I have a table with a large number of records that I need to delete, before attempt to perform the delete I also archived the records to another table.
So I need to delete all of these selected records stored in the archive table from the main table. I can now reference all the records that qualify for the delete in the main table by performing a join on the archive table like so:
select * from my_main_table a
join my_archive_table b
on a.distinct_id=b.distinct_id
and a.surrogate_key=b.surrogate_key
and a.identifier=b.indentifier
So all the records check out to be the ones I'd like to perform a delete on but I just can't figure out how to perform a delete of the records with little or no change to the existing query.
Obviously something like this won't work:
delete from my_main_table a
join my_archive_table b
on a.distinct_id=b.distinct_id
and a.surrogate_key=b.surrogate_key
and a.identifier=b.indentifier
Though it would be nice if it did.:D
So my question is how would I use the existing query with some modification to delete only the records that this query returns. I've tried selection of records in the main table based on the existing records in the archive table but it can return a higher number of records than what I know is expected. I actually need the join specified to be in place to do it.
Thanks in advance for you help.SQL Server 2000I have a complex join, but a simple example will do the trick so...table1 (placement records, possibly many per case,highest ID beingmost recent)----------placementID(pk) * CaseID(fk) * OrganizationID(fk) * Name * Numbertable2 (Organizations Table, Many Placements can be at 1 organization)----------OrganizationID(pk) * OrgName * OrgTypetable 3(Case Table, each Case can have many placements)----------CaseID(pk) * StaffName * CreationDatenow my query...SELECT t1.placementID,t1.caseID,t2.OrgNameFROM table1 as t1INNER JOIN table2 as t2 on t2.OrganizationID = t1.OrganizationIDWHERE exists (select distinct max(placementID),CaseIDfrom t1 group by caseID)GROUP BY t2.OrgName,t1.PlacementID,t1.CaseIDmy results-------------placementID CaseID OrgName1 1 oneOrg2 1 two org3 1 three org4 2 another org5 3 yet another orgmy desired results------------------PlacementID CaseID OrgName3 1 three org4 2 another org5 3 yet another orgas you can see i get all records, but what i want is to see only thelast placementID for each case so i dont want duplicate caseID but Ido need the orgName, and yes the query works correctly without the orgname but as soon as i add orgName to the select statement I getduplicate CaseID's, How do i eliminate duplicate CaseID's and get onlythe MAX(placementID) for each Case and the OrgNameplease advise, getting desperate.thanks again so much for the help
I'm trying to clean up a database design and I'm in a situation to where two tables need a FK but since it didn't exist before there are orphaned records.
Tables are:
Brokers and it's PK is BID
The 2nd table is Broker_Rates which also has a BID table.
I'm trying to figure out a t-sql statement that will parse through all the recrods in the Broker_Rates table and delete the record if there isn't a match for the BID record in the brokers table.
I know this isn't correct syntax but should hopefully clear up what I'm asking
Hi All,I have a table in SQL Server 2000 that contains several million memberids. Some of these member ids are duplicated in the table, and eachrecord is tagged with a 1 or a 2 in [recsrc] to indicate where theycame from.I want to remove all member ids records from the table that have arecsrc of 1 where the same member id also exists in the table with arecsrc of 2.So, if the member id has a recsrc of 1, and no other record exists inthe table with the same member id and a recsrc of 2, I want it leftuntouched.So, in a theortetical dataset of member id and recsrc:0001, 10002, 20001, 20003, 10004, 2I am looking to only delete the first record, because it has a recsrcof 1 and there is another record in the table with the same member idand a recsrc of 2.I'd very much appreciate it if someone could help me achieve this!Much warmth,Murray
How can we insert multiple records in a OLEDB destination table for each entry from the source table. To be more clear, for every record from source we need to insert some 'n' number of records into the destination table. this 'n' changes depending on the record. how is this achieved.
