Qualifying Table Variables
Jan 6, 2004
hi all!
I am using table variables instead of creating a temp table because it seems to be faster
But now I need qualify the table variable so I can join it with another table having a field with same name of a field from the table variable. U know if I can do that?
ex: with temp table
create table #tmp.... (F1...)
#tmp.f1
with table variable
declare @temp table(...
@table.f1 - can´t do it
the first question is if I can join the table variable with another table and how to do that qualifying the variable table, that is, putting the name of the var temp with the field, because the other table has a field with same name
thank to all and happiness for all 2004
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Jun 15, 2006
Greetings!
I'm hoping for a little insight for a novice.
Here's what I have:
1 table that looks like this...
Code:
rep_id answer
1 2
1 1
2 1
3 0
3 1
3 1
4 2
What I want is a recordset returned as ... (columns that tally the 1s and 2s respectively with the rep's id#)
Code:
rep_id total1 total2
1 1 1
2 1 0
3 2 0
4 0 1
What I can do so far is get individual recordsets returned for either total1 or total2 but not together.
Here's what I'm using for these...
Code:
SELECT rep_id, COUNT(answer) as total1
FROM myTable
WHERE answer = '1'
GROUP BY rep_id
and
Code:
SELECT rep_id, COUNT(answer) as total2
FROM myTable
WHERE answer = '2'
GROUP BY rep_id
So how do I form a SQL statement that will combine the 2 columns I have created into 1 joined by the rep_id?
To make it a little stickier there may be some nulls in the existing answers but hopefully that is not going to bung me up.
Any help will be thankfully received!!!
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Jan 13, 2006
Not sure if my description was accurate enough. Here is what I am trying to do. I am learning ASP.Net and am playing around with adding photo albums to my site. I would like a page listing all of the photo albums in a details view. For each album, I want to list the album name and then show a thumbnail of the FIRST photo in that album. When the user clicks on the thumbnail, he will be taken to the page showing all pictures in the album.
My problem is coming up with the SELECT statement to return each album and ONLY the first photo in each album. I have 2 tables: albums and photos. Albums has albumid, ownerid and albumname. Photos has photoid, albumid, photoname, and photothumburl.
I know I want to SELECT albums.albumid, albums.ownerid, albums.albumname, photo.photoid, photo.photothumburl FROM (I am going to mess up this syntax because I am not in front of my dev computer) albums INNER JOIN photos ON albums.albumid = photos.albumid....
But I do not know how to tell the SELECT to return only the photoid's that are the FIRST photo in the album. I can get it to work if I only use the photos table and just SELECT albumid, MIN(photoid) FROM Photos, but once I add in all the other items I want the query to return (album name, ownerid, photothumburl), I have to put them all as "Group By" and the resulting group of records I get includes all photos regardless of whether they are the first photo in the album or not. Hopefully that makes sense to people. I really would appreciate any help you can give me. So far this stuff is really fun...
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Apr 10, 2008
How do I use table names stored in variables in stored procedures?
Code Snippetif (select count(*) from @tablename) = 0 or (select count(*) from @tablename) = 1000000
I receive the error 'must declare table variable '@tablename''
I've looked into table variables and they are not what I would require to accomplish what is needed.
After browsing through the forums I believe I need to use dynamic sql particuarly involving sp_executesql. However, I am pretty new at sql and do not really understand how to use this and receive an output parameter from it(msdn kind of confuses me too). I am tryin got receive an integer count of the records from a certain table which can change to anything depending on what the user requires.
Code Snippet
if exists(Select * from sysobjects where name = @temptablename)
drop table @temptablename
It does not like the 'drop table @temptablename' part here. This probably wouldn't be an issue if I could get temporary tables to work, however when I use temporary tables i get invalid object '#temptable'.
Heres what the stored procedure does.
I duplicate a table that is going to be modified by using 'select into temptable'
I add the records required using 'Insert into temptable(Columns) Select(Columns)f rom TableA'
then I truncate the original table that is being modified and insert the temporary table into the original.
Heres the actual SQL query that produces the temporary table error.
