Hi guys,
What is this error
An attempt to attach an auto-named database for file C:inetpubwwwrootMediaApp_DataLibrary.mdf failed. A database with the same name exists, or specified file cannot be opened, or it is located on UNC share.
Greetings, I have just arrived back into the country (NZ) and back into ASP.NET.
I am having trouble with the following:An attempt to attach an auto-named database for file (file location).../Database.mdf failed. A database with the same name exists, or specified file cannot be opened, or it is located on UNC share.
It has only begun since i decided i wanted to use IIS, I realise VWD comes with its own localhost, but since it is only temporary, i wanted a permanent shortcut on my desktop to link to my intranet page.
Anyone have any ideas why i am getting the above error? have searched many places on the internet and not getting any closer.
Cheers ~ J
hi
Basically, I create a database with sql, then I delete it manually(not via sql statment. This is a problem which I realise. In fact, you can't delete the database because the VS 2005 still is using it) I run the same code again,
then it says the database still exists, even it is physically destroied.
------Here is the errors:
System.Data.SqlClient.SqlException: Database 'riskDatabase' already exists.
at System.Data.SqlClient.SqlConnection.OnError(SqlExc eption exception, Boolea
n breakConnection)
------The evidence that the database doesn't exist physically:
Unhandled Exception: System.Data.SqlClient.SqlException: Cannot open database "riskDatabase" requested by the login. The login failed.
------The code:
/*
* C# code to programmically create
* database and table. It also inserts
* data into the table.
*/
using System;
using System.Collections.Generic;
using System.Text;
using System.Configuration;
using System.Data;
using System.Data.SqlClient;
using System.IO;
namespace riskWizard
{
public class RiskWizard
{
// Sql
private string connectionString;
private SqlConnection connection;
private SqlCommand command;
// Database
private string databaseName;
private string currDatabasePath;
private string database_mdf;
private string database_ldf;
public RiskWizard(string databaseName, string currDatabasePath, string database_mdf, string database_ldf)
{
this.databaseName = databaseName;
this.currDatabasePath = currDatabasePath;
this.database_mdf = database_mdf;
this.database_ldf = database_ldf;
}
private void executeSql(string sql)
{
// Create a connection
connection = new SqlConnection(connectionString);
// Open the connection.
if (connection.State == ConnectionState.Open)
connection.Close();
connection.ConnectionString = connectionString;
connection.Open();
command = new SqlCommand(sql, connection);
try
{
command.ExecuteNonQuery();
}
catch (SqlException e)
{
Console.WriteLine(e.ToString());
}
}
public void createDatabase()
{
string database_data = databaseName + "_data";
string database_log = databaseName + "_log";
connectionString
= "Data Source=.\SQLExpress;Initial Catalog=;Integrated Security=SSPI;";
string sql = "CREATE DATABASE " + databaseName + " ON PRIMARY"
+ "(name=" + database_data + ",filename=" + database_mdf + ",size=3,"
+ "maxsize=5,filegrowth=10%)log on"
+ "(name=" + database_log + ",filename=" + database_ldf + ",size=3,"
+ "maxsize=20,filegrowth=1)";
executeSql(sql);
}
public void dropDatabase()
{
connectionString
= "Data Source=.\SQLExpress;Initial Catalog=" + databaseName + ";Integrated Security=SSPI;";
string sql = "DROP DATABASE " + databaseName;
executeSql(sql);
}
// Create table.