How can i delete a record from a table . table contains approx 3 million data and when i execute a query for delete it give error message from transaction log space problem. Is there any way to stop the log in transaction log and delete the record.
whats the best way to delete a parent record? for now what i am doing is to have a special delete page (means not DetailsView/GridView) just to delete parent records so user can see what child records will be deleted too. is the a better way?my code below: The T-SQL Stored ProcedureALTER PROCEDURE dbo.DeleteInventory ( @InventoryID int ) AS DELETE FROM Booking WHERE InventoryID = @InventoryID
DELETE FROM Inventory WHERE InventoryID = @InventoryID The code in the Code Behind to execute when a button(delete) click Try Dim temp As Integer = SqlDataSource4.Delete If temp > 0 Then lblDeleteDtatus.ForeColor = Drawing.Color.Blue lblDeleteDtatus.Text = temp & " Records/Rows Deleted." Else lblDeleteDtatus.ForeColor = Drawing.Color.Orange lblDeleteDtatus.Text = "No records Deleted!" End If Catch ex As Exception lblDeleteDtatus.ForeColor = Drawing.Color.Red lblDeleteDtatus.Text = "An Error Occured.<br />" & ex.Message.ToString End Try any better methods anyone wants to share?
This one is driving me nuts. I've issued a very simple statement to delete a single row from a table. It appears that when I execute it in SQL Query Analyzer the CPUTime spikes and holds one of the CPUs on the box pegged at 100%. I've let this thing run for over a day, and it's not deleting the one damn record. Any thoughts? :confused: :confused: Here's the command I'm executing:
DELETE FROM Invoices WHERE InvoiceID = 153345
Running SELECT * FROM Invoices WHERE InvoiceID = 153345 returns only a single record as it should. InvoiceID is the PK in this table. Any and all help is greatly appreciated. I've rebooted the server, but to no avail. Same thing happens after a reboot.
Hi everyone... I have a problem on deleting a record. I accidentally duplicate the record. I need to delete other records and left only 1 record based on each date and employeenumber.
supposing i have a table hrempshiftschedule i have 3 fields... empno, shiftdate, and shifttype
Hello, I am in the progress of designing a new section of my database and was thinking of creating a hole new database instead of just creating tables inside the database. My question is can you JOIN multiple tables in an SQL Statement from multiple databases. Ie, In the Management program I have a database called 'Convention' and another one called 'Services', inside the two databases there are many tables. Can I link say tblRegister from Convention to tblUser in Services? Thanks
Hi i have a very annying problem that i cant seem to solve by myself. I have developed a content managment system for a webpage where people can manage the page. It's almost done except for the fact that i cant seem to delete records from my sql express database. To access the database i use an sql login in my code to delete witchever record is retrived from a querystring in the URL field. Below is a sample of my delete code when a button is pressed. protected void ButtonDelete_Click(object sender, EventArgs e) { string dID = Request.QueryString["dID"];
string myConnectionString = @"Data Source=SRVWEBSQLEXPRESS;Initial Catalog=se;User ID=xx;Password=xx"; SqlConnection myConnection = new SqlConnection(myConnectionString); string myDeleteQuery = "DELETE FROM drift WHERE dID = @dID"; SqlCommand myCommand = new SqlCommand(myDeleteQuery); myCommand.Parameters.AddWithValue("dID", dID);
Response.Redirect("list.aspx"); } When the i run the code on my development machine located at 10.12.0.80 and the server is located at 10.12.1.65 and this is where the databse is located. The strangest thing is that when i press my deletebutton while debugging in VS2008 on my devmachine the record is deleted! BUT when i run the code live on the server i get an error. See the below log file taken from the windows 2003 server application log. Event Type: InformationEvent Source: ASP.NET 2.0.50727.0Event Category: Web Event Event ID: 1314Date: 2008-04-07Time: 10:26:45User: N/AComputer: SRVWEBDescription:Event code: 4011 Event message: An unhandled access exception has occurred. Event time: 2008-04-07 10:26:45 Event time (UTC): 2008-04-07 08:26:45 Event ID: 8bdda96aeee44448b570891c593bdb3e Event sequence: 242 Event occurrence: 1 Event detail code: 0 Application information: Application domain: /LM/W3SVC/1015505475/Root-1-128520196339603398 Trust level: Full Application Virtual Path: / Application Path: C:wwwwebsite Machine name: SRVWEB Process information: Process ID: 5156 Process name: w3wp.exe Account name: NT AUTHORITYNETWORK SERVICE Request information: Request URL: http://website/cms/drift/editdrift.aspx?dID=19 Request path: /cms/drift/editdrift.aspx User host address: 10.12.1.1 User: webmaster Is authenticated: True Authentication Type: Forms Thread account name: NT AUTHORITYNETWORK SERVICE Could anyone help me solve this problem. Thanks.
