How To Fire A Trigger Without Changing Table Data
Mar 28, 2006
I have tables that I want to fire either an update or insert trigger on.
I could write a script containing a long list of inserts but I'm looking for
something simpler. Would isql work? Any special conditions to get it to
work?
I've tried tricks like 'update x set col = col' or 'update x set col = col +
'' '
All the alternatives seem to have problems. Any ideas?
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Oct 29, 2014
Is there a way to make a sql table trigger fire off conditionally on calling app?We have this vendor app database which also have in-house custom built app operates on them. Some one are thinking using triggers to audit second part of the app activities, but want to skip the vendor app part of operation for at least performance reason.To my knowledge, the answer is no. An insert trigger will fire off whenever there is an insert. It doesn't provide a mechanism to check which app/process first, then conditionally fire or not fire.
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Feb 28, 2007
Hi.I need to make a trigger which fires when after an UPDATE is done ontable A in database X. The trigger must perform a statement whichcopies some of the data from the update to table B in database Y onthe same server.My question is: Can I access the data which caused the trigger to fireor just get an indication of which entry in table A had been updated?Best RegardsJens Christian Andersen.
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Feb 13, 2008
Hi all,
I am sure someone must have run into this before. I have a couple of tables with a parent child relationship.
I created a trigger on the insert of the parent but don't want it to fire until both the parent and child have been inserted into.
However sometimes the child may not get inserted in to at all. In other words it is a 1 to 0 or more relationship.
I created the whole insert into the parent and the child and wrapped it all up in a transaction hoping that the trigger would not fire until the transaction actually completed.
However such is not the case and it fires when the parent is inserted into but nothing is inserted into the child yet even though that is part of the transaction.
Is it possible to postpone trigger fire until after both parent and child table values have been inserted?
Thank you,
John
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Sep 9, 2015
I have two different SQL 2008 servers, I don't have permission to create a linked server in any of them. i created a trigger on server1.table1 to insert the same record to the remote server server2.table1 using OPENROWSET
i created a stored procedure to insert this record, and i have no issue when i execute the stored procedure. it insert the recored into the remote server.
The problem is when i call the stored procedure from trigger, i get an error message.
Stored Procedure:
USE [DB1]
GO
SET ANSI_NULLS ON
GO
SET QUOTED_IDENTIFIER ON
[Code] ....
When i try to insert a new description value in the table i got the following error message:
No row was updated
the data in row 1 was not committed
Error source .Net SqlClient Data provider.
Error Message: the operation could not be performed because OLE DB
provider "SQLNCLI10" for linked server "(null)" returned message "The partner transaction manager has disabled its support for remote/network transaction.".
correct the errors entry or press ESC to cancel the change(s).
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Sep 21, 2005
Is it possible to create a trigger to monitor when a value changes from 1 to 0 in a particular row.
Example, rows have names, pins and status columns. When the status column of a row changes from 1 to 0, I am going to send a mail item to the person whose name has had the status changed.
Mike
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Mar 10, 2007
I am using SQL Server 2005 database for a webbased application built on .net 2.0. Here is my situation. I have a SubmitDate and a Status field in a table. I want the trigger to fire based on the datevalue in the SubmitDate field. SubmitDate field is the last date for the user to submit an application. For eg: if the SubmitDate value is 03/10/07 , I want the trigger to fire on :01 of 03/11/07 to change the Status field value to Inactive. Is that possible? Thoughts on how to do it?
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May 21, 2004
This trigger fired once ONLY during an insert event. My web form inserted 4 news records so it should fire the trigger 4 times correct?
CREATE TRIGGER trInsertImplementationTaskP1
on dbo.ImplementationTasks
FOR INSERT
AS
DECLARE @ITIDint
SELECT @ITID = (SELECT ITid
from inserted)
EXEC TrigSendNewIMAlertP1 @ITID
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Oct 10, 2001
Is this possible?
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Jan 23, 2004
i want to create a trigger that fire after a ady or
fire 4 pm daily
in SQLSERVER
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Feb 1, 2006
I have a trigger on UPDATE on a table. I'm running some maintenanceUPDATE and DELETE queries which I want the trigger to ignore but at thesame time I want other UPDATE queries that other users might be runningto keep triggering the trigger. Is there a SET statement perhaps thatI could set before my query? Or a clause in the UPDATE statement?This is on MSSQL 2000 server, on Win2k3
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Jun 1, 2015
 IF OBJECT_ID('dbo.AuditLog','U') IS NULL BEGIN
CREATE TABLE [dbo].[AuditLog]
[code]....