public void createTable(string tableName)
{
connectionString
= "Data Source=.\SQLExpress;Initial Catalog=" + databaseName + ";Integrated Security=SSPI;";
string sql = "CREATE TABLE " + tableName +
"(userId INTEGER IDENTITY(1, 1) CONSTRAINT PK_userID PRIMARY KEY," +
"name CHAR(50) NOT NULL, address CHAR(255) NOT NULL, employmentTitle TEXT NOT NULL)";
executeSql(sql);
}
// Insert data
public void insertData(string tableName)
{
string sql;
connectionString
= "Data Source=.\SQLExpress;Initial Catalog=" + databaseName + ";Integrated Security=SSPI;";
sql = "INSERT INTO " + tableName + "(userId, name, address, employmentTitle) " +
"VALUES (1001, 'Puneet Nehra', 'A 449 Sect 19, DELHI', 'project manager') ";
executeSql(sql);
sql = "INSERT INTO " + tableName + "(userId, name, address, employmentTitle) " +
"VALUES (1002, 'Anoop Singh', 'Lodi Road, DELHI', 'software admin') ";
executeSql(sql);
sql = "INSERT INTO " + tableName + "(userId, name, address, employmentTitle) " +
"VALUES (1003, 'Rakesh M', 'Nag Chowk, Jabalpur M.P.', 'tester') ";
executeSql(sql);
sql = "INSERT INTO " + tableName + "(userId, name, address, employmentTitle) " +
"VALUES (1004, 'Madan Kesh', '4th Street, Lane 3, DELHI', 'quality insurance mamager') ";
executeSql(sql);
}
public static void Main(String[] argv)
{
string databaseName = "riskDatabase";
string currDatabasePath = "E:\liveProgrammes\cSharpWorkplace\riskWizard\A pp_Data";
// Need to be more flexible.
string database_mdf = "'E:\liveProgrammes\cSharpWorkplace\riskWizard\ App_Data\riskDatabase.mdf'";
string database_ldf = "'E:\liveProgrammes\cSharpWorkplace\riskWizard\ App_Data\riskDatabase.ldf'";
RiskWizard riskWizard = new RiskWizard(databaseName, currDatabasePath, database_mdf, database_ldf);
riskWizard.createDatabase();
riskWizard.createTable("userTable");
riskWizard.insertData("userTable");
//riskWizard.dropDatabase();
}
}
}
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?
SELECT * FROM Customers WHERE ID ='1'
Ok so that's simple, but how can I return a true or false if '1' is a value that exists in the db?
thanks.
Hi,Is there a simple way to verify if a database exists?I'm writing a stored procedure that will accept a database name as an inputparameter,and create the database if it does't already exist.--Message posted via http://www.sqlmonster.com
View 2 Replies View RelatedI was able to get this code to work but now I get a SQL error if you try to submit the same information twice. How can I add a message saying that the "email" already exists in database without the SQL error? protected void Button1_Click1(object sender, EventArgs e) { SqlConnection conn = new SqlConnection("Data Source=TECATE;Initial Catalog=subscribe_mainSQL; User Id=maindb Password=123456; Integrated Security=SSPI"); SqlCommand cmd = new SqlCommand("INSERT INTO [main] (, [userid], [fname], [lname], [degree]) VALUES (@email, @userid, @fname, @lname, @degree)", conn); conn.Open(); cmd.Parameters.AddWithValue("@email", email.Text); cmd.Parameters.AddWithValue("@userid", uscid.Text); cmd.Parameters.AddWithValue("@fname", fname.Text); cmd.Parameters.AddWithValue("@lname", lname.Text); cmd.Parameters.AddWithValue("@degree", degree.SelectedItem.Value); int i = cmd.ExecuteNonQuery(); conn.Dispose(); }
View 5 Replies View RelatedI need to do some processing but only if a specific table 'table1' exists in the SQL Server database. How can I check if this 'table1' exists using either ADO.Net code or SQL Server query?
View 12 Replies View RelatedI would like to be able to check if a certain entry exists in a SQL table. Ideally, the output would be a boolean so I can use it in an IF statement which would tell it what to do depending on whether or not the entry exists. Thanks for anyone that helps. :)
View 6 Replies View RelatedHi all,
I have a table where I want to populate it with data (certain fields) from another table. But I only want to populate the table if there is data in a certain field in the table I wish to get the data from.
How exactly would I do this test? Would an I have to perform an IF statement to test if the field contains a value first?
