Help With DELETE Statement
Nov 13, 2007
Hello there... I'm creating a ASP.net Web Application and storing all my data in SQL database.
I'm trying to create a Stored Procedure to Delete info from a table:
- I have 3 tables: A, B and C:
A's primary key is aID and has no foreign key
B's primary key is bID and has 1 foreign key: aID (linking this table to table A);
C's primary key is cID and has 1 foreign key: bID (linking this table to table B);
- As you can see, all 3 tables are linked (A to B and B to C)
I want to be able to DELETE all info from C only by giving aID, is this possible in SQL? I can retrieve the info easily through a SELECT statement and using an INNER JOIN (*). I also know how to do solve this by coding it in C# but I'd have to create some unnecessary variables and more than 1 Stored Procedure when it's probably possible to do all in one!
* SELECT cID FROM C
INNER JOIN B
ON B.bID = C.bID
WHERE A.aID= whatever
If anyone knows the solution to my problem, please don't hesitate :p
Thanks,
SuperJB
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Aug 12, 2007
I am trying to write one sql statement that deletes from two tables. Is it possible ? If yes, any thoughts ?
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Aug 10, 2006
I have 3 tables, with this relation:
tblChats.WebsiteID = tblWebsite.ID
tblWebsite.AccountID = tblAccount.ID
I need to delete rows within tblChats where tblChats.StartTime - GETDATE() < 180 and where they are apart of @AccountID. I have this select statement that works fine, but I am having trouble converting it to a delete statement:
SELECT * FROM tblChats c
LEFT JOIN tblWebsites sites ON sites.ID = c.WebsiteID
LEFT JOIN tblAccounts accounts on accounts.ID = sites.AccountID
WHERE accounts.ID = 16 AND GETDATE() - c.StartTime > 180
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Apr 11, 2007
Hi,I would like to delete a record from a table on the condition that a corresponding ID is located in another table, ie. deleting an email message if the user ID is listed as a recipient in a recipient table etc. Here is my SQL statement: DELETE FROM id_email_message WHERE (id_message IN (SELECT id_message FROM recipients
WHERE id_user = 324) AND message.id_message_status = 2) OR (id_message IN
(SELECT id_message FROM message WHERE id_owner = 324 and id_message_status = 2)) The problem is the multiple select statements paired with the delete statement is too much overhead for the server and I always get a timeout server error (at least that's what I'm guessing, the error page and tracing isn't much helpful). Is there a more efficient way to do this?Thanks.Eitan
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Sep 15, 2004
hi, i want to delete some records from my table if there is more then 150 records (it should always be max 150records, it can be less and then it shouldent delete anything),
so when it goes over to 151 records i want to delete the oldest record, so i get the new record + 149 old records, is there a simple way to do this?
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Dec 14, 2001
When does the DELETE statement physically deletes the records? For example, if I execute the DELETE statement and in the middle of the execution I understand that it is wrong. What will happen if I stop it? Will it delete the records partially? I think the deletion happens when the full statement is done but need an expert answer. Thank you.
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Oct 2, 2006
Hi what do i need to add to this stmt to delete the result ?
---------------
select ct_cust1_text01,ct_address,ct_cust1_text09,count(*)from TABLE_NAME group by ct_cust1_text01,ct_address,ct_cust1_text09 having count(*) > 1
---------
i have tried delete * from TABLE_NAME where (select...)
not great at SQL appreciate any help...
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Dec 6, 2006
Hello
I am trying to delete a row from one table and I expected it to also be removed from the subsequent child tables, linked via foreign and primary keys.
However, when I tried to delete a row in the first table I saw this error:
DELETE FROM [dbo].[Names_DB]WHERE [LName_Name]=N'andrews'
Error: Query(1/1) DELETE statement conflicted with COLUMN REFERENCE constraint 'FK_LName_Name'. The conflict occurred in database 'MainDB', table 'Category_A', column 'LName_Name'.
I went to the very last table in the sequence and I was able to delete the row without problems, but it did not effect any of the other tables.
Please advise.
I need to make many changes in these tables, should I use a trigger instead, if so what is the code to trigger each table? I am new to triggers.
Thanks
Regards
Lynn
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Sep 26, 2007
Hi! I am deleting some records from the database and at the same time inserting them into a new table. I am doing all this with sql querries. How can that be done with triggers. Basically on the delete, i'd like to insert the affected records. Thanks!
