Deletion

Nov 6, 2007

Hi all,

I have a table in xyz database and there is no column in table like creation_date or modified_date.

The problem is I want to delete records which has been added in the table before 1st jan 2007.

The size of table is 85 GB

Immediate help would be appriciable.

Regards,
Frozen

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Restrict Deletion

Mar 11, 2007

What would be the best practice to prevent users who didn't create a record in sql from deleting? When a record is created I have the username who created the record in one of the fields. I was thinking maybe a query?
 
Thank you in advance.

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Deletion Problem

Jun 4, 1999

It is an option to set deletion without getting logged since I have problem to delete two years historical data and would like to keep this year data on my 80MB rows. Actually I create a new table to get copy one-year data and I truncated the old table. I am wondering if there is other better way to do this task.

TIA,

Stella Liu

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Replication Without Deletion

Mar 19, 2007

Hello there,

We are currently setting up out production server to the following requirements:

1. Every month, delete records that haven't been changed in the last 90 days.
2. Replicate insert statements to a backup database which will keep track of all data, and act as an archive/data warehouse.

The first step is easy, as it is just a script that checks the date of the last change on each row. However, the second step is a bit more tricky. We tried setting up replication between two test databases, but we ran into the following problem: Whenever old data has been deleted in the production database, the replication agent deletes it in the data warehouse database too.

Is it possible to override or disable this, so data is only inserted/updated, and not deleted? No applications using the database deletes records, so database integrity should not be a problem.


Thanks for your time,

Ulrik Rasmussen

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Apr 15, 2008

While performing import actions I had a system freeze, when the system returned the sessions had been closed and the database had vanished, with the help of support we recovered the database only to find that the original project ID had a suffix attached ( Original 40/0110, New 40/0110-1 ), when I try to return it to it's original numbering convention it says it has to be a unique number which suggests to me it is not deleted but hiding in the background, can the original be recovered or is it possible to renumber the recovered database, I have searched the whole of the databases and the original is nowhere to be seen.

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Jun 4, 2008

Is there an option to find out the deleted DBs on a server?

------------------------
I think, therefore I am - Rene Descartes

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Oct 12, 2013

table1 has a PK_tbl1 which matches FK_tbl1 in table2 and the relationship is one to one. Like this:

table1 has columns of UnitId, Code ...
table2 has columns of ItemID, UnitId ...

So if I need remove an item from table1 I must remove the matched one in table2 first.

delete from table2 where UnitId = xxx
delete from table1 where UnitId = xxx

Now I need create a trigger on table1 for deletion:

CREATE Trigger [dbo].[Table1_Delete]
ON [dbo].[Table1]
FOR DELETE
As

[code]....

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Nov 22, 2006

Hi

I want to try and protect myself from my own stupidity. I have a number of sql databases, but one is LIVE. It is easy to drop tables but I want to set something (e.g. a password) which will help prevent me from dropping tables on the live database.

Any help/direction here would be appreciated.

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Jul 23, 2005

Hi Everyone,I have a table in which their is record which is exactly same.I want to delete all the duplicate keeping ony 1 record in a table.ExampleTable AEmpid currentmonth PreviousmonthSupplimentarydays basic158 2001-11-25 00:00:00.000 2001-10-01 00:00:00.000 2.004701.00158 2001-11-25 00:00:00.000 2001-10-01 00:00:00.000 2.004701.00158 2001-11-25 00:00:00.000 2001-10-01 00:00:00.000 2.004701.00I want to delete 2 rows of above table.How can I achieve that.Any suggestion how can i do that.Thank you in advanceRichard

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May 29, 2008

Ok, so I have an issue, was wondering if anybody else has any suggestions.

I have a table that is pretty large, in all regards. It is a "message" table that holds text messages that users send to each other.

1. Has some data fields, integers, dates, some bit columns, a message subject field (varchar(250)), and a message body field (field type = text)
2. Table contains about 70 million records
3. Table has 6 indexes associated to it
4. Table has 2 views associated to it.
5. Table has 8 foreign keys associated to it.