Thanks
Tryst
I want to check to see if a database exists in SQL Server 2005 Express... using VB.NET (or C#)... Can not use the SQLConnection Object... because I get a Failed Login Attempt... regardless if the DB does not exist or if it is because the User Login is incorrect
Is there some way to check to see if the Database exists (is attached) to the SQL Server 2005 Express Engine?
ward0093
I know allot of folks are having this problem and I tried lots of things but nothing works. I understand the problem is coping the SQL Express on another server is the problem - I just not sure what to do?
Version Information: Microsoft .NET Framework Version:2.0.50727.42; ASP.NET Version:2.0.50727.42
This is the last statement on the Stack Trace:
SqlException (0x80131904): An attempt to attach an auto-named database for file e:wwwdata81d0493fwwwApp_DataTestDatabase.mdf failed. A database with the same name exists, or specified file cannot be opened, or it is located on UNC share.]
System.Data.SqlClient.SqlInternalConnection.OnError(SqlException exception, Boolean breakConnection) +735091
I checked my server forum and they said I had to name a database:
Example: Database=(unique name);
But this didn't work either.
I just tried a simple web project that has only one database and one table in SQL Express with one sqldatasource and one datagrid. It works fine on my pc but when I use the copy function in Visio Studio 2005 Pro - I can't run the site on the remote server: www.myjewelrydirect.com
I tried coping the database manually. I tried disconnecting the database before I copy it. Below is my connection statement:
<connectionStrings>
<add name="TestDB" connectionString="Data Source=.SQLEXPRESS;AttachDbFilename=|DataDirectory|TestDatabase.mdf;Integrated Security=True;User Instance=True"
providerName="System.Data.SqlClient" />
</connectionStrings>
With all the comments in these forums - this must be a bug.
I have been working on this problem for over 2 weeks - HELP!
hi. i'm building a news section for some friends of mine. i list all the news items on the main page in a gridview. i've made a custom edit linkbutton that sends the user to an edit page, passing the news id as a quarystring variable. on the edit page i first check if the querystring variable contains an id at all. if not, i redirect the user to the main page. if an id is passed with the querystring, i fetch the matching news item from the database and place it in a formview control for editing.so far, so good. but what if someone types a random id in the querystring? then the formview won't show up and i'd look like a fool. :) therefore, i need some kind of check to see if the id exists in the database. if not redirect the user back to the main page... so i started thinking: i could check the databsae in a page_load procedure. if all is well, then display the news item. since the formview is automatically filled with the correct data, does that mean that i call the database two times? i mean, one for checking if the news item exists, and one for filling the formview. logically, this would be a waste of resources.help is appreciated.
View 3 Replies View RelatedHi!
I've restored a backup from server A in server B. In server A I used to have a db_owner, called sitebase. After restoring the backup in server B, I created the user sitebase again and tried to grant him db_owner through Server Manager but I got the error: user or role already exists in the current database.
How can I avoid this situation and grant db_owner to him?
Thanks,
Fábio
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
Hi,
I'm using SQL Server 2005, and I would like to understand how to create and to drop a database without errors:
Infact, if I try to create a database that already exists, SQL Server throws the error "Impossible to create the database because it already exists", and if I try to drop a database that doesn't exist, SQL Server throws the error "Impossible to drop the database because it doesn't esist".
Before creating or dropping a database, I should control if it exists or not...
Is there a method to do that?
I found that such control for a table is the following one (in this case, I drop the table only if it exists):
if exists (select * from dbo.sysobjects where id = object_id(N'[dbo].[Table1]') and OBJECTPROPERTY(id, N'IsUserTable') = 1)
drop table [dbo].[Table1]
I tried to adapt the statement to the database case, modifying it as follows:
if exists (select * from dbo.sysobjects where id = object_id(N'[Database1]') and OBJECTPROPERTY(id, N'IsDatabase') = 1)
drop database [Database1]
but it didn't function (it was a blind attempt).
Can you suggest me a statement to do that?
Thank you very much
I have an error 14421 (database has restore threshold for 45 minutes and has not restored in more than "so many" minutes)firing for a database that no longer exists. How can I remove this alert? I have other log shipping plans that are running and so I can't delete the Log shipping alert job.