James
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Mar 12, 2006
Hey guys...
I am trying to tidy up my code a bit and have one SQL command (Sub class) to call when needing to insert, update, delete and select.
I have got one class I am testing with that delete from a table support_ticket and then calls RunSQL() again to delete the corresponding tickets in Support_Reply.
however it only seems to want to delete from one table at a time...as i commented out the first sql and it worked and the second fires...but if the first one is active it doesnt fire.
Do anyone on the forum know why this has happened?
Sub DeleteUserTicket(sender as Object, e as EventArgs)
Dim strSQL1 = "DELETE FROM Support_Ticket WHERE (TicketID = " & txtticketID & ")"
RunSQL(strSQL1)
strSQL1 = "DELETE FROM Support_Reply WHERE (TicketID = " & txtticketID & ")"
RunSQL(strSQL1)
End Sub
'One class to run the sql statements for the entire page this will reduce in repetitve code as well as reduce code size
Sub RunSQL(strSQL)
Dim objCmd As SqlCommand
Dim sqlConn = New SqlConnection(strConn)
objCmd = New SQLCommand(strSQL, sqlConn)
objCmd.Connection.Open()
'Check that the rows can be deleted if not then return a error.
Try
objCmd.ExecuteNonQuery()
response.redirect("ticketsystemtest2.aspx")
Message.InnerHtml = "<b>Ticket " & txtticketID & " Closed</b> <br/>"
Catch ex As SqlException
If ex.Number = 2627 Then
Message.InnerHtml = "ERROR: A record already exists with " _
& "the same primary key"
Else
Message.InnerHtml = "ERROR: Could not update record, please " _
& "ensure the fields are correctly filled out <br>" & ex.Message & " " & ex.Number
Message.Style("color") = "red"
End If
End Try
objCmd.Connection.Close()
sqlConn = nothing
objcmd = nothing
End Sub
cheers
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Sep 6, 2001
One of our developers just deleted a ton of records- is there any way we can recover this data? (we can't use a backup since a ton of changes were made since we last backed up)
Thanks-
Jack
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Feb 1, 2001
i am having problem running a simple delete statement against a table. it just hangs is there anything i should look at? the table has 4 primary keys and the index makes up of the 4 keys and ideas?
i viewed the delete statement with the execusion plan and this is what i saw.
delete -> index delete/delete -> sorting the input -> table delete/delete -> Top -> Index scan.
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Dec 12, 2005
Hi,
I've got a table with about 500 000 records and growing monthly by about 40 000 records
When I perform the following query:
DELETE from [myTable] WHERE Month = '07' AND Year='2005'
This query will take about 10 minutes to execute. Columns Month & Year are both indexed.
Surely MSSQL can't be this slow on only 500 000 records.
Must I do some other database optimization ???
Thanks
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Jan 27, 2005
Hello, currently I have a query like this:
PHP Code:
SELECT *
FROM relations INNER JOIN
paths ON relations.path = paths.path_id
WHERE
(paths.links = '161') AND (relations.node1 = 162) OR
(paths.links = '161') AND (relations.node2 = 162) OR
(paths.links = '162') AND (relations.node1 = 161) OR
(paths.links = '162') AND (relations.node2 = 161) OR
(paths.links LIKE '162%') AND (relations.node1 = 161) OR
(paths.links LIKE '%162') AND (relations.node2 = 161) OR
(paths.links LIKE '161%') AND (relations.node1 = 162) OR
(paths.links LIKE '%161') AND (relations.node2 = 162) OR
(paths.links LIKE '%161;162%') OR
(paths.links LIKE '%162;161%')
ORDER BY relations.node1
Don't pay attention to the 161 and 162 things, is just test data, now my problem is that I want to transform that into a DELETE statement, but I can't find the right way to do it, so far I managed to do something like:
PHP Code:
DELETE relations
FROM relations INNER JOIN
paths ON relations.path = paths.path_id
WHERE
(paths.links = '161') AND (relations.node1 = 162) OR
(paths.links = '161') AND (relations.node2 = 162) OR
(paths.links = '162') AND (relations.node1 = 161) OR
(paths.links = '162') AND (relations.node2 = 161) OR
(paths.links LIKE '162%') AND (relations.node1 = 161) OR
(paths.links LIKE '%162') AND (relations.node2 = 161) OR
(paths.links LIKE '161%') AND (relations.node1 = 162) OR
(paths.links LIKE '%161') AND (relations.node2 = 162) OR
(paths.links LIKE '%161;162%') OR
(paths.links LIKE '%162;161%')
But that would delete only from the relations table and not from the paths table. I need to delete from both tables.
