Check For Primary Key Before Inserting New Record
May 17, 2005
Hi,
Can someone please tell me the best practices for checking the primary key field before inserting a record into my database?
As an example I have created an asp.net page using VB with an SQL server database. The web page will just insert two fields into a table (Name & Surname into the Names table). The primary key or the Names table is "Name". When I click the Submit button I would like to check to ensure there is not a duplicate primary key. If there is return a user friendly message i.e. A record already exisits, if there no duplicate, add the record.
I guess I could use try, catch within the .APSX page or would a stored procedure be better?
Thanks
Brett
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Sep 7, 2006
hii I have to insert some data into a table from the webpage. For that I need to know the last occurred value in the primary key and increment this by one and then insert the new record into the table. I am working with SQL Server 2005. I am coding in VB and ASP.NET 2.0. How will I go about this?? Is there some easy way for me to knw the last value of the primary key n then insert the record. It would be great if I get the idea more clear with the help of some code... Thanks
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Apr 17, 2014
Is that possible to restrict inserting the record if record already exist in the table.
Scenario: query should be
We are inserting a bulk information of data, it should not insert the row if it already exist in the table. excluding that it should insert the other rows.
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Nov 14, 2007
Consider this scenario.
I have two database in the sql server and consider that i have a query which has 4 tables inner joined.
When i execute the query in the database1 , the query is returning rows, But when i execute the same query in the database2, the query is not retuning rows . I know that the
no rows are returned because of missing data in the database2. But have no idea how to trace what values are missing in the database2. Please note the tables is having a huge
list of records by which manually comparison is painfull. Please consider i dont have any background idea of the values in the tables but just using it. Any help would be
appericated.
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Jan 16, 2004
The Question is ...Is there a way or work around to inserting a blank values into a primary field PLZ HELP.
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Feb 16, 2006
I'm getting a foreign key error as well as Indentity Insert error when I'm trying to run a stored proc that inserts values from another table..help!!
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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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Nov 3, 2015
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.
[Code] ....
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Jun 4, 2008
Hello all.
OK i have script which is to be run on several databases. Within this script there are commands to create a primary key on a specific table. Can anyone tell me if it is possible to check if a specific primary key exists on a table?
Thanks people.
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Aug 28, 2015
I have a server that has several DBs .. some are log shipping(ls_) and others are not. The current TRAN backup script just does a:
select name from sys.databases
where name != 'ls_xxxx'
and name != 'ls_yyyyy'
Is there a way to check a status byte or something so I can remove the hard coded names?
select name from sys.sysdatabase
where status = 'I log ship' -- ;)
I checked several places, but found nothing. Finding other status like RECOVERING et al ... is easy
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Jul 26, 2003
Hi all,
1) a company is maintaining seperate Database(s) for each country
2) Invites the user regn from diff. country
3) How to check the Primary key constraint for each user user regn accross all the country databases Dynamically when registering.
4)ie. all users of that company, all over the world are given a unique ID.
5) How to ensure this in MS SQl SERVER 2000,or Oracle
pls HElp
Thanks in adv.
Tarriq
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Jul 23, 2005
I developed a console application that will continually check a messagequeue to watch for any incoming data that needs to be inserted into MSSQL database.What would be a low-cost method I could use inside this consoleapplication to make sure the MS SQL database is operational before Iperform the insert?
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Jan 29, 2005
I want to insert a new record into my db in asp.net. Im programming in vb and using an sql server database. i know this is a begginers question but that's exactly what i am. Thanks in advance
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Nov 26, 2007
Hi Friends,
I am Ravi, I need a help.
My case is like.. i need to upload data from csv file into sql server 2005 data table.
but before that I need to check integrity of data
for example:
let us say csv data is like
ISD CODE,STATE,NAME,QUALIFICATION
91,AP,KIRAN,MCA
01,MC,MIKE,MS
here i have to check that, wether there is an entry in ISD codes table for 91 and 01 (india and us)
similarly AP , MC (Andhra Pradesh and MISSICippi)
please suggest me a nice approach, no of records in ISD codes and States will 350-450 records.
thanks in advance
Ravi K
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Aug 12, 2014
I have the following objective:
1. I want to check a column to see if there are values (to Eliminate dups)
2. Once checked the values in a column, if not found insert the new value
Here is my code for this:
ALTER TRIGGER DUPLICATES ON AMGR_User_Fields_Tbl
-- When inserting or updating
AFTER INSERT, UPDATE AS
-- Declare the variables
DECLARE @AN varchar(200)
[Code] ....
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Oct 30, 2006
hey everyone,I have created two tables in an sql server database. I have a check box in the table 1, and when it is checked, I want to insert that particular record into table 2. (By the way I am using a datagrid) The problem is when I click the check on the particular record I want inserted, and click update, the system copies the record twice instead of once. When I look into table 2, I end up having two of the same records. Can anyone help me.