[AuditLogId] [bigint] IDENTITY(1,1) NOT NULL,
[DateCreated] [datetime] NOT NULL,
[TableName] [nvarchar](200) NULL,
i have the Audit_log table and the trigger above on Account table..it is working fine and i have some 1000 records in Audit log table  , but it did not fire for some customers and i found trigger did not fire for 60 plus customers any possible reasons ??? that trigger did not fire ? Below are the timings account have been created but trigger did not log themÂ
2015-04-29 10:22:08.243
2015-04-29 11:01:49.150
2015-04-29 11:08:16.617
2015-04-29 11:40:34.407
[code]...
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Nov 7, 2006
Hello,i have a table and if a record is inserted i will test a numeric valuein this table. If the this value is greather as 1 million, than anstatus column should be changed from 'A' to 'B'.Yes and sorry, this is a newbie question.On Oracle this work simple:create trigger myTrigger on tableXasbeginif :old.x 100000 then:new.y:='B'end if;end;ThanksMaik
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Nov 15, 2005
Is there a way to fire a trigger when a particular user
(with sql login) logs into sql server?
We are planning to use the above trigger to start a job which inturn records some inf.
Thanks.
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Mar 2, 2015
A job runs every morning at 3.00 am to back up a database. Many of the tables have triggers on to write updates, deletes and inserts to audit tables.A typical trigger looks like this.
USE [ProjectDB_Live]
GO
/****** Object: Trigger [dbo].[trgStakeHolders] Script Date: 03/02/2015 10:23:38 ******/
SET ANSI_NULLS ON
GO
SET QUOTED_IDENTIFIER ON
[code]....
I added a trigger to a table over the weekend - structured the same as the one above and, when the back up ran last night, it copied every row in the table into the audit table as if every row in the table had been updated.
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Oct 19, 2006
Does anyone know how to do the following. I'm trying to mimicreplication with triggers.I have 2 databases, each have these 2 tables.1.USERSID intNAME varchar(20)2.CHANGESTABLE varchar(20)TYPE varchar(10)col1 varchar(20)col2 varchar(20)On the USERS table I have a for insert trigger. Whenever a new user isadded the trigger puts an entry into the CHANGES table such as("USERS", "INSERT", "1", "Fred")I now have an application (vb.net) that monitors the CHANGES table onserver1. If it finds an entry it determines the table using the TABLEcolumn and performs the necessary insert and deletes the entry fromCHANGES. Now the problem is server2 also has an for insert trigger onthe USERS table so it puts an entry into CHANGES on server2. As youcan imagine this goes around in a loop.What I was hoping for was someway of saying, "I'm inserting from myapplication so don't do the trigger".Any ideas gratefully appreciated.Steve.
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Jun 15, 2004
I've gotten conflicting info about this in the past so I thought I'd try to get clarification.
When a record is deleted, I'm sure it fires the delete trigger. Does it also fire the update trigger?
Thanks
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Nov 4, 2015
I created a view that joins several tables together and added an instead of insert, update trigger on it. My trigger works when I do an update/insert directly to the view, but it doesn't seem to fire when an insert/update is made to any of the tables that the view is based on. Is there a way to have the trigger fire when something happens to the tables that the view is based on? The application that the database is using is something that was purchased so I don't have access to the code to change any SQL statements that it's using.
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Feb 28, 2008
Hi, all experts here,
Do we always have to use SCD component for the loading of data into data warehouse to handle changes of rows?
I am looking forward to hearing from you and thank you very much in advance for your help.
With best regards,
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Feb 20, 2004
I have a table that looks like this:
ID Type
123 Phone
123 Meeting
123 Phone
and I would like the data to look like this
ID phone Meeting
123 2 1
How do I do this?
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Sep 20, 2006
hi..
