How To Delete Rows In A Table When No Primary Key Is Defined

Jul 23, 2005

Hello,

I want to delete duplicate rows in a table when no primary key is
defined.
For eg: If we have table1 with data as below,

Suma 23 100
Suma 23 100

I want to delete a row from this table and retain only one row.

I tried deleting self joins and exists operator. But it is deleting
both the rows. I want to retain one row.

Can anybody help me out.

Thanks in advance,
Suma

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Is Is Necessary For A Table Which Will Be Part Of The Replication Process To Have A And Primary Key Defined On It?

May 17, 2007

Hi there,



We're going to use replication on our database. There are tables without any primary key.

Is a primary key necessary for replication?



I have also antoher question: We want to replicate the whole OLTP database (size 30 GB).

Is snapshot replication a suitable mechanisme for this? I thougt snapshot replication overwrites all of the data, not only changed data. Or should we use another replication method?



Thanks in advance,



Patrick de Jong

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Hi,

This is an easy one.

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In my table I have following current data. I want to delete duplicate records from table.I am trying following SQL statement, So I am getting desired output which is orange color in current data. I want to keep the desired output records and other all should be deleted. But complection is that in current data values in C5 and C6 are different.

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I have one table that has unique id's associated with each row of information. I want to delete rows of information in one table that have a unique ID that references information in another table.

Here is a basic breakdown of what I am trying to do:

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I tried this on a test set of tables and could not get it to work. What I am trying to do is skip all rows of Table1 that have ID's present in Table2, and delete the rows of ID's that are not present in Table2.

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I wanted it to delete all rows in Table1 that did not have a reference to a user ID that matched any ID's in Column_z of Table2

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Code:


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Code:

CREATE PROCEDURE dbo.sp_CleanUp_Table_tblSoldRaw
/***************************************************************
** CREATED: 12/04/2006
****************************************************************
** DESCRIPTION: Clean the tblSoldRaw by deleting any data that
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**
****************************************************************
** NOTES: Hooked up to BookItOut Data Importer Windows Service
****************************************************************
** MODIFICATIONS:
**
** DATE WHO MODIFICATION DESCRIPTION
** -------------------------------------------------------------
**
***************************************************************/
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