View 4 Replies View RelatedI used a backup copy of our production DB (residing in our prod machine) to do a database RESTORE to our test DB (residing in our test machine). This step was successful.
However when I tried to access the test DB via Peoplesoft application, I am unable to logon. Only then did I notice that all the users, with the exception of "sa", were gone.
When I attempted to add a user via Enterprise Manager's Action - Add Database User, I get the message, "Error 15023: User or role '%' already exists in the current database.
What's the best way to fix this without resorting to copying the source server's master database (If i do this, I risk clobbering some other DB's that are present in the target server but not in source server)?
Any help you can provide will be greatly appreciated!!!
Hello everyone,
I have been playing with a Standard Version of VS 2005 and SSE 2005 and I just cannot get these two to interact together well. I am sure it is a noob problem but I have seen this error addressed on this forum and I am just not getting it. Here is exactly what I am doing.
I want to create a database within SSE using the Management Studio. Then, I want to connect to it with VS2005. Both SSE and VS2005 are local. I just cant seem to get this to work.
I always seem to get this error "An attempt to attach an auto-named database for file C:Program FilesMicrosoft SQL ServerMSSQL.1MSSQLDataSecond.mdf failed. A database with the same name exists, or specified file cannot be opened, or it is located on UNC share."
One thing... I create the website with Location: HTTP. I don't even know anymore why I do this.. I think because I like to be able to pull up a browser and get to my app. Other than that I am doing nothing special. However, I get the above error when I hit F5 to run the app inside VS2005.
Is there someplace where a complete noob can find a thorough and simple covering of this? Again, I have read through some of the previous posts on this and I don't understand too many of them and it seems as if there are at least 13 causes of which I don't know which one I have. Help!
Thanks.
Is there a way to find active connection to a database so you don't have to wait for a restore or similar operation to fail. (Which take forever).?
Is there a SMO method or a transact SQL command or something that can be used in an application to detect active connections?
I don't want to have to wait forever to get a failure when you can't perform a operation that require that there be no active connection such detach a database. I want to be able to tell when I can perform a operation which requires no active connection and when I need to use a task without out dropping the connection like copying the schema using SMO methods.
However if there are no connection I can perform a detach copy and attach to create a new database which is considerable faster.
i have database which has 25 tables. all tables have productid column. i need to find total records for product id = 20003 from all the tables in database.
View 9 Replies View Related
Can't get over this error, and net searches reveal other postings similiar, but no answers.
SSIS database transfer task (with overwrite) from SQL 2k source to SQL 2k5 destination fails with:
Error: The Execute method on the task returned error code 0x80131500 (ERROR : errorCode=-1073548784 description=Executing the query "CREATE ROLE [RFRSH_USER] " failed with the following error: "User, group, or role 'RFRSH_USER' already exists in the current database.". Possible failure reasons: Problems with the query, "ResultSet" property not set correctly, parameters not set correctly, or connection not established correctly. helpFile= helpContext=0 idofInterfaceWithError={8BDFE893-E9D8-4D23-9739-DA807BCDC2AC}). The Execute method must succeed, and indicate the result using an "out" parameter.
The error seems the same regardless if the destination DB exists or not!
Anyone have a solution?
Good Afternoon.
I am trying to write a short application within which I would like to embed a SQL Server Express database, all of which would be deployed via ClickOnce through a web site. The installation process seems to be working without trouble, including installation of the .NET Framework 2.0 and SQL Server Express 2005.
When the application launches on the new machine, however, I get a big Microsoft .NET Framework "Unhandled exception" error dialog box that indicates the database already exists and that the database file could not be attached. I am working with a clean virtual machine that I know has never had the database installed on it.
I fear I am overlooking something quite straightforward, but since this is the first time I have ever attempted to build a data-bound application, I am not sure where I am going wrong.
Perhaps the source of the problem, or a related problem, might be revealed even when I run the application in debug mode from within Visual Studio. I can run the application once, but if I try to run it again, I get an error when I try to open the database connection that is similar in content (database already exists...could not attach). I can run the SSEUtil and detach the database and then run the application again in debug mode and it works no problem (the first time!).