How do i prevent other users from changing the data of my tables? Means one can change data using only my login rest others cannot even DBA or also from server administrator
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Jan 23, 2008
Hi,
I have a trigger set on TABLE1 so that any update to this column should set off trigger to write to the AUDIT log table, it works fine otherwise but not the very first time when table1 has null in the column. if i comment out
and i.req_fname <> d.req_fname from the where clause then it works fine the first time too. Seems like null value of the column is messing things up
Any thoughts?
Here is my t-sql
Insert into dbo.AUDIT (audit_req, audit_new_value, audit_field, audit_user)
select i.req_guid, i.req_fname, 'req_fname', IsNull(i.req_last_update_user,@default_user) as username from inserted i, deleted d
where i.req_guid = d.req_guid
and i.req_fname <> d.req_fname
Thanks,
leo
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Feb 12, 2003
Hi,
I need to prevent modification/update to a field.
So I created a trigger. To take the data from DELETED table then replace the field data.
However, I have problem with one field which data type is text.
MS SQL always return me this error:
Cannot use text, ntext, or image columns in the 'inserted' and 'deleted' tables.
I use the following code to take the data from deleted table
DECLARE @ptrval varbinary(16)
SELECT @ptrval = TEXTPTR(NOTES )
FROM DELETED
I also tried simple Select statement
Select notes from deleted
What code should I use to take the deleted data
Please help.
Thanks in advance
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Apr 10, 2015
I am trying to create a trigger on a table. Let's call it table ABC. Table looks like this:
SET ANSI_NULLS ON
GO
SET QUOTED_IDENTIFIER ON
GO
CREATE TABLE [dbo].[ABC](
[id] [uniqueidentifier] NOT NULL,
[Code] ....
When someone updates a row on table ABC, I want to insert the original values along with the current date and time getdate() into table ABCD with the current date and time into the updateDate field as defined below:
SET ANSI_NULLS ON
GO
SET QUOTED_IDENTIFIER ON
GO
CREATE TABLE [dbo].[ABCD](
[id] [uniqueidentifier] NOT NULL,
[Code] .....
The trigger I've currently written looks like this:
/****** Object: Trigger [dbo].[ABC_trigger] Script Date: 4/10/2015 1:32:33 PM ******/
SET ANSI_NULLS ON
GO
SET QUOTED_IDENTIFIER ON
GO
CREATE TRIGGER [dbo].[ABC_trigger] ON [dbo].[ABC]
[Code] ...
This trigger works, but it inserts all of the rows every time. My question is how can I get the trigger to just insert the last row updated?
I can't sort by uniqueidentifier in descending as those can be random.
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Jul 6, 2015
I need a trigger to know who and when a char(1) column is changed. Â Would like to write the audit trail to its own table I can query and record before and after values.
DDL:
CREATE TABLE [dbo].[Test](
[Customer] [varchar](12) NULL,
[Active] [char](1) NULL DEFAULT ('N') --Must use char 1 b/c more than 2 possible values
)
Insert into Test (Customer, Active) Values ('Acme','Y')..I want trigger to tell me whowhenwhere this value was changed. Â If using sql auth capture client windows id if possible and write to audit table Update Test set Active = 'N'
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Nov 4, 2015
Within a trigger, I'm trying to create a unique table name (using the NEWID()) which I can store the data that is found in the inserted and deleted tables.
Declare @NewID varchar(50) = Replace(convert(Varchar(50),NEWID()),'-','')
Declare @SQLStr varchar(8000)
Set @SQLStr= 'Select * into [TMPIns' + @newID + '] from inserted'
Exec (@SQLStr)
I get the following error: Invalid object name 'inserted'
I know I can do:
Select * into #inserted from inserted
Set @SQLStr= 'Select * into [TMPIns' + @newID + '] from #inserted'
Exec (@SQLStr)
But I don't want to use TempDB as these tables can become big and I also feel that it is redundant. Is there a way to avoid the creation of #inserted?
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Oct 6, 2007
Hi
I am Importing data in datatable using SSIS package . I made trigger on that table on insert. The trigger on insert is not firing on that table
Please help
Thanks
CP
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Nov 14, 2006
Hey,
I'm new to this whole SQL Server 2005 thing as well as database design and I've read up on various ways I can integrate business constraints into my database. I'm not sure which way applies to me, but I could use a helping hand in the right direction.
A quick explanation of the various tables I'm dealing with:
WBS - the Work Breakdown Structure, for example: A - Widget 1, AA - Widget 1 Subsystem 1, and etc.