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Sep 8, 2007
I am simply trying to use SQLCommand in .net to insert a record into a SQL Server 2005 table. There are 2 fields being pulled from a user input for that could have no values selected. In this case I want to insert a null value into the record. I get an error that Null is no longer supported and that I should use System.DBNull, but that can't be used as an expression.
How do I do this?
Thank you in advance.
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Jan 8, 2008
Hi All, i am new to programming, in my application i want to insert a record in sql server database using Ado.net for that i used SqlConnection cn=new SqlConnection(ConfigurationManager.ConnectionStrings["constring"].ConnectionString); SqlCommand cmd; protected void btnInsert_Click(object sender, EventArgs e) { try { cmd = new SqlCommand("Insert into DeptInfo(deptid,deptname)values(" + TextBox1.Text + ",'" + TextBox2.Text + "')", cn); SqlDataAdapter da = new SqlDataAdapter(cmd); cn.Open(); cmd.ExecuteNonQuery(); cn.Close(); TextBox1.Text = ""; TextBox2.Text = ""; } catch(Exception ex) { }} But my requirement is when ever the Insert command is successfull it has to display some alert message(using java script) saying "RECORD INSERTED SUCCESSFULLY" if Record insertion fails it should display some alert message "INSERTING NEW RECORD FAILED" . Any help will be greatly appreciated Thanks,Vision.
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Oct 11, 2004
i am running a query from one of my asp.net pages. I then want the results which will be around 20 - 30 records to be inserted to a new table. How do I do this?
I get the records from my query but how would i insert more than one record to a new table?
thanks
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Nov 1, 2004
Is it possible to have sql server automatically record date and time (in a designated field)when a record is created in the db? This may seam basic but it has caused me a lot of grief.
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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
Mark :)
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Apr 16, 2007
Hi,
Any one can help me with the following requirement:-
. Checking the record if its lock before issues any statement
Any sample will be helpful
Best Regards
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Oct 1, 2007
Ok I know this might not be the most accurate place to post this but I know someone here has an answer for me on it.I need to get the product_ID of the new record that is created by this insert statement INSERTINTO products ( class_ID,category_ID,product_name,product_desc,product_image,product_dimension,product_o1,product_o2,product_o3,product_ac,product_ph,product_photo ) SELECT class_ID,category_ID,product_name,product_desc,product_image,product_dimension,product_o1,product_o2,product_o3,product_ac,product_ph,product_photo FROM productsWHERE product_ID = @productID
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Jan 12, 2008
Hi
I have a table in sql server with a numeric field as Primary Key. When i insert a new record i need that primary key increments automatic (like access auto increment) because i want avoid the possibility of duplicate Primary Keys.
Is that possible?
Thank you
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Feb 17, 2006
I'm performing an insert on a table that has a relationship, but I also want to update the other table that has a foreign key relationship. How do I go about this? Thanks :)
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Sep 29, 2006
Visual Basic 2005 Express:
I want to retrieve an SQL DataBase table record whose primary key is 4.
How do I read in that record and how do I pick up data from it?
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Feb 14, 2007
I can't seem to get this work. I'm using SQL2005
I want to check if a record exists before entering it. I just can't figure out how to check it before hand.
Thanks in advance. Protected Sub BTNCreateProdIDandName_Click(ByVal sender As Object, ByVal e As System.EventArgs) Handles BTNCreateProdIDandName.Click
' Define data objects
Dim conn As SqlConnection
Dim comm As SqlCommand
' Reads the connection string from Web.config
Dim connectionString As String = ConfigurationManager.ConnectionStrings("HbAdminMaintenance").ConnectionString
' Initialize connection
conn = New SqlConnection(connectionString)
' Check to see if the record exists
If
comm = New SqlCommand("EXISTS (SELECT (BuilderID, OptionNO FROM optionlist WHERE (BuilderID = @BuilderID) AND (OptionNO = @OptionNO)", conn)
Then
'if the record is exists display this message.
LBerror.Text = "This item already exists in your Option List."
Else
'If the record does not exist, add it. FYI - This part works fine by itself.
comm = New SqlCommand("INSERT INTO [OptionList] ([BuilderID], [OptionNO], [OptionName]) VALUES (@BuilderID, @OptionNO, @OptionName)", conn)
comm.Parameters.Add("@BuilderID", System.Data.SqlDbType.Int)
comm.Parameters("@BuilderID").Value = LBBuilderID.Text
comm.Parameters.Add("@OptionNO", System.Data.SqlDbType.NVarChar)
comm.Parameters("@OptionNO").Value = DDLProdID.SelectedItem.Value
comm.Parameters.Add("@OptionName", System.Data.SqlDbType.NVarChar)
comm.Parameters("@OptionName").Value = DDLProdname.SelectedItem.Value
LBerror.Text = DDLProdname.SelectedItem.Value & " was added to your Option List."