Lastly, if I install the application on the machine on which it was developed and make sure the database is detached, it will run without any trouble (even repeatedly). But, on a new blank machine, there is no database listed that matches my database name, so I cannot try to detach anything!?
My apologies for such a novice question!
Sean
I have a SSIS package where im importing data from MS access database file .MDB. I chose Microsoft JET 4.0 OLEDB provider. When i select a table and preview the data, im getting the below error.
Error at Data Flow Task [OLE DB Source [1]]: SSIS Error Code DTS_E_OLEDBERROR. An OLE DB error has occurred. Error code: 0x80040E09.
Error at Data Flow Task [OLE DB Source [1]]: Opening a rowset for "_tblDateDateEarnedMismatch" failed. Check that the object exists in the database.
But it is working for the other tables .
the subject pretty much says it all, I want to be able to do the following in in VB.net code):
{[If [table with this name] already exists [in this sql database] then [ don't create another one] else [create it and populate it with these values]}
How would I do this?
Hi there
I sorry if I have placed this query in the wrong place.
I'm getting to grips with ASP.net 2, slowly but surely!
When i try to access my site which uses a Sql Server 2005 express DB i am receiving the following error:
Server Error in '/jarebu/site1' Application.
Database 'd:hostingmemberasangaApp_DataASPNETDB.mdf' already exists.Could not attach file 'd:hostingmemberjarebusite1App_DataASPNETDB.MDF' as database 'ASPNETDB'.
Description: An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code. Exception Details: System.Data.SqlClient.SqlException: Database 'd:hostingmemberasangaApp_DataASPNETDB.mdf' already exists.Could not attach file 'd:hostingmemberjarebusite1App_DataASPNETDB.MDF' as database 'ASPNETDB'.Source Error:
An unhandled exception was generated during the execution of the current web request. Information regarding the origin and location of the exception can be identified using the exception stack trace below. Stack Trace:
[SqlException (0x80131904): Database 'd:hostingmemberasangaApp_DataASPNETDB.mdf' already exists.
Could not attach file 'd:hostingmemberjarebusite1App_DataASPNETDB.MDF' as database 'ASPNETDB'.]
System.Data.SqlClient.SqlInternalConnection.OnError(SqlException exception, Boolean breakConnection) +735075
System.Data.SqlClient.TdsParser.ThrowExceptionAndWarning(TdsParserStateObject stateObj) +188
System.Data.SqlClient.TdsParser.Run(RunBehavior runBehavior, SqlCommand cmdHandler, SqlDataReader dataStream, BulkCopySimpleResultSet bulkCopyHandler, TdsParserStateObject stateObj) +1838
System.Data.SqlClient.SqlInternalConnectionTds.CompleteLogin(Boolean enlistOK) +33
System.Data.SqlClient.SqlInternalConnectionTds.OpenLoginEnlist(SqlConnection owningObject, SqlConnectionString connectionOptions, String newPassword, Boolean redirectedUserInstance) +628
System.Data.SqlClient.SqlInternalConnectionTds..ctor(DbConnectionPoolIdentity identity, SqlConnectionString connectionOptions, Object providerInfo, String newPassword, SqlConnection owningObject, Boolean redirectedUserInstance) +170
System.Data.SqlClient.SqlConnectionFactory.CreateConnection(DbConnectionOptions options, Object poolGroupProviderInfo, DbConnectionPool pool, DbConnection owningConnection) +359
System.Data.ProviderBase.DbConnectionFactory.CreatePooledConnection(DbConnection owningConnection, DbConnectionPool pool, DbConnectionOptions options) +28
System.Data.ProviderBase.DbConnectionPool.CreateObject(DbConnection owningObject) +424