Impacts - the Risk or Opportunity impacts for the weights of a part/assembly. (See Assemblies have Impacts below)
Allocations - the review of the product in question, say Widget 1, in terms of various weight totals, including all parts. Example - September allocation, Initial Demo allocation, etc. Mostly used for weight history and trending
Parts - There are hundreds of Parts which will eventually lead to thousands. Each part has a WBS element. [Seems redundant, but parts are managed in-house, and WBS elements are cross-company and issued by the Government]
Parts have Allocations - For weight history and trending (see Allocations). Example, Nut 17 can have a September 1st allocation, a September 5th allocation, etc.
Assemblies - Parts are assemblies by themselves and can belong to multiple assemblies. Now, there can be multiple parts on a product, say, an unmanned ground vehicle (UGV), and so those parts can belong to a higher "assembly" [For example, there can be 3 Nut 17's (lower assembly) on Widget 1 Subsystem 2 (higher assembly) and 4 more on Widget 1 Subsystem 5, etc.]. What I'm concerned about is ensuring that the weight roll-ups are accurate for all of the assemblies.
Assemblies have Impacts - There is a risk and opportunity impact setup modeled into this design to allow for a risk or opportunity to be marked on a per-assembly level. That's all this table represents.
A part is allocated a weight and then assigned to an assembly. The Assemblies table holds this hierarchical information - the lower assembly and the higher one, both of which are Parts entries in the [Parts have Allocations] table.
Therefore, to ensure proper weight roll ups in the [Parts have Allocations] table on a per part-basis, I would like to check for any inserts, updates, deletes on both the [Parts have Allocations] table as well as the [Assemblies] table and then re-calculate the weight roll up for every assembly. Now, I'm not sure if this is a huge performance hog, but I do need to keep all the information as up-to-date and as accurate as possible. As such, I'm not sure which method is even correct, although it seems an AFTER DML trigger is in order (from what I've gathered thus far). Keep in mind, this trigger needs to go through and check every WBS or Part and then go through and check all of it's associated assemblies and then ensure the weights are correct by re-summing the weights listed.
If you need the design or create script (table layout), please let me know.
Thanks.
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Jul 20, 2005
Are there any limitations or gotchas to updating the same table whichfired a trigger from within the trigger?Some example code below. Hmmm.... This example seems to be workingfine so it must be something with my specific schema/code. We'reworking on running a SQL trace but if anybody has any input, fireaway.Thanks!create table x(Id int,Account varchar(25),Info int)GOinsert into x values ( 1, 'Smith', 15);insert into x values ( 2, 'SmithX', 25);/* Update trigger tu_x for table x */create trigger tu_xon xfor updateasbegindeclare @TriggerRowCount intset @TriggerRowCount = @@ROWCOUNTif ( @TriggerRowCount = 0 )returnif ( @TriggerRowCount > 1 )beginraiserror( 'tu_x: @@ROWCOUNT[%d] Trigger does not handle @@ROWCOUNT[color=blue]> 1 !', 17, 127, @TriggerRowCount) with seterror, nowait[/color]returnendupdate xsetAccount = left( i.Account, 24) + 'X',Info = i.Infofrom deleted, inserted iwhere x.Account = left( deleted.Account, 24) + 'X'endupdate x set Account = 'Blair', Info = 999 where Account = 'Smith'
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Dec 5, 2006
This Audit Trigger is Generic (i.e. non-"Table Specific") attach it to any tabel and it should work. Be sure and create the 'Audit' table first though.
