MS SQL Server :: How To Check If A Temporary Table Exists?

Check If Temporary Table Exists

Oct 5, 2006

Hello.

How can I check if a temporary table exists in the current context?

With normal tables I'd do a

EXISTS ( SELECT name FROM sysobjects

WHERE name='myTableName' AND type='U')

However, I can't do that with a temporary table. I'd have to go look at the sysobjects table in the tempdb database.

The problem is that for temporary tables, a suffix is added to the name to make it unique for each scope. I can't change the WHERE clause to name LIKE 'myTableName%' because this would return true if a temporary table with the same name exists in a different scope.

Any ideas?

Carlos

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Jun 13, 2008

I am trying
IF OBJECT_ID(''tempdb..#tempTable.Column'') IS NOT NULL

But its returning me a null every time. Is there any other way to check if column exists in temporary table.

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Is It Possible To Check If A Local Temporary Table Exists ?

Mar 10, 2008

It is possible for global temporary tables, but for local, it is said that the names(in the tempdb) change each time the table is created, so i am not sure if there is a way to check it.

Thanks

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Apr 15, 2004

Hi,

How can I verify if a temporary table called #X, for example, exists in database?

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Jan 17, 2008

Hi all,I am in the process of creating a page that checks to see if a particular user exists in the database and if it does then send to welcome.aspx if not then accessdenied.aspx. The userid is requested from the query string.I have done some research and cannot find anything directly related, I have tried to add bits of code into what i think is the right place but I dont think what i am doing is correct. Can someone help and show me where my code is going wrong? Also is there a better/more efficient way to do what I am doing?Thanks in advance. default.aspx.csusing System;using System.Data;using System.Data.SqlClient;using System.Configuration;using System.Web;using System.Web.Security;using System.Web.UI;using System.Web.UI.WebControls;using System.Web.UI.WebControls.WebParts;using System.Web.UI.HtmlControls;public partial class _Default : System.Web.UI.Page{ protected void Page_Load(object sender, EventArgs e) { string UserID = Request.QueryString["uid"]; //string TransferPage; if (UserID != null) { //initiate connection to db SqlConnection objConnect = new SqlConnection(System.Configuration.ConfigurationManager.ConnectionStrings["MyConnection"].ConnectionString); string sql = "SELECT COUNT(*) FROM members WHERE UserID = '" + UserID + "'"; SqlCommand query = new SqlCommand(cmd, test); int count = (int)query.ExecuteScalar(); int aantal = -1; // some default value if can't insert record if (count == 0) // no existing record for username { Server.Transfer("accessdenied.aspx"); } else { Session["UID"] = UserID; Server.Transfer("welcome.aspx"); } } }}

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Check If The Table Exists

May 20, 2008

Hi,

This my first time using the link server to read the files directly from within SQL2005, so issues the following link:-

EXEC sp_addlinkedserver
@server = N'MYVFPSERVER', -- Your linked server name here
@srvproduct=N'Visual FoxPro 9', -- can be anything
@provider=N'VFPOLEDB',
@datasrc=N'"C:PROGRAM FILESMICROSOFT VISUAL FOXPRO 9Samplesdata estdata.dbc"'

After that i can open query and do the import issues, but how can check if the table exists before issues the query.

Best regards

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Sep 14, 2006

What’s the easiest way to check if a single value exists in a table column? I’m building a simple login page, and I want to get the username and check if it exists in my Users table. Here’s my SQL: SELECT UserID FROM UsersWHERE UserID = "admin" Could someone give me code to check for “admin” in my UserID column? Here’s some code I tried, using my SqlDataSource, but it returns an error “Could not load type 'System.Data.OleDb'” protected void Button1_Click(object sender, EventArgs e) { // Retreive the results from the SqlDataSource as a DataReader OleDbDataReader reader = (OleDbDataReader) SqlDataSource1.Select(DataSourceSelectArguments.Empty); // Read in the value if (reader.Read()) { } // Close the reader reader.Close(); } I don’t have to use the SqlDataSource, but originally thought it might be easier. I know how to use SqlDataSource to fill a whole GridView but this is different.

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Jun 17, 2008

Basically, i am still relatively new to ASP.net and SQL. And i have the following query.
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I need to check via our staff table, which people have had a skill entered for them. And then produce a report on who has not had a skill entered for them.
This table has a serial of the user column aswell which is unique.
If there is more information that i can give you to assist me, please ask me.
You help would be greatly appreciated.

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Apr 10, 2008

Hi there,
I want to create an SQL Function that checks if a table exists and returns true or false. I will pass this function a paramter (say @COMPANYID) e.g.

if exists (select * from dbo.sysobjects where id = object_id(N'[dbo].[tblmyTableName_' + @COMPANYID) and OBJECTPROPERTY(id, N'IsUserTable') = 1)

how would I write this so the query is dynamically executed and I can get a value of true or false back?