System.Data.ProviderBase.DbConnectionPool.UserCreateRequest(DbConnection owningObject) +66
System.Data.ProviderBase.DbConnectionPool.GetConnection(DbConnection owningObject) +496
System.Data.ProviderBase.DbConnectionFactory.GetConnection(DbConnection owningConnection) +82
System.Data.ProviderBase.DbConnectionClosed.OpenConnection(DbConnection outerConnection, DbConnectionFactory connectionFactory) +105
System.Data.SqlClient.SqlConnection.Open() +111
System.Data.Common.DbDataAdapter.FillInternal(DataSet dataset, DataTable[] datatables, Int32 startRecord, Int32 maxRecords, String srcTable, IDbCommand command, CommandBehavior behavior) +121
System.Data.Common.DbDataAdapter.Fill(DataSet dataSet, Int32 startRecord, Int32 maxRecords, String srcTable, IDbCommand command, CommandBehavior behavior) +137
System.Data.Common.DbDataAdapter.Fill(DataSet dataSet, String srcTable) +83
System.Web.UI.WebControls.SqlDataSourceView.ExecuteSelect(DataSourceSelectArguments arguments) +1770
System.Web.UI.DataSourceView.Select(DataSourceSelectArguments arguments, DataSourceViewSelectCallback callback) +17
System.Web.UI.WebControls.DataBoundControl.PerformSelect() +149
System.Web.UI.WebControls.BaseDataBoundControl.DataBind() +70
System.Web.UI.WebControls.GridView.DataBind() +4
System.Web.UI.WebControls.BaseDataBoundControl.EnsureDataBound() +82
System.Web.UI.WebControls.CompositeDataBoundControl.CreateChildControls() +69
System.Web.UI.Control.EnsureChildControls() +87
System.Web.UI.Control.PreRenderRecursiveInternal() +41
System.Web.UI.Control.PreRenderRecursiveInternal() +161
System.Web.UI.Control.PreRenderRecursiveInternal() +161
System.Web.UI.Control.PreRenderRecursiveInternal() +161
System.Web.UI.Control.PreRenderRecursiveInternal() +161
System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) +1360
Version Information: Microsoft .NET Framework Version:2.0.50727.42; ASP.NET Version:2.0.50727.210
This is the connection string that I am using:
<connectionStrings>
<add name="ConnectionString" connectionString="Data Source=.SQLEXPRESS;AttachDbFilename=|DataDirectory|ASPNETDB.MDF;Integrated Security=True;Initial Catalog=ASPNETDB;User Instance=True" providerName="System.Data.SqlClient"/>
</connectionStrings>
The database is definitly in the folder that the error message relates to.
What I'm finding confusing is that the connection string seems to be finding "aranga"s database.
Is it something daft?
Many thanks.
James
Hi,
This is on Sybase but I'm guessing that the same situation would happen on SQL Server. (Please confirm if you know).
I'm looking at these new databases and I'm seeing code similar to this all over the place:
if not exists (select 1 from dbo.t1 where f1 = @p1)
begin
select @errno = @errno | 1
end
There's a unique clustered in dex on t1.f1.
The execution plan shows this for this statement:
FROM TABLE
dbo.t1
EXISTS TABLE : nested iteration.
Table Scan.
Forward scan.
Positioning at start of table.
It's not using my index!!!!!
It seems to be the case with EXISTS statements. Can anybody confirm?
I also hinted to use the index but it still didn't use it.
If the existence check really doesn't use the index, what's a good code alternative to this check?
I did this and it's working great but I wonder if there's a better alternative. I don't really like doing the SET ROWCOUNT 1 and then SET ROWCOUNT 0 thing. SELECT TOP 1 won't work on Sybase, :-(.
SET ROWCOUNT 1
SELECT @cnt = (SELECT 1 FROM dbo.t1 (index ix01)
WHERE f1 = @p1
)
SET ROWCOUNT 0
Appreciate your help.