The following code write audit entries to a Table called
'Audit'
with columns
'ActionType' //varchar
'TableName' //varchar
'PK' //varchar
'FieldName' //varchar
'OldValue' //varchar
'NewValue' //varchar
'ChangeDateTime' //datetime
'ChangeBy' //varchar
using System;
using System.Data;
using System.Data.SqlClient;
using Microsoft.SqlServer.Server;
public partial class Triggers
{
//A Generic Trigger for Insert, Update and Delete Actions on any Table
[Microsoft.SqlServer.Server.SqlTrigger(Name = "AuditTrigger", Event = "FOR INSERT, UPDATE, DELETE")]
public static void AuditTrigger()
{
SqlTriggerContext tcontext = SqlContext.TriggerContext; //Trigger Context
string TName; //Where we store the Altered Table's Name
string User; //Where we will store the Database Username
DataRow iRow; //DataRow to hold the inserted values
DataRow dRow; //DataRow to how the deleted/overwritten values
DataRow aRow; //Audit DataRow to build our Audit entry with
string PKString; //Will temporarily store the Primary Key Column Names and Values here
using (SqlConnection conn = new SqlConnection("context connection=true"))//Our Connection
{
conn.Open();//Open the Connection
//Build the AuditAdapter and Mathcing Table
SqlDataAdapter AuditAdapter = new SqlDataAdapter("SELECT * FROM Audit WHERE 1=0", conn);
DataTable AuditTable = new DataTable();
AuditAdapter.FillSchema(AuditTable, SchemaType.Source);
SqlCommandBuilder AuditCommandBuilder = new SqlCommandBuilder(AuditAdapter);//Populates the Insert command for us
//Get the inserted values
SqlDataAdapter Loader = new SqlDataAdapter("SELECT * from INSERTED", conn);
DataTable inserted = new DataTable();
Loader.Fill(inserted);
//Get the deleted and/or overwritten values
Loader.SelectCommand.CommandText = "SELECT * from DELETED";
DataTable deleted = new DataTable();
Loader.Fill(deleted);
//Retrieve the Name of the Table that currently has a lock from the executing command(i.e. the one that caused this trigger to fire)
SqlCommand cmd = new SqlCommand("SELECT object_name(resource_associated_entity_id) FROM
ys.dm_tran_locks WHERE request_session_id = @@spid and resource_type = 'OBJECT'", conn);
TName = cmd.ExecuteScalar().ToString();
//Retrieve the UserName of the current Database User
SqlCommand curUserCommand = new SqlCommand("SELECT system_user", conn);
User = curUserCommand.ExecuteScalar().ToString();
//Adapted the following command from a T-SQL audit trigger by Nigel Rivett
//http://www.nigelrivett.net/AuditTrailTrigger.html
SqlDataAdapter PKTableAdapter = new SqlDataAdapter(@"SELECT c.COLUMN_NAME
from INFORMATION_SCHEMA.TABLE_CONSTRAINTS pk ,
INFORMATION_SCHEMA.KEY_COLUMN_USAGE c
where pk.TABLE_NAME = '" + TName + @"'
and CONSTRAINT_TYPE = 'PRIMARY KEY'
and c.TABLE_NAME = pk.TABLE_NAME
and c.CONSTRAINT_NAME = pk.CONSTRAINT_NAME", conn);
DataTable PKTable = new DataTable();
PKTableAdapter.Fill(PKTable);
switch (tcontext.TriggerAction)//Switch on the Action occuring on the Table
{
case TriggerAction.Update:
iRow = inserted.Rows[0];//Get the inserted values in row form
dRow = deleted.Rows[0];//Get the overwritten values in row form
PKString = PKStringBuilder(PKTable, iRow);//the the Primary Keys and There values as a string
foreach (DataColumn column in inserted.Columns)//Walk through all possible Table Columns
{
if (!iRow[column.Ordinal].Equals(dRow[column.Ordinal]))//If value changed
{
//Build an Audit Entry
aRow = AuditTable.NewRow();
aRow["ActionType"] = "U";//U for Update
aRow["TableName"] = TName;
aRow["PK"] = PKString;
aRow["FieldName"] = column.ColumnName;
aRow["OldValue"] = dRow[column.Ordinal].ToString();
aRow["NewValue"] = iRow[column.Ordinal].ToString();
aRow["ChangeDateTime"] = DateTime.Now.ToString();
aRow["ChangedBy"] = User;
AuditTable.Rows.InsertAt(aRow, 0);//Insert the entry
}
}
break;
case TriggerAction.Insert:
iRow = inserted.Rows[0];
PKString = PKStringBuilder(PKTable, iRow);
foreach (DataColumn column in inserted.Columns)
{
//Build an Audit Entry
aRow = AuditTable.NewRow();
aRow["ActionType"] = "I";//I for Insert
aRow["TableName"] = TName;
aRow["PK"] = PKString;
aRow["FieldName"] = column.ColumnName;
