Can someone show me some C# code for detecting if a SQL row exists or not? This seems like a very typical action and I cannot for the life of me find a tutorial online that explains this step. In my code I'm either going to INSERT or UPDATE a record. I tried sending a SELECT command through a ExecuteNonQuery, but only got -1 as a response. Apparently ExecuteNonQuery does not work with SELECT. I then saw that T-SQL has an EXISTS keyword, but I cannot see anyway to use that from within C#.So...can anyone share the typical code they use to identify if a row exists or not within a database. I guess I was execting there to be some method available to do this sort of thing.
I'm familiar with how to check for the existence of a table before dropping it using the following command:
if exists (select * from dbo.sysobjects where id = object_id(N'[dbo].[xxx]') and OBJECTPROPERTY(id, N'IsUserTable') = 1) drop table [dbo].[xxx]
How does one check for the existence of a temp table (using # syntax) before dropping it? I've tried various flavors of this command and none work. One flavor is
use tempdb if exists (select * from dbo.sysobjects where id = object_id(N'[dbo].[#xxx]') and OBJECTPROPERTY(id, N'IsUserTable') = 1) drop table [dbo].[#xxx]
CREATE TABLE #xxx ( NumID INTEGER IDENTITY(1,1), Exhibitor_Id INTEGER NOT NULL, Company_Id INTEGER NOT NULL )
I have a situation where our stored procedure inserts records from table_1 to table_2 when they don't already exist (uses the EXIST statement) on that table. If table_1 contains multiple records that are the same, it appears after the 1st record has been inserted, it does not recognize it as being there when it checks the existence when attempting to insert record 2.
Here's an example of the script:
insert into table_2 (col1,col2,col3) select col1,col2,col3 from table_1 t1 where not exists (select '1' from table_2 t2 where t1.col1 = t2.col1 and t1.col2 = t2.col2 and t1.col3 = t2.col3)
Data from Table_1 -- Assume that table_2 does not contain these records
col1 col2 col3 AA 11 A1 AA 11 A1 BB 22 B2
All 3 records would be inserted to table_2 in this example.
OK. Here's my situation. I check for the existence of a dummy .txt file using a script. I send an e-mail if it does not exist and exit package. The .txt file only exists if another .xls file is present which I import. However, during the validation phase of the package, the package fails because the .xls file does not exist. Is there a way to bypass the validation step? The only solution I came up with is to have a two-step job. The first runs the file check step and sends the e-mail. The second attemps to run the package and fails. Not a very graceful exit.
Not played with SQL for a while and am a bit rusty so please excuse me if I sound like a demented idiot! )
It's for a data migration from something wierd to SQL, I just need to be able to advise whether a table is worth migrating or someone should manually enter the data (i.e. if only six random fields are populated in a table then get a secretary to enter it).
I was hoping someone might have already done this and have a query I can edit?!
As far as I can make out the query needs to loop through every table, loop through every row, check each field for an existance of data and output something useful.
I've stared at this for about 3 hours now and tried several different things and none work.....and it's doing my nut! (
While cleaning up some code, I ran across the following statement in a stored proc - the purpose of which is to determine if a table exists in the local database: SELECT * FROM dbo.sysobjects where id = object_id(N'[dbo].[XML_PRINTDATE]') and OBJECTPROPERTY(id, N'IsUserTable') = 1of course I removed it from the IF just for testing purposes, but my quandry is this... Why chose that select (converting table name to object ID) rather than just doing THIS:SELECT * FROM dbo.sysobjects where name = N'XML_PRINTDATE' and OBJECTPROPERTY(id, N'IsUserTable') = 1
I first thought it was to gain access to the "id" column value (and that may yet be the purpose of it), but the second code seems to work just peachy (I assume because the id column is present in the sysobjects table itself).
A follow-on question is this: When I try to do the same check from another server (i.e.SELECT * FROM APRECEIVE1.DailyProd.dbo.sysobjects where name = N'XML_PRINTDATE' and OBJECTPROPERTY(id, N'IsUserTable') = 1) it of course fails because OBJECTPROPERTY only looks for the id on the local database.
So, do I CARE if it is a user table? (I am reasonably sure it is, of course) and if so, is there a way to check on the remote server for the object type?
