11, 2004

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Aug 11, 1998

Hi everyone:

I am creating an sp, in which I check for the existence of a global temp table (using the exists)
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Thanks
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Jul 18, 2002

Sql 2000

Hi All,

I am creating a dts package which copies data via transform data task from a sql sever connection to an excel spreadsheet connection.
The transform data task uses a query that goes like this.

create table #temp1(CName varchar(10))

Insert #temp1
select CName from tbl1

--tbl1 is in a user DB called SALES

create table #temp2(VName varchar(10))

Insert #temp2
select CName from #temp1


select * from #temp2

--I need the resultset of the last select statement into an excel spreadsheet.
The problem is I can't even create the dts package..it shows up with an error saying that #temp1 is an invalid object....I am guessing that since the default database for the transform data task has been selected as SALES it is trying to locate the the #temp1 or #temp2 table in that DB instead of looking in the TEMPDB....My question is..is there any workaround for this problem.

Sample code welcome!!!!

Any help appreciated !

TIA
Kinnu

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Aug 30, 2004

Hi All,

I have 4 temporary tables that hold criteria selected through a report wizard.
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Would somebody be kind enough to help me out please.

To briefly summarise, I have created a SQL statement that returns all rows in my recordset, I now need to implement some additional SQL to filter the recordset using my temporary tables, which contain the filters as follows:

(1) Temp table 1 (##tblTempAssetFilt) is mandatory and will always contain at least one row.
(2) Temp table 2 (##tblTempRepairTypeFilter) is optional and may never contain any rows. If this is the case then I have no reason to filter my resultset against this table.
(3) Temp table 3 (##tblTempRepairFilter) / Temp table 4 (##tblTempRepairElementFilter) are both optional, only one of these tables will contain data at one time. Again, as an optional filter the tables may never contain rows, and thus need to be ignored.

I have the following SQL, can somebody tell me how I would go about filtering the recordset using the temporary tables. The creation of the temporary tables occurs at the beginning so will always exist even when no rows have been inserted.

SELECT *
FROM tblActualWork [ActualWork]
JOIN tblRepair [Repair] ON ActualWork.intRepairID = Repair.intRepairID
JOIN tblRepairElement [RepairElement] ON Repair.intRepairElementID = RepairElement.intRepairElementID
JOIN tblRepairType [RepairType] ON Repair.intRepairTypeID = RepairType.intRepairTypeID
JOIN tblAsset [Asset] ON ActualWork.intAssetID = Asset.intAssetID
WHERE ActualWork.intAssetID IN (Select intAssetID From ##tblTempAssetFilter) AND Repair.intRepairTypeID IN (Select intRepairTypeID From ##tblTempRepairTypeFilter)
AND Repair.intRepairID IN (Select intRepairID From ##tblTempRepairFilter)
AND Repair.intRepairElementID IN (Select intRepairElementID From ##tblTempRepairElementFilter)

Any filtering must be based on the recordset filtered by temp table 1, which is a mandatory filter. Rows will always exist in this temp table.

Please help, not having much joy with this. Many thanks.

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I have 2 temporary tables from a previous operation, Tab1 and Tab2, with the same dimensions. How do I create a third table Tab3 with the same dimensions containing the the combined rows of the 2 previous tables? TIA!

Tab1
Col1 Col2 Col3
A1 B1 C1
A2 B2 C2

Tab2
Col1 Col2 Col3
X1 Y1 Z1
X2 Y2 Z2
X3 Y3 Z3

After the required sql operation I should have

Tab3
Col1 Col2 Col3
A1 B1 C1
A2 B2 C2
X1 Y1 Z1
X2 Y2 Z2
X3 Y3 Z3

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