I need to delete, oh, about 90,000 records out of this 70 million record table. I am able to disable the foreign keys to this table for deletion, but that does not seem to mitigate the problem. I think the issue lies with having to update the indexes as well as the views.

When I execute the select statement to retrieve the records I need to delete, it executes pretty quickly, no problems there that I can see.

The issue comes when I try to delete the records, it takes way too long, and we know it. We let it run for an hour and it didn't really get anywhere. This is in a server environment, some pretty decent hardware, 8gig memory, fast SCSI drives, 8 core processors, i don't know the exact specifics, but they're not bad.

Here's a DBCC SHOWCONTIG on our table

DBCC SHOWCONTIG scanning 'message' table...
Table: 'message' (1448040590); index ID: 1, database ID: 13
TABLE level scan performed.
- Pages Scanned................................: 51602
- Extents Scanned..............................: 6486
- Extent Switches..............................: 6948
- Avg. Pages per Extent........................: 8.0
- Scan Density [Best Count:Actual Count].......: 92.83% [6451:6949]
- Logical Scan Fragmentation ..................: 0.54%
- Extent Scan Fragmentation ...................: 0.93%
- Avg. Bytes Free per Page.....................: 93.5
- Avg. Page Density (full).....................: 98.85%
DBCC execution completed. If DBCC printed error messages, contact your system administrator.

This is from our dev environment which is but a portion of our production db- but I presume our production environment will have similar percentages (not necessarily the pages scanned)

Any suggestions on how to delete records efficiently?

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Feb 7, 2008



Hello,
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hi,

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Apr 14, 2006

hi

Basically, I create a database with sql, then I delete it manually(not via sql statment. This is a problem which I realise. In fact, you can't delete the database because the VS 2005 still is using it) I run the same code again,
then it says the database still exists, even it is physically destroied.

------Here is the errors:
System.Data.SqlClient.SqlException: Database 'riskDatabase' already exists.
at System.Data.SqlClient.SqlConnection.OnError(SqlExc eption exception, Boolea
n breakConnection)

------The evidence that the database doesn't exist physically:
Unhandled Exception: System.Data.SqlClient.SqlException: Cannot open database "riskDatabase" requested by the login. The login failed.

------The code:
/*
* C# code to programmically create
* database and table. It also inserts
* data into the table.
*/

using System;
using System.Collections.Generic;
using System.Text;

using System.Configuration;
using System.Data;
using System.Data.SqlClient;
using System.IO;

namespace riskWizard
{
public class RiskWizard
{
// Sql
private string connectionString;
private SqlConnection connection;
private SqlCommand command;

// Database
private string databaseName;
private string currDatabasePath;
private string database_mdf;
private string database_ldf;

public RiskWizard(string databaseName, string currDatabasePath, string database_mdf, string database_ldf)
{
this.databaseName = databaseName;
this.currDatabasePath = currDatabasePath;
this.database_mdf = database_mdf;
this.database_ldf = database_ldf;
}

private void executeSql(string sql)
{
// Create a connection
connection = new SqlConnection(connectionString);

// Open the connection.
if (connection.State == ConnectionState.Open)
connection.Close();

connection.ConnectionString = connectionString;
connection.Open();

command = new SqlCommand(sql, connection);
try
{
command.ExecuteNonQuery();
}
catch (SqlException e)
{
Console.WriteLine(e.ToString());
}
}

public void createDatabase()
{
string database_data = databaseName + "_data";
string database_log = databaseName + "_log";

connectionString
= "Data Source=.\SQLExpress;Initial Catalog=;Integrated Security=SSPI;";

string sql = "CREATE DATABASE " + databaseName + " ON PRIMARY"
+ "(name=" + database_data + ",filename=" + database_mdf + ",size=3,"
+ "maxsize=5,filegrowth=10%)log on"
+ "(name=" + database_log + ",filename=" + database_ldf + ",size=3,"
+ "maxsize=20,filegrowth=1)";