Hello,
I am trying to create a table if one with the same name does not exists. My code is:
Dim connectionString As String = "Data Source=.SQLEXPRESS;AttachDbFilename=|DataDirectory|PensionDistrict4.mdf;Integrated Security=True;User Instance=True"
Dim sqlConnection As SqlConnection = New SqlConnection(connectionString)
Dim newTable As String = "CREATE TABLE [" + titleString + "Comments" + "] (ID int NOT NULL PRIMARY KEY IDENTITY, Title varchar(100) NOT NULL, Name varchar(100) NOT NULL, Comment varchar(MAX) NOT NULL, Date datetime NOT NULL)"
sqlConnection.Open()
Dim sqlExists As String = "IF EXISTS (SELECT * FROM PensionDistrict4 WHERE name = '" + titleString + "Comments" + "')"
Dim sqlCommand As New SqlCommand(newTable, sqlConnection)
If sqlExists = True Then
sqlCommand.Cancel()
Else
sqlCommand.ExecuteNonQuery()
sqlConnection.Close()
End If
I keep getting a "Input String was incorrect format" for sqlExists? I am new to Transact-SQL statements, any help would be appreciated.
Thanks Matt
ok i have 2 tables---one table is name CourseInformation with a field named Instructor and the data in there looks like this 'John Doe'.
My other table Instructors has 3 fields InstructorName, LastName, FirstName.
I am grabbing the Instructor field from CourseInformation and breaking up the names and inserting them into my instructors table as follows..
Insert into Instructors(InstructorName, LastName, FirstName)
(Select Distinct
ltrim(SUBSTRING(Instructor,CHARINDEX(' ',Instructor)+1,len(Instructor)))+', '+
SUBSTRING(Instructor,1,CHARINDEX(' ',Instructor)-1),
ltrim(SUBSTRING(Instructor,CHARINDEX(' ',Instructor)+1,len(Instructor))) as LName,
SUBSTRING(Instructor,1,CHARINDEX(' ',Instructor)-1) as FNamefrom CourseInformation
where NOT EXISTS(Select * from instructors where LastName = LName and FirstName = FName)
AND Instructor is not null)
Only problem is, I cant get the where not exists clause to work right(of course that wont work what i have cuz the LName and FName columns dont exist, i just did that for demo purposes). I dont want duplicate instructors in there..how can i accomplish this..is there a better way to rewrite my query? Any help is appreciated.
HI All,Which is best among the two 1) NOT IN or 2) NOT EXISTS .If the query is Select col1 from tab1 where col2 NOT IN (Select col 3 from tab2 where cl3=0) OR Select col1 from tab1 where col2 NOT EXISTS (Select col 3 from tab2 where cl3=0)
View 2 Replies View RelatedHi,
I have a question on the if not exists. Can you do something like this? If request not exists in table one then insert values into table two?
Thank you in advance,
Anne
Hi,
Is there any way to check whether a column is there in the table, if it is there i need to drop it through script.
i'm looking for the script, something like this..
if exists (select * from dbo.sysobjects where id = object_id(N'[dbo].[FK_Tbl_Product_Tbl_Products]') and OBJECTPROPERTY(id, N'IsForeignKey') = 1)
ALTER TABLE [dbo].[Tbl_Product] DROP CONSTRAINT FK_Tbl_Product_Tbl_Products
GO
In the same way i need to check for a column and drop it through script.
Any help would be greatly appreciated.
Thanks in advance.
hi guys! is there anyway to retrieve the row from the result of EXISTS function aside from using the code below?
if EXISTS (select * from rcps_useraccount where User_login = 'daimous')
BEGIN
select * from rcps_useraccount where User_login = 'daimous'
END
Im having a problem with the following can anyone spot how i can fix it? I dont think it likes the begin statement but without it, it has a declare issue.
IF EXISTS (SELECT 1
FROM snapevent.INFORMATION_SCHEMA.TABLES
WHERE TABLE_TYPE='BASE TABLE'
AND TABLE_NAME='FastEp_Snap_OD_Acc' + preports.dbo.f_filedate(getdate())
begin
declare @CMD nvarchar(300)
Set @CMD = 'drop table Snap_OD_Acc_' + preports.dbo.f_filedate(getdate())
--print @CMD
exec (@CMD)
end