If I script the SQL statement with a constant, deleting the record from the database works.
If I script the SQL statement to delete based on the WHERE clause being a variable name, it will not delete the record.
The value being compared in the WHERE clause comes directly from the Sequel database.
I have a dropdown box that is filled from the database. The dropdown1.selecteditem.text is placed in a variable. The script is to delete a record from the database where the table.name in the database equals the item name selected from the dropdown box.
This querystring does not delete the record from the database:
dim queryString As String = "DELETE FROM [Table1] WHERE ([Table1].[name] = 'variableCompareText')"
This querystring does delete the recrod from the database:
dim queryString As String = "DELETE FROM [Table1] WHERE ([Table1].[name] = 'John')"
Why can't I delete a record with a variable in the querystring? Otherwise, you would have to always know in advance which record to specify rather than being deleted dynamically.
I'm having trouble with the below sql command. What I'm trying to do is to delete records from tblPhotoHeader table where there are no corresponding child records in tblPhoto.
The select statement works correctly, I'm just not sure about how to apply the syntax to correctly select the records in the delete statement.
Any help from the experts here would be helpful.
Thanks
Tom
--------------------------------------------------------------------- DELETE FROM tblPhotoHeader WHERE Exists
Well, I really messed up. Instead of changing the name of a current company record in a table I changed ALL the company names in the table. Me.CustomerDataSource.SelectCommand = "UPDATE tbl_customers SET company = '" & companyTextBox.Text & "'" So, I need to insert a WHERE clause to fix this. My problem is that I've been searching everywhere for this simple command structure and cannot find anything that specifically addresses a simple way to reference the current record. I tried...Me.CustomerDataSource.SelectCommand = "UPDATE tbl_customers SET company = '" & companyTextBox.Text & "' WHERE recno = @recno" But I get the error: Exception Details: System.Data.SqlClient.SqlException: Must declare the scalar variable "@recno". Can anyone provide this simple query clause?
Hi.I have a "union" table which results of a union of two tables.Occasionally I could have duplicates, when the same PIN has been addedto both tables, albeit at different Datees/Times, such as:PINNameAdded Date100411A7/11/2007 10:12:58 AM100411A7/17/2007 10:54:23 AM100413B7/11/2007 10:13:28 AM100413B7/17/2007 10:54:39 AM104229C7/6/2007 2:34:13 PM104231D7/6/2007 2:34:25 PM104869E6/10/2007 11:59:12 AM104869E6/22/2007 2:40:18 PMThe question is - how can I delete by queries the first occurence(time-wise) of these duplicates - i.e. I would want to delete thefirst occurence of 100411 (A), the first occurence of 100413 (B), andthe first occurence of 104869 (E) in the example above - records C andD show only once, so they are fine.Is there a MsAccess solution ? Is there a SQL-server solution ?Thank you very much !Alex
well i have 2 table one name detcom and another entcom stored in DB1 the key for both to join on is lets say A, B, C . I need to check if there are records based on the key A, B, C of both table where C EQUALS to '80_300_113' and if there are delete them and then grab data from another database named DB2 on same server (same instance) wich contains the same tables entcom and detcom and insert all the data from those tables into the same tables in DB1 based on the key and where C = '80_300_113'
I need to delete records from one table base on criteria from another table. The example below from the Northwind database shows exactly what I want to do. I want to delete the records from the employee table who a terrorityID of 30346 in the EmployeeTerritories table.
Can someone tell me how to write a delete statement that will delete the rows returned from the following SQL Statement? The sql statement will return one employee name. I would lke to delete that one employee from the employee table and I haven’t been able to figure out how to do it.
////////// Sql Statment SELECT dbo.EmployeeTerritories.EmployeeID, dbo.EmployeeTerritories.TerritoryID FROM dbo.EmployeeTerritories INNER JOIN dbo.Employees ON dbo.EmployeeTerritories.EmployeeID = dbo.Employees.EmployeeID WHERE (dbo.EmployeeTerritories.TerritoryID = N'30346') ////////// end of sql statement
What is the logic of the below DELETE statement?It deletes all records where the file_modified column value is smaller then the maximum value in the same column, but not crystal clear how...
delete a from Staging a left join (select max(file_modifieddate) as file_modifieddate from Staging) b on a.file_modifieddate = b.file_modifieddate where b.file_modifieddate is null