executeSql(sql);
}

public void dropDatabase()
{
connectionString
= "Data Source=.\SQLExpress;Initial Catalog=" + databaseName + ";Integrated Security=SSPI;";

string sql = "DROP DATABASE " + databaseName;

executeSql(sql);
}

// Create table.
public void createTable(string tableName)
{
connectionString
= "Data Source=.\SQLExpress;Initial Catalog=" + databaseName + ";Integrated Security=SSPI;";

string sql = "CREATE TABLE " + tableName +
"(userId INTEGER IDENTITY(1, 1) CONSTRAINT PK_userID PRIMARY KEY," +
"name CHAR(50) NOT NULL, address CHAR(255) NOT NULL, employmentTitle TEXT NOT NULL)";

executeSql(sql);
}

// Insert data
public void insertData(string tableName)
{
string sql;

connectionString
= "Data Source=.\SQLExpress;Initial Catalog=" + databaseName + ";Integrated Security=SSPI;";

sql = "INSERT INTO " + tableName + "(userId, name, address, employmentTitle) " +
"VALUES (1001, 'Puneet Nehra', 'A 449 Sect 19, DELHI', 'project manager') ";
executeSql(sql);

sql = "INSERT INTO " + tableName + "(userId, name, address, employmentTitle) " +
"VALUES (1002, 'Anoop Singh', 'Lodi Road, DELHI', 'software admin') ";
executeSql(sql);

sql = "INSERT INTO " + tableName + "(userId, name, address, employmentTitle) " +
"VALUES (1003, 'Rakesh M', 'Nag Chowk, Jabalpur M.P.', 'tester') ";
executeSql(sql);

sql = "INSERT INTO " + tableName + "(userId, name, address, employmentTitle) " +
"VALUES (1004, 'Madan Kesh', '4th Street, Lane 3, DELHI', 'quality insurance mamager') ";
executeSql(sql);
}

public static void Main(String[] argv)
{
string databaseName = "riskDatabase";
string currDatabasePath = "E:\liveProgrammes\cSharpWorkplace\riskWizard\A pp_Data";
// Need to be more flexible.
string database_mdf = "'E:\liveProgrammes\cSharpWorkplace\riskWizard\ App_Data\riskDatabase.mdf'";
string database_ldf = "'E:\liveProgrammes\cSharpWorkplace\riskWizard\ App_Data\riskDatabase.ldf'";

RiskWizard riskWizard = new RiskWizard(databaseName, currDatabasePath, database_mdf, database_ldf);
riskWizard.createDatabase();
riskWizard.createTable("userTable");
riskWizard.insertData("userTable");
//riskWizard.dropDatabase();
}
}
}

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For Deletion..trigger Is Not Working

May 4, 2004

Hi,
I have this trigger, it is working fine when i add new data but it doesn't work when I delete data from the table?

Any idea?

Any help will be highly appreciated.


CREATE TRIGGER [PROP_AMT] ON [dbo].[cqe_item]
FOR INSERT, UPDATE, DELETE
AS
DECLARE
@var_DB_contract INTEGER,
@var_CQE INTEGER,
@var_PC INTEGER,
@var_item VARCHAR(7),
@var_AMT_PAID INTEGER,
@var_AMT_RET INTEGER,
@var_ITEM_NEW VARCHAR(1),
@var_quant DECIMAL,
@var_fiyr INTEGER,
@var_amt_result INTEGER,
@var_amt_ret_result INTEGER,
@var_amt_old INTEGER,
@var_amt_ret_old INTEGER,
@var_quant_result INTEGER,
@var_quant_new INTEGER,
@var_quant_old INTEGER,
@Item_new VARCHAR(7),
@var_chk varchar(1)