Can anyone help me please? Its kinda urgent.
Thansk!
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Oct 26, 2004
Hi,
I need to delete the following records (from enrollment_fact):
SELECT
a."STU_SID",
a."SCHOOL_YEAR",
a."DATE_SID",
a."LOC_SID"
FROM "dbo"."ENROLLMENT_FEX2" b,
"dbo"."LOCATION_DIM" c
LEFT OUTER JOIN
"dbo"."ENROLLMENT_FACT" a
on c."LOC_SID" = a."LOC_SID"
WHERE
b."LOC_KEY" = c."LOC_KEY"
and
a."DATE_SID" between b."MIN_DATE" and b."MAX_DATE"
This is the approach (excuse the misuse of the concat function, but you get the idea)
DELETE FROM "dbo"."ENROLLMENT_FACT"
WHERE CONCAT (a."STU_SID", a."SCHOOL_YEAR", a."DATE_SID", a."LOC_SID")
IN (
SELECT DISTINCT CONCAT (a."STU_SID",
a."SCHOOL_YEAR",
a."DATE_SID",
a."LOC_SID"
)
FROM "dbo"."ENROLLMENT_FEX2" b,
"dbo"."LOCATION_DIM" c
LEFT OUTER JOIN "dbo"."ENROLLMENT_FACT" a
ON c."LOC_SID" = a."LOC_SID"
AND a."DATE_SID" BETWEEN b."MIN_DATE"
AND b."MAX_DATE")
comments? better way? (without using an sp)
thanks
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Mar 2, 2005
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'
PLZ help
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Nov 4, 2007
Hi,My question is :
CREATE TABLE t1
(c1 INTEGER,
c2 INTEGER,
c3 DECIMAL(15,0 ))
INSERT INTO t1 VALUES (1, 2, 3.0)
How can i define a SQL commend will cause C1 to be decremented each time a row is deleted from the T2 table?
Thanks !
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Apr 29, 2008
I have a rather tricky SQL delete query I’m trying to perform, preferably without cursors. I have the following data set, where I want each of the first changes to the status.
IDStatus
1Good
2So-So
3So-So
4Bad
5Bad
6Bad
7Bad
8Bad
9So-So
10Good
So given the above data set I would want to delete the following IDs: 3, 5, 6, 7, and 8. As they not the first in order. The problem is that while I can get isolate and save first instance of each status (in this case 1, 2, and 4), I can’t get the what I want. Is there a SQL way of accomplishing this.
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Jul 30, 2013
i have problem to discuss regarding delete statement. Due to the bad design of application i have added some duplicate values in table. i have fixed the issue for new insert but how to delete my old bad id. i have table having three column,
ID1 ID2 ID3
101 2 3
102 2 3
103 2 4
104 3 4
in my case first two record are duplicate i want to keep first one and delete the other.
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Nov 7, 2013
I have duplicate rows of data with the exact same data, for multiple sets of data.For example,
1 Fred Flintstone
1 Fred Flintstone
2 Barney Rubble
2 Barney Rubble
etc...
If I use the delete and where command, it will delete both rows and I want to keep one of them. I don't want to copy down each one and re insert as there are too many columns for each one and there are too many rows also.I was thinking of a delete row-number command in a where statement. but tried multiple forums and its not working.
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Apr 28, 2015
I have to write a delete statement that deletes all customers that have not put in an order I must use a subquery in the exist operator.
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Jul 19, 2006
Is it possible to create a function that deletes records from a table ?
CREATE FUNCTION F_TSImported_Delete()
returns int
as
Begin
delete from ts_imported
return 0
end
GO
This throws error like this:
Invalid use of side-effecting or time-dependent operator in 'DELETE' within a function.
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Jan 2, 2007
i am creating an insert based on a select statement -- i need to delete the row from the select statment table after it has been inserted
something like
insert into table_insert(value1, value2)
(select table_exclude_id, value1, value2 from table exclude)
delete from table_exclude where table_exclude_id in "the select statement"
can you do this?