Code Snippet
Select * into #temptableabcd from TableA
Insert into #temptableabcd(ColumnA, ColumnB,Field_01, Field_02)
SELECT ColumnA, ColumnB, Sum(ABC_01) as 'Field_01', Sum(ABC_02) as 'Field_02',
FROM TableB
where ColumnB = 003860
Group By ColumnA, ColumnB
TRUNCATE TABLE TableA
Insert into TableA(ColumnA, ColumnB,Field_01, Field_02)
Select ColumnA, ColumnB, Sum(Field_01) as 'Field_01', Sum('Field_02) as 'Field_02',
From #temptableabcd
Group by ColumnA, ColumnB
The above coding produces
Msg 208, Level 16, State 0, Line 1
Invalid object name '#temptableabcd'.
Why does this seem to work when I use an actual table? With an actual table the SQL runs smoothly, however that creates the table names as a variable problem from above. Is there certain limitation with temporary tables in stored procedures? How would I get the temporary table to work in this case if possible?
Thanks for the help.
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May 19, 2014
I am trying to update one table when records are inserted in another table.
I have added the following trigger to the table “ProdTr” and every time a record is added I want to update the field “Qty3” in the table “ActInf” with a value from the inserted record.
My problem appears to be that I am unable to fill the variables with values, and I cannot understand why it isn’t working, my code is:
ALTER trigger [dbo].[antall_liter] on [dbo].[ProdTr]
for insert
as
begin
declare @liter as decimal(28,6)
[Code] ....
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Feb 2, 2006
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Jul 20, 2005
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DELCARE @myVar char(20)
SET myVar = Request.Form("select2");
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Thanks
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May 4, 2007
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(
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GO
Thanks Yall
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Aug 23, 2004
Hello, all. I'm attempting to insert data into a table variable using dynamic SQL created at runtime.
However, with a Table variable, SQL server will not allow the EXEC method to be used in an INSERT statement.
How do I go about this?
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I am trying to add a variable to a temporary table name. Throughout a stored procedure, I do a lot with this table. I delete, insert, update, and query this table. Is there a way to do the following without having to set the entire 'select * from ...' line as a variable? Below is what I am trying to accomplish. It all works until the select * line. Is there a way to accomplish what I am trying to do below?
Declare @table varchar(255),
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Thanks,
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Query analyzer tells me that there's incorrect syntax near the keyword 'INTO'.
This seems fair enough to me as I assume it's trying to put the data into the variable rather than the table name which is held within the variable. Does any know how I can get around this?
Are there any alternative ways of copying the table structure (preferable without the data)?
BTW both variables are of type char(100)
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I have a table that has two columns POLICY_NUMBER and POLICY_TYPE
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123 1
123 1
123 1
567 2
567 2
789 1
789 1
345 1
345 1
345 1
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3 1
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Nov 6, 2014
Can we use tables variables in triggers... if yes, any example...
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Jul 20, 2005
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It's come up more than once for me, where I need to DECLARE and SET several SQL variables in a Stored Procedure where many of these values come from the same table record - what is the best method for doing this, where I don't have to resort to making a separate query for each value.
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What obvious bit of T-SQL am I missing?
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Short of testing the stored proc both ways, how do I know what to do?
declare @Temp table
or
create table #Temp
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TIA,
R2ro
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Jun 22, 2006
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quote:
DECLARE
@a_tmptbl varchar(15),
@a_fieldid1 varchar(15)
set @a_fieldid1 = 'newFieldid'
set @a_tmptbl = 'newTable'
create table @a_tmptbl ( @a_fieldid1 varchar(15), value float, counter INT);
insert into @a_tmptbl values ( "foobar", 21.76, 1);
select * from @a_tmptbl;
The error I am getting is:
quote:Server: Msg 170, Level 15, State 1, Line 8
Line 8: Incorrect syntax near '@a_tmptbl'.
Server: Msg 137, Level 15, State 1, Line 10
Must declare the variable '@a_tmptbl'.
Server: Msg 137, Level 15, State 1, Line 12
Must declare the variable '@a_tmptbl'.
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Hello,
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Nov 16, 2006
Hi,
What is the difference between CTE and table variables.
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Can you throw some light over here if you understand the two concepts clearly please?
Thanks
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Jan 11, 2006
I am using a table variable inside a stored procedure that I am trying to execute from an OLE Datasource task in IS. I know there was a problem doing this in DTS, which would result in an Invalid Pointer error. I am not getting that error, but I am getting an error that says "[OLE DB Source [55]] Error: A rowset based on the SQL command was not returned by the OLE DB provider." The stored procedure runs fine on it's own.
Any thoughts?
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