--If Exists (Select 1 From Inserted) And Exists (Select 1 From Deleted)
set @var_db_contract =(SELECT a.db_contract FROM inserted a,deleted b where a.db_contract = b.db_Contract and a.cqe_numb = b.cqe_numb and a.pc_code = b.pc_code and a.item_no = b.item_no )
IF @var_db_contract IS NOT NULL
BEGIN
SET @var_db_contract=(SELECT a.db_contract FROM inserted a,deleted b where a.db_contract = b.db_Contract and a.cqe_numb = b.cqe_numb and a.pc_code = b.pc_code and a.item_no = b.item_no )
SET @var_cqe=(SELECT a.cqe_numb FROM inserted a,deleted b where a.db_contract = b.db_Contract and a.cqe_numb = b.cqe_numb and a.pc_code = b.pc_code and a.item_no = b.item_no )
SET @var_pc=(SELECT a.pc_code FROM inserted a,deleted b where a.db_contract = b.db_Contract and a.cqe_numb = b.cqe_numb and a.pc_code = b.pc_code and a.item_no = b.item_no )
SET @var_item=(SELECT a.item_no FROM inserted a,deleted b where a.db_contract = b.db_Contract and a.cqe_numb = b.cqe_numb and a.pc_code = b.pc_code and a.item_no = b.item_no )
SET @var_fiyr=(SELECT a.fy_item FROM inserted a,deleted b where a.db_contract = b.db_Contract and a.cqe_numb = b.cqe_numb and a.pc_code = b.pc_code and a.item_no = b.item_no )
set @var_chk ="Y"
END
ELSE
BEGIN
SET @var_db_contract=(SELECT a.db_contract FROM inserted a,deleted b where a.db_contract = b.db_Contract and a.cqe_numb = b.cqe_numb and a.pc_code = b.pc_code and a.item_no = b.item_no )
SET @var_cqe=(SELECT a.cqe_numb FROM inserted a,deleted b where a.db_contract = b.db_Contract and a.cqe_numb = b.cqe_numb and a.pc_code = b.pc_code and a.item_no = b.item_no )
SET @var_pc=(SELECT a.pc_code FROM inserted a,deleted b where a.db_contract = b.db_Contract and a.cqe_numb = b.cqe_numb and a.pc_code = b.pc_code and a.item_no = b.item_no )
SET @var_item=(SELECT a.item_no FROM inserted a,deleted b where a.db_contract = b.db_Contract and a.cqe_numb = b.cqe_numb and a.pc_code = b.pc_code and a.item_no = b.item_no )
SET @var_fiyr=(SELECT b.fy_item FROM inserted a,deleted b where a.db_contract = b.db_Contract and a.cqe_numb = b.cqe_numb and a.pc_code = b.pc_code and a.item_no = b.item_no )
set @var_chk="N"
END
SET @var_amt_paid=(SELECT a.amt_paid_item FROM inserted a,deleted b where a.db_contract = b.db_Contract and a.cqe_numb = b.cqe_numb and a.pc_code = b.pc_code and a.item_no = b.item_no )
SET @var_amt_old=(SELECT b.amt_paid_item FROM inserted a,deleted b where a.db_contract = b.db_Contract and a.cqe_numb = b.cqe_numb and a.pc_code = b.pc_code and a.item_no = b.item_no )
SET @var_amt_result =ISNULL(@var_amt_paid,0) - ISNULL(@var_amt_old,0)

SET @var_amt_ret = (SELECT a.amt_ret_item from inserted a,deleted b where a.db_contract = b.db_Contract and a.cqe_numb = b.cqe_numb and a.pc_code = b.pc_code and a.item_no = b.item_no)
SET @var_amt_ret_old=(SELECT b.amt_ret_item from inserted a,deleted b where a.db_contract = b.db_Contract and a.cqe_numb = b.cqe_numb and a.pc_code = b.pc_code and a.item_no = b.item_no)
SET @var_amt_ret_result = isnull(@var_amt_ret,0) - isnull(@var_amt_ret_old,0)