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Mar 1, 2008
I have a simple database program which uses the following statement to delete rows by a date range. In testing the SQL statement, it worked, but when using it in the VB program, it says it worked, but doesn't remove the row. I am using a local database. Please help.
cmdDeletePayments.CommandType = Data.CommandType.Text
cmdDeletePayments.CommandText = "DELETE Payments WHERE (CheckDate BETWEEN @BeginningDate AND @EndingDate)"
cmdDeletePayments.Parameters("@BeginningDate").Value = CType(dtpBeginning.Text, Date)
cmdDeletePayments.Parameters("@EndingDate").Value = CType(dtpEnding.Text, Date)
Try
conPayments.Open()
iRows = cmdDeletePayments.ExecuteNonQuery()
conPayments.Close()
Catch ex As Exception
MessageBox.Show(ex.Message, "Error", MessageBoxButtons.OK, MessageBoxIcon.Error)
End Try
MessageBox.Show(iRows.ToString + " records deleted.", "Success", MessageBoxButtons.OK, MessageBoxIcon.Information)
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Mar 1, 2008
I have a piece of code that uses the db-library with sql server 2000/2005 and runs the following delete statement:
DELETE FROM TABLE1 WHERE COL1 IN( 'Some Val1' ) AND COL2 IN( 'Some Val2' ) AND Col3 IN( integer1 ) AND Col4 IN( integer2 ) AND Col5 IN( 'Some Val3' )
on TABLE1, uploads data into TABLE1 through bulk loading, calls a stored procedure that uses the data, and then deletes the data through the SAME delete statement with EXACTLY the same parameter values. The first delete statement is always successful, but the second statement intermittently gives the following error:
0,0,MS SQL Server Message :
SQL Server message 512, state 1, severity 16:
Subquery returned more than 1 value. This is not permitted when the subquery follows =, !=, <, <= , >, >= or when the subquery is used as an expression.
SQL Server message 3621, state 0, severity 0:
The statement has been terminated.
Note: I was initially using the equality operator instead of the IN operator in the query but that gave the same results.
Can somebody tell me whats going wrong here? I can easily ignore this error because my work is done after the stored proc but I fear amassing a lot of useless data in the table over time. Also http://support.microsoft.com/kb/195491 talks about a case where the delete statement is actually successful but still causes an error when using ADO.
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Oct 7, 2007
I'm working on a address book where customers can add, edit and delete address book entries. For the life of me I can't figure out what I'm messing up with the Update and Delete statements of this feature. Can someone please help me.Here's my code: <asp:SqlDataSource ID="SqlDataSource1" runat="server" ConflictDetection="CompareAllValues" ConnectionString="<%$ ConnectionStrings:kalistadbConnectionString %>" DeleteCommand="DELETE FROM [Address] WHERE [AddID] = @original_AddID AND [AddNick] = @original_AddNick AND [AddFN] = @original_AddFN AND [AddLN] = @original_AddLN AND [AddCompany] = @original_AddCompany AND [AddAddress] = @original_AddAddress AND [AddCity] = @original_AddCity AND [AddProv_State] = @original_AddProv_State AND [AddPostal_Zip] = @original_AddPostal_Zip AND [AddCountry] = @original_AddCountry AND [AddPhone] = @original_AddPhone AND [CustID] = @original_CustID" InsertCommand="INSERT INTO [Address] ([AddNick], [AddFN], [AddLN], [AddCompany], [AddAddress], [AddCity], [AddProv_State], [AddPostal_Zip], [AddCountry], [AddPhone], [CustID]) VALUES (@AddNick, @AddFN, @AddLN, @AddCompany, @AddAddress, @AddCity, @AddProv_State, @AddPostal_Zip, @AddCountry, @AddPhone, @CustID)" OldValuesParameterFormatString="original_{0}" onselecting="SqlDataSource1_Selecting" OnInserting="SqlDataSource1_Inserting" SelectCommand="SELECT * FROM [Address] WHERE ([CustID] = @CustID)" UpdateCommand="UPDATE [Address] SET [AddNick] = @AddNick, [AddFN] = @AddFN, [AddLN] = @AddLN, [AddCompany] = @AddCompany, [AddAddress] = @AddAddress, [AddCity] = @AddCity, [AddProv_State] = @AddProv_State, [AddPostal_Zip] = @AddPostal_Zip, [AddCountry] = @AddCountry, [AddPhone] = @AddPhone, [CustID] = @CustID WHERE [AddID] = @original_AddID AND [AddNick] = @original_AddNick AND [AddFN] = @original_AddFN AND [AddLN] = @original_AddLN AND [AddCompany] = @original_AddCompany AND [AddAddress] = @original_AddAddress AND [AddCity] = @original_AddCity AND [AddProv_State] = @original_AddProv_State AND [AddPostal_Zip] = @original_AddPostal_Zip AND [AddCountry] = @original_AddCountry AND [AddPhone] = @original_AddPhone AND [CustID] = @original_CustID"> <SelectParameters> <asp:Parameter Name="CustID" /> </SelectParameters> <DeleteParameters> <asp:Parameter Name="original_AddID" Type="Int64" /> <asp:Parameter Name="original_AddNick" Type="String" /> <asp:Parameter Name="original_AddFN" Type="String" /> <asp:Parameter Name="original_AddLN" Type="String" /> <asp:Parameter Name="original_AddCompany" Type="String" /> <asp:Parameter Name="original_AddAddress" Type="String" /> <asp:Parameter Name="original_AddCity" Type="String" /> <asp:Parameter Name="original_AddProv_State" Type="String" /> <asp:Parameter Name="original_AddPostal_Zip" Type="String" /> <asp:Parameter Name="original_AddCountry" Type="String" /> <asp:Parameter Name="original_AddPhone" Type="String" /> <asp:Parameter Name="original_CustID" /> </DeleteParameters> <UpdateParameters> <asp:Parameter Name="AddNick" Type="String" /> <asp:Parameter Name="AddFN" Type="String" /> <asp:Parameter Name="AddLN" Type="String" /> <asp:Parameter Name="AddCompany" Type="String" /> <asp:Parameter Name="AddAddress" Type="String" /> <asp:Parameter Name="AddCity" Type="String" /> <asp:Parameter Name="AddProv_State" Type="String" /> <asp:Parameter Name="AddPostal_Zip" Type="String" /> <asp:Parameter Name="AddCountry" Type="String" /> <asp:Parameter Name="AddPhone" Type="String" /> <asp:Parameter Name="CustID" /> <asp:Parameter Name="original_AddID" Type="Int64" /> <asp:Parameter Name="original_AddNick" Type="String" /> <asp:Parameter Name="original_AddFN" Type="String" /> <asp:Parameter Name="original_AddLN" Type="String" /> <asp:Parameter Name="original_AddCompany" Type="String" /> <asp:Parameter Name="original_AddAddress" Type="String" /> <asp:Parameter Name="original_AddCity" Type="String" /> <asp:Parameter Name="original_AddProv_State" Type="String" /> <asp:Parameter Name="original_AddPostal_Zip" Type="String" /> <asp:Parameter Name="original_AddCountry" Type="String" /> <asp:Parameter Name="original_AddPhone" Type="String" /> <asp:Parameter Name="original_CustID" /> </UpdateParameters> <InsertParameters> <asp:Parameter Name="AddNick" Type="String" /> <asp:Parameter Name="AddFN" Type="String" /> <asp:Parameter Name="AddLN" Type="String" /> <asp:Parameter Name="AddCompany" Type="String" /> <asp:Parameter Name="AddAddress" Type="String" /> <asp:Parameter Name="AddCity" Type="String" /> <asp:Parameter Name="AddProv_State" Type="String" /> <asp:Parameter Name="AddPostal_Zip" Type="String" /> <asp:Parameter Name="AddCountry" Type="String" /> <asp:Parameter Name="AddPhone" Type="String" /> <asp:Parameter Name="CustID" /> </InsertParameters> </asp:SqlDataSource>
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Feb 3, 2008
Hey everyone,
Currently I have a problem that with a gridview delete command because the database I currently want to delete from is a PK to 1 other table. So how can I delete from that "Membership" table before I use the gridview to delete from the "Events" table? Here is a very shortened version of the tables
Events
EventID (PK)
Membership
MembershipID
EventID (FK)
UserID (FK)
I have to delete ALL the members from the event in the membership table first before I can delete the actual Event...So how can I do that when the gridview only allows you to delete from 1 table, if I understand this correctly.
Here is the sqldatasource delete command as of right now.