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May 9, 2007

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May 29, 2006

hi,

I want to know through applicaiton how to check whether the Server named"Myserver" is Exists with Database named "MyDatabase" with Tables named ('Table1','Table2','Table3').

For any Database like (MS Access, Oracle, MS SQL-Server,MySQL)..

Please help me.....

thank's in advance.......

Paresh Patel.

Paresh.onmail@hotmail.com

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Apr 17, 2007

I am writing my first SSIS task. I have an MS Access database and I'm moving the contents of each table into a like-named SQL Server database. The task is working properly except for one step.

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thanks,

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May 3, 2006

Hello,

I'm SQL Server 2005 newbie, could you be so kind and help me how to write the most efficient way stored procedure, which checks by PK if specified row exists, then updating the row, otherwise inserting new one.

Thank you for your kind help.

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Feb 1, 2007

Hello,I created the following SQL script to check if a record exists:IF (EXISTS (SELECT LevelName FROM dbo.by27_Levels WHERE LOWER(@LevelName) = LOWER(LevelName))) Return (1)ELSE Return (0)And I also found in a web page another solution:IF EXISTS(SELECT 1 FROM TABLENAME WHERE LevelName=@LevelName) SELECT 1ELSE SELECT 0- Which approach should I use?- Why "SELECT 1 FROM"?- And when should I use SELECT or RETURN?All I need is to know if the record exists ... nothing else.I will use this procedure on an ASP.NET 2.0 / C# web site.I am not sure if this important but anyway ...Thank You,Miguel

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Dec 24, 2007

Hi,
I was wondering if someone can help.
In vb.net what is the best way to check if a record exists if you are using an sql data reader?
For my application I need to display a button control (make it visible on the page) if a record is available after executing my sql select statement.
cheers
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Jan 27, 2008

Does anybody can tell me how to check if cursor exists ?
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I want to destroy the cursor when error occurred and it jumps into "catch" block.
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Mar 18, 2006

Hi!

I have created a formview which I among other things uses to insert new values into a database. What I want to check is if the primary key which is put into the form already exists in the db. If it is I want to get a message to my web page, if not the data can be inserted.

How can I do this?

And if the only way to control this is to create a stored procedure. How do I write such a proc?

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Oct 7, 2003

Is there is a piece for code ot sample code that can let me check if a file exists? Has any one done this before?

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Feb 25, 2004

Hi there,

I am quite new to SQL Server and am having a bit of trouble.

I have created a linked server with the datasource an excel spreadsheet.

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Can anyone help, its driving me bananas!

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May 11, 2004

I declare a cusror named crInv inside a loop.
Since I open this cursor a lot of times I want to check if is already opened.
I try to use the Cursor_status function but it always returns -3.
The syntax is:

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SELECT Val1, Val2 FROM TABLE1 WHERE Val3=450

If Cursor_Status('local','crInv')>0 BEGIN
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This code is inside a loop.
If I PRINT Cursor_Status('local','crInv') before and after the DECLARE statement it always returns -3.
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Best regards,
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Jun 5, 2008

Hello all.

Can anyone tell me how to go about establishing if a particular view exists on a table?

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Dec 9, 2006

Hi,

I'm wondering is there a command that I can use to check if a certain value exists in the database? Something that returns true or false perhaps?

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thanks.

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Mar 19, 2007

Hello all.

Can anyone advise me how to check to see if a particual triggers exists through a SQL script?

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Jul 25, 2006

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Aug 21, 2006

In SSIS, I need an easy way to see if a file exists, and if not wait for it until a timeout period expires. Here are the options I've discovered, along with the issues I've had:

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This was my first attempt. The task works great, BUT only detects when there is a change on the file. If the file already exists, it keeps waiting which is not the behavior I need.
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Feb 5, 2007

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if No,

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Dec 8, 2006

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Jun 4, 2008

Hello all.

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Mar 14, 2007

Hi All.

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Nov 26, 2007

What is the best way to check for an existing table in a db (i.e. check to be performed when creating a table)
I have came accross the following:

Code Block

IF EXISTS (SELECT 1 FROM INFORMATION_SCHEMA.TABLES WHERE TABLE_TYPE='BASE TABLE' AND TABLE_NAME='someTable')

and

Code Block
if not exists (select * from dbo.sysobjects where id = object_id('[someUser].[someTable]') and OBJECTPROPERTY(id, 'IsUserTable') = 1)

Note I want to work with tables that can have any name (unicode chars accepted);

I realise that INFORMATION_SCHEMA.TABLES is a view, and views are generally preffered, but why then does enterprise manager create the SQL found in the second example?

If anyone could explain what is best practice, it would be much appreciated,

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