SET @var_quant_new = (SELECT a.quantity from inserted a,deleted b where a.db_contract = b.db_Contract and a.cqe_numb = b.cqe_numb and a.pc_code = b.pc_code and a.item_no = b.item_no)
SET @var_quant_old =(SELECT b.quantity from inserted a,deleted b where a.db_contract = b.db_Contract and a.cqe_numb = b.cqe_numb and a.pc_code = b.pc_code and a.item_no = b.item_no)
SET @var_quant_result = isnull(@var_quant_new,0) - isnull(@var_quant_old,0)
SELECT @item_new = new_item
FROM VALID_ITEM
WHERE DB_CONTRACT = @var_db_contract
AND PC_CODE = @var_PC
AND ITEM_NO = @var_ITEM

UPDATE ae_contract
set amt_paid_contr = isnull(amt_paid_contr,0) +@var_amt_result,
amt_ret_contr = isnull(amt_ret_contr,0) + @var_amt_ret_result
where db_contract = @var_db_contract

IF @item_new = 'N'
BEGIN
update vendor
set used_amt = isnull(used_amt,0) + @var_amt_result + @var_amt_ret_result
where db_vendor = (select gen_contr from ae_contract
where ae_contract.db_contract=@var_db_contract);
END
UPDATE enc_det
set amt_paid_fy = isnull(amt_paid_fy,0) + @var_amt_result,
amt_ret_fy = isnull(amt_ret_fy,0) + @var_amt_ret_result
where db_contract = @var_db_contract
and pc_code = @var_pc
and fy = @var_fiyr

UPDATE valid_item
set tamt_ret_item = isnull(tamt_ret_item,0) + @var_amt_ret_result,
tamt_paid_item = isnull(tamt_paid_item,0) + @var_amt_result,
qtd = isnull(qtd,0) + @var_quant_result
where db_contract = @var_db_contract
and pc_code = @var_pc
and item_no = @var_item

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------------------------
I think, therefore I am - Rene Descartes

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GO

insert into dbo.table1(
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Hello All,

I have been involved in a project wherein i have to delete old records from two table and the corresponding child records from the interlinked tables.
I try to find a SQL Procedure that deletes the child records, but that procedure uses the sysforeignkeys table for recursively deleting the child records.
When i looked at my sysoreignkeys table, it was empty(no rows).
Request you all if you can provide me the SQL Procedure that can delete record in the table with the child records.

Thanks in advance

Regards,
Manoj Kumar

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Feb 28, 2008

how can we delete parent table as well as child table using a single query applied on parent table, can someone please help me onn this topic? it will be very nice of you guys.

Rahul Arora
07 Batch
NCCE Israna,


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IMPOSSIBLE = I+M+POSSIBLE

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Apr 12, 2011

I setup merge replication about 3 weeks ago between a few databases all running SQL 2008 SP1:

DB1 - This database is the publisher and distributor. DB2 - This database is a write-only subscriber (-EXCHANGETYPE 1) to DB1.
DB3 - This database is a write-only subscriber (-EXCHANGETYPE 1) to DB1.
DB4 - This database is a write-only subscriber (-EXCHANGETYPE 1) to DB1.
DB5 - This database is a read-only subscriber (-EXCHANGETYPE 2) to DB1.
DB6 - This database is a read-only subscriber (-EXCHANGETYPE 2) to DB1.

Everything was running fine, then suddenly one at a time the replication jobs for DB2, DB3, and DB4 all started reporting the error:

The Merge Agent failed after detecting that retention-based metadata cleanup has deleted metadata at the Publisher for changes not yet sent to the Subscriber. You must reinitialize the subscription (without upload). (Source: MSSQL_REPL, Error number: MSSQL_REPL-2147199402)

I was able to manually upload data from DB2, DB3, and DB4 to DB1 then reinitialize the subscriptions.  However, I don't understand why only those three subscriptions failed.  I have other merge replication jobs between the same SQL instances that are still running fine.  The only unique thing I can determine about the failed subscriptions is that they are write-only.  I really don't want to make them read/write, as it would cause a lot of unnecessary network traffic to flow between them.

Based on what I've been able to gather, the subscriptions were marked as expired which caused this problem.  If I change subscriptions to never expire to get around this problem, is that going to cause my distribution DB to grow unchecked?  Are there other ways to solve this problem?

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