Bottom line is I Think I can just simplify things and check for the object name on the remote server, but just don't want to take away any "warm fuzzy feeling" generated by the original stored proc, if such a warm fuzzy is of any benefit (though don't get me started on the relativity of warm fuzzies, I wrote my Thesis on that ;) )
I have a parent package that calls a child package, when I run the parent package the child package picks up a variable value from the parent in a script task and runs fine, the problem I'm facing is when I run just the child package, the script task fails because it doesn't know about the parent variable. The dilemma I'm facing is in my child script task, if I add the parent variable to the ReadOnlyVariables list then the task fails because the parent variable doesn't exist when I just run the child. If I don't add the parent variable to the ReadOnlyVariabls list then if I try to use it then the task fails saying that the variable doesn't exist in the variables collection.
Is there a way to check for the existence of the parent variable, so when I just run the child package I don't get an error and I don't have to change my task every time I choose to run the child package only vs running the parent/child?
I am using a foreach file to loop through a folder and pick a file. Then populate a Sql table.
Now I want to check if the file is a mdb and then check if the mdb contains a table called "Customers". If any of these conditions fails, the file should be moved to the Error folder.
How do I do this? Please specify the components to use.
I wrote the below script to print all folders and files located in the share path. How to extend my script to mention by adding another column whether the file is a folder/file , sort of 0 or 1.
I downloaded Quest Software's freeware version ofComparison Suite. When I attempt to install, it tellsme that it requires .NET framework 1.1.4322. I alreadyhave .NET 2.0 installed (as part of the MS-SQL native client install)and I really don't want to mess that up.Is it *safe* to have the installer download/install .NET 1.1to coexist with 2.0? Is it likely to work?
Hi Friends,I have one table in the databse,i.e userTable with one field userNameIn my form I have one Label ,textbox for entering the userName and One button for submit,So I am entering the data into the table(userTable) after clicking on the submit buttonBut my problem is before entering the data into the table I want to find wheather the given data exits or notif its not exists the data has to insert into the table otherwise its has to display the message"the user is already existed"for this I wrote the code like this in C# public Boolean isUserExists() { SqlCommand cmduserName = new SqlCommand("select count(*) from userTable where userName= " + txtuserName.Text + ")", conn); SqlDataReader rdr = null; rdr = cmduserName.ExecuteReader(); conn.Open(); int count = 0; while (rdr.NextResult()) { count = rdr.GetInt32(1); } conn.Close(); if (count == 0) { return false; } else { return true; } protected void Button1_Click(object sender, EventArgs e) { if(isUserExists()) { Response.Write("Opps ! User already Exists"); } SqlCommand adapInsert = new SqlCommand("insert into userName values('" + txtuserName.Text + "')",conn); conn.Open(); adapInsert.ExecuteNonQuery(); conn.Close(); Response.Write("data inserted"); } is it write or not because I am not getting the output .please tell me any one where I have to change the code ThanksGeeta
We are currently running MS-SQL 6.5 and are getting new apps which require 7.0. The new apps will be on their own server(s). My question is - Can a PC run both the 6.5 client and the 7.0 client (simultaneously) to access both 6.5 and 7.0?
Does anyone know where to find the property that disables the broadcast of the sql server from the point where you do not see the server show up in the list when one goes to
"New SQL Server Registration" -> "..."
beside the "Server" field. The dialog itself is titled "Registered SQL Server Properties". Assume both SQL Servers are both behind the firewall.
How is it possible to test at the beginning of a stored procedure if acursor I want to declare already exists? (So I don't cause an error bydeclaring it).ThanksBruno
I'm looking for an efficient t-sql script to loop through all usertables in a db and determine/print the value of each row having adatetime field (including cases where there are multiple datetimefields per row)Help greatly appreciated..
I have a webpage where users can connect with other users by sending them a request. Sending the request just puts a row in a connect table that contains the users id, the targetusers id, a requesteddate, an accepted date and a disconnectdate (for the original requester to end the connection and a reject bit the the target can reject the request. Hoever I need to check to assure that the connect does nt already exist either as pending (requestdate is not null and accept date is null) or both dates are not null (connection already complete.).
ALTER PROCEDURE [dbo].[requestConnect] -- Add the parameters for the stored procedure here @requestor int, @requested int AS BEGIN -- SET NOCOUNT ON added to prevent extra result sets from interfering with SELECT statements.
I wanted to know how do I know or check that whether a column exists in a table. What function or method should I use to find out that a column has already exists in a table.
When I run a T-SQL script which i have written does not work. Here is how I have written:
IF Object_ID('ColumnA') IS NOT NULL ALTER TABLE [dbo].[Table1] DROP COLUMN [ColumnA] GO
SELECT dnn_Roles.RoleName, xyzUser.FirstName, xyzUser.LastName, xyzUser.Email, xyzRewardPoint.Points, xyzRewardPoint.RewardID FROM xyzRewardPoint INNER JOIN xyzUser ON xyzRewardPoint.UserID = xyzUser.UserId INNER JOIN dnn_UserRoles INNER JOIN dnn_Roles ON dnn_UserRoles.RoleID = dnn_Roles.RoleID ON xyzUser.ProviderId = dnn_UserRoles.UserID WHERE (dnn_UserRoles.RoleID = 3) OR (dnn_UserRoles.RoleID = 4) OR (dnn_UserRoles.RoleID = 6) ORDER BY dnn_UserRoles.RoleID
What I need is to extend this query to detect any users who exist in dnn_UserRoles.RoleID 3, 4 or 6 but do not have a RewardID value of '43' in the xyzRewardPoint table.
Apologies if this has been answered before, but the "Search" function doesn't seem to be working on these forums the last couple of days.
I'd just like to check if a table already exists before dropping it so that I can avoid an error if it doesn't exist. Doing a web search, I've tried along the lines of "If (object_id(sensor_stream) is not null) drop table sensor_stream" and "If exists (select * from sensor_stream) drop table sensor_stream"
In both of these cases I get the error: "There was an error parsing the query. [ Token line number = 1,Token line offset = 1,Token in error = if ]"
Sooooo... what is the standard way to check for existence of a table before dropping it? Someone help? This seems like it should be simple, but I can't figure it out.
Hello All, I'm trying to develop a stored procedure that would do one of TWO things: 1. Return a 'status' that a value does not exist, if I were to provide the parameter via an ASP.NET2.0 page 2. If it does exists, to return the row data associated with that value (id number) The stored procedure would search a SQL Server table within it self first. It that fails it would look at an Oracle table (work order table). And if that fails to return a 'row' to look through another Oracle table (work request table). If that doesn't occur, then it would throw the result as described in #2. If the result exists in one of the TWO Oracle tables it would then insert that row into the first SQL Server table that the stored procedure searched through AND would return the row set to the ASP.NET page. While all this is happening, I was hoping to get some insight as to how to create a "Please Wait..." feedback and then moving to the final result. Looking forward to the wise words of the many on this forum, as I have experienced in the past! :)
Check the field existence of a database table, if exist get the type, size, decimal ..etc attributes I need SP SP ( @Tablename varchar(30), @Fieldname varchar(30), @existance char(1) OUTPUT, @field_type varchar(30) OUTPUT, @field_size int OUTPUT, @field_decimal int OUTPUT ) as /* Below check the existance of a @Fieldname in given @Tablename */ /* And set the OUTPUT variables */
we tried out the following code in query analyser -
create procedure TrialProc
as
select * from sakjdhf
when we executed this piece of TSQL in query analyser, we expected it to give an error or warning that no object by the name of sakjdhf exists ( as actually there is no such table or view in the database ). however to our surprise we got "command completed successfully " !!
does this mean the SQL server does not check for necessary objects when creating a stored procedure ? or is there some setting that we missed out whihch is causing SQL server to overlook the error in the code ?
I've been matching some incoming contacts to existing contacts in a database and need to update, insert, or rematch based on the ifs below.
If name, phone, and email all provided for both, then use the highest Source. So if the Contact has a Source value of 5 and SourceContact has a ContactSource of 1, update Contact with SourceContact
If name, phone and email all provided, and source the same then update to new values.
If name and phone on SourceContact and name and Email on Contact then reset Contact_fk to -1 should not have matched, but should be an insert
If name and email on SourceContact and name and phone on Contact then reset Contact_fk to -1 should not have matched, but should be an insert
If name and phone on SourceContact and name and/or Phone is blank in Contact then update
If name and email on SourceContact and name and/or email is blank in Contact then update
If phone numbers can be different, just update record to SourceContact if it has a same or higher ContactSource
If email address do not match then set SourceContacts to -1 Contact_fk it was computed incorrectly. Both have a non blank email
If Contact_fk is 0 then it is a new contact and just insert it.
IF OBJECT_ID('dbo.SourceContact', 'U') IS NOT NULL DROP TABLE [dbo].[SourceContact]; CREATE TABLE [dbo].[SourceContact] ( [SourceContact_pk]INT IDENTITY(1,1) NOT NULL CONSTRAINT PK_SourceContact PRIMARY KEY CLUSTERED, [ContactLastName] VARCHAR(30) NOT NULL CONSTRAINT DF_SourceContact_ContactLastName DEFAULT (''), [ContactFirstName] VARCHAR(30) NOT NULL CONSTRAINT DF_SourceContact_ContactFirstName DEFAULT (''),
This function, F_TEMP_TABLE_EXISTS, checks for the existence of a temp table (## name or # name), and returns a 1 if it exists, and returns a 0 if it doesn't exist.
The script creates the function and tests it. The expected test results are also included.
This was tested with SQL 2000 only.
if objectproperty(object_id('dbo.F_TEMP_TABLE_EXISTS'),'IsScalarFunction') = 1 begin drop function dbo.F_TEMP_TABLE_EXISTS end go create function dbo.F_TEMP_TABLE_EXISTS ( @temp_table_name sysname ) returns int as /* Function: F_TEMP_TABLE_EXISTS
Checks for the existence of a temp table (## name or # name), and returns a 1 if it exists, and returns a 0 if it doesn't exist.
*/ begin
if exists ( select * from tempdb.dbo.sysobjects o where o.xtype in ('U')and o.id = object_id( N'tempdb..'+@temp_table_name ) ) begin return 1 end
return 0
end go print 'Create temp tables for testing' create table #temp (x int) go create table ##temp2 (x int) go print 'Test if temp tables exist'
select [Table Exists] = dbo.F_TEMP_TABLE_EXISTS ( NM ), [Table Name] = NM from ( select nm = '#temp' union all select nm = '##temp2' union all select nm = '##temp' union all select nm = '#temp2' ) a
print 'Check if table #temp exists'
if dbo.F_TEMP_TABLE_EXISTS ( '#temp' ) = 1 print '#temp exists' else print '#temp does not exist'
print 'Check if table ##temp4 exists' if dbo.F_TEMP_TABLE_EXISTS ( '##temp4' ) = 1 print '##temp4 exists' else print '##temp4 does not exist' go
-- Drop temp tables used for testing, -- after using function F_TEMP_TABLE_EXISTS -- to check if they exist.
if dbo.F_TEMP_TABLE_EXISTS ( '#temp' ) = 1 begin print 'drop table #temp' drop table #temp end
if dbo.F_TEMP_TABLE_EXISTS ( '##temp2' ) = 1 begin print 'drop table ##temp2' drop table ##temp2 end
Test Results:
Create temp tables for testing Test if temp tables exist Table Exists Table Name ------------ ---------- 1 #temp 1 ##temp2 0 ##temp 0 #temp2
(4 row(s) affected)
Check if table #temp exists #temp exists Check if table ##temp4 exists ##temp4 does not exist drop table #temp drop table ##temp2
Hi,I need to maintain both SQL Server 2000 and 2005 on my PC for supportpurposes. I am using the developer additions. After I installeverything (with no install errors) I can use SQL 2005 Mgt Studio fineuntil I bring up SQL 2000 Query Analyzer or Enterprise Mgr. After that,I cannot bring up SQL 2005 Mgt Studio. It get this message:Package 'Microsoft SQL Management Studio package' failed to loadI click OK, the message comes up again, I click OK again and then MgtStudio disappears.My default instance is under SQL 2000 and I created a named instanceunder SQL 2005 on my PC both with Local System Account.My order of installs was:1) SQL Server 2000 (Server tools)2) SQL Server 2000 SP43) SQL Server 2005 (DB Engine, Integration Services, and Workstationcomponents)I also have .NET 2005 Professional installed.The frustrating thing is I can find no log information anywhere --event log, under my Documents and Settings, or in the SQL Server 2005directories where it was installed.My guess is that when I used Query Analyzer it changed a settingsomewhere or prevented me from using Mgt Studio somehow, but I justcan't figure out what it did. I'd like to avoid a complete re-installwhere it may just happen again.Any help would be appreciated. Thanks much.Tom Vicker
I'm trying to figure out the best way to write a script to deploy environment variables to different servers. To create the variable I'm currently using catalog. create_environment_variable. I want to wrap that in an if not exist statement.I had thought about just blowing away all the variables and recreating them but I thought that wouldn't go over well in prod. I wasn't sure if by deleting the variable, references to the variable would be lost.
I have a data flow task inside a foreach loop container which will take multiple excel files and load into a sql table. Once all the excel files are loaded into the table, then at the end one of the column gets updated using execute sql task. Now I am trying to check for a file existence, if the file is not present in the folder then the data flow task should not be executed. Any help is greatly appreciated, I am thinking of using file system task for this, but not exactly sure. Thanks in advance.