Try
'open connection
conn.Open()
'execute
comm.ExecuteNonQuery()
Catch
'Display error message
LBerror.Text = "There was an error adding this Option. Please try again."
Finally
'close connection
conn.Close()
End Try
End If
End Sub
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Jan 7, 2008
I am trying to insert a record into a sql server table from a textbox in a form but am getting this error
The name "textbox1value" is not permitted in this context. Valid expressions are constants, constant expressions, and (in some contexts) variables. Column names are not permitted.
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: The name "textbox1value" is not permitted in this context. Valid expressions are constants, constant expressions, and (in some contexts) variables. Column names are not permitted.Source Error:
Line 33: dim command1 as sqlcommand=new sqlcommand(q1,connection1)
Line 34: command1.connection.open()
Line 35: command1.executenonquery()
Line 36: command1.connection.close()
Line 37: end sub This code is right below. The sub called a() is the one with the problem.
<html> <head> <title> </title> <script language="vb" runat="server"> sub page_load(sender as object, e as eventargs) if not page.ispostback then binddata1() end if end sub sub binddata1() dim connection1 as new sqlconnection("server=111.111.11.11;uid=aa;pwd=bb;database=cc") const q as string="select dxid,code from tbltest where date_del is null order by code" dim command1 as new sqlcommand(q,connection1) dim dataadapter1 as new sqldataadapter() dataadapter1.selectcommand=command1 dim dataset1 as new dataset() dataadapter1.fill(dataset1) grid1.datasource=dataset1 grid1.databind() end sub
sub a(sender as object,e as eventargs)' response.write(textbox1.text) dim textbox1value as string textbox1value=textbox1.text dim connection1 as sqlconnection=new sqlconnection("server=111.111.11.11;uid=aa;pwd=bb;database=cc") const q1 as string="insert into tbltest(code,descriptor) values (textbox1value,'test')" dim command1 as sqlcommand=new sqlcommand(q1,connection1) command1.connection.open()
command1.executenonquery()
command1.connection.close() end sub </script> </head> <body> <form runat="server"> <asp:textbox id="textbox1" runat="server" /> <asp:button id="button1" text="click" onclick="a" runat="server" /> <asp:datagrid id="grid1" runat="server" /> </form> </body></html>
What am I doing wrong?
How can I get the insert query to put the value of textbox1.text into the column called code?
Sorry if I am not explaining things clearly. This is like a foreign language to me.
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Oct 24, 2000
Is there a way to test the integrity of a record which is about to be inserted in a database before doing so?
The goal is to prevent all kinds of runtime errors that will occur after the insertion, if the record breaks any of the database rules.
The solution should apply to a VBScript used inside a DTS package.
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Apr 25, 2007
SELECTIndustry,
100.0 * SUM(CASE when ceoischairman = 'yes' then 1 else 0 end) / COUNT(DISTINCT CompID) AS [YesPercent],
100.0 * SUM(CASE when ceoischairman = 'no' then 1 else 0 end) / COUNT(DISTINCT CompID) AS [NoPercent]
FROMTCompanies
GROUP BYIndustry
ORDER BYIndustry
This code above is working as I need it but I need to insert some additional functionality. Thanks
I need to add something like this:
IF YesPercent > NoPercent
UPDATE tableX SET CEOIsChairman='Yes' WHERE Industry='<the industry value being evaluated>'
Else If NoPercent > YesPercent
UPDATE tableX SET CEOIsChairman='No' WHERE Industry='<the industry value being evaluated>'
Else
UPDATE tableX SET CEOIsChairman='Equal' WHERE Industry='<the industry value being evaluated>'
End
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Jan 17, 2008
Hi All,
I'm using Microsoft SQL Server Management Studio with SQL Server 2005 (SP2).
I have not had much experience with t-SQL and iterative logic implementation through SQL, therefore I think my problem is fairly basic for most of the pros here.
Here it goes...
I have two tables at hand, TestTab1 and TestTab2.
TestTab1 contains two attributes (columns) namely account_name (nvarchar(50)) and entry_count (int). For all rows in TestTab1, account_name is unique, i.e. for each account_name there is only 1 row in TestTab1. This is my source table.
TestTab2 contains one attribute namely account_name (nvarchar(50)). This table is empty and is my destination table.
I need to insert X entries (rows) for each account_name into TestTab2 where X is the int value in entry_count againt each account_name in TestTab1.
In other words, I need to insert account_name into TestTab2 as many times as the number in entry_count indicates.
I tried reading through the documentation but the help was not friendly enough for me to understand how to implement this.
Looking forward to the pro support.
Thanks,
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Jun 15, 2007
Hey everybody!
How do i insert a carriage return at the end of an record that's being sent to a flat file? Currently, I get one long string, and would like for SSIS to put carriage returns at the end of each line.
Any ideas?
Thanks!
Jim Work
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