DeleteCommand="DELETE FROM [Events_Events] WHERE [EventID] = @original_EventID"
Obviously I am getting a error because of the FK.
Thanks,
Chris
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Mar 23, 2008
I need to delete a record from a SQL server database table. I need to target a specific column with a query that looks like the following:
delete from NameTable where Name = 'Barbosa'
The problem is that their are two other records with the name spelled similarly, only differing by case sensitivity. Like as follows:
'Barbosa'
'barbosa'
'BarBosa'
Is sql case sensitive? Will my Sql delete statement only delete the record with the word 'Barbosa' in that column. Or will it delete all of the records with the names
'Barbosa'
'barbosa'
'BarBosa'
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Jun 13, 2008
When I debug my code I see the string going into the parameter correclty, but the the delete statement doesnt work and I'm not sure why. Does this look ok? // Set up SqlCommand, connection to db, sql statement, etc.
SqlCommand DeleteCommand = new SqlCommand();
DeleteCommand.Connection = DBConnectionClass.myConnection;
DeleteCommand.CommandType = CommandType.Text;
// Store Primary Key photoID passed here from DeleteRows_Click
// in a parameter for DeleteCommand
SqlParameter DeletePrimaryKeyParam = new SqlParameter();
DeletePrimaryKeyParam.ParameterName = "@PhotoID";
DeletePrimaryKeyParam.Value = photoID.ToString();
// Insert new parameter into command object
DeleteCommand.Parameters.Add(DeletePrimaryKeyParam);
// Delete row, open connection, execute, close connection
DeleteCommand.CommandText = "Delete From Photo_TBL where PhotoID IN (@PhotoID)";
Response.Write(DeleteCommand.CommandText);
// DeleteCommand.Connection.Close();
DeleteCommand.Connection.Open();
DeleteCommand.ExecuteNonQuery();
DeleteCommand.Connection.Close();
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Apr 17, 2015
I am supposed to delete all rows from USER and its child tables based on PracticeID = '55' filter condition.
I have dynamically generated queries to delete child table first followed by parent. Table [EncounterSignOff] si child and [User] is parent.
I would like to know, whether the Query 1 is valid for deleting child records?
Query:1
DELETE Top(100000) FROM [dbo].[EncounterSignOff]
FROM [dbo].[User] INNER JOIN [dbo].[EncounterSignOff] ON [User].[UserID] = [EncounterSignOff].[UserId]
WHERE [User].PracticeID = '55';
Query:2
DELETE Top(100000) FROM [dbo].[User] WHERE [User].PracticeID = '55';
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Jan 11, 2006
I am trying to delete records in a table if a flag set in a linked table is set, but seem to be having problems with it. Neither of the following work:
DELETE FROM DSCar WHERE SerialNum IS NOT NULL
AND DSCar.SerialNum=DSOrds.SerialNum
AND DSOrds.StatusFlag='3'
This reports DSOrds.SerialNum could not be bound
DELETE FROM DSCar
INNER JOIN DSOrds ON DSCar.SerialNum=DSOrds.SerialNum
WHERE DSOrds.StatusFlag='3'
This reports Incorrect syntax near the keyword 'INNER'
But a similar SELECT statement works fine:
SELECT * FROM DSCar
INNER JOIN DSOrds ON DSCar.SerialNum=DSOrds.SerialNum
WHERE DSOrds.StatusFlag='3'
I think it is something simple but am having a real head scratcher.
Thanks
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Feb 6, 2008
Is there a SQL statement that will delete the primary key data and data in the other tables that depend on that primary key?
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Nov 5, 2006
Hi,
I have a large database with complex relations and I just can't figure out how to delete a single record and all its relations across database (not to mention that I can't understand why can't the DELETE statement work just like the SELECT).
It would be impossible to let you know the structure through this message, but let's say that I have 5 tables in which there are relations like this (all the tables contains a unique ID for each record, but not all contains info of the main record):
Production -> ProductionTypes
Sales -> ProductionTypes
Production -> Sales
Sales -> Personnel
Personnel --> Orders
Orders --> Financial
I hope we agree that if I delete the ProductionID.Production directly, there will be no way to know which Financial.Commission I have to delete because I just can't insert the ProductionID in every table on the database.
What do I have to do ? I just couldn't find any solid information regarding this subject on the net.
Many many thanks in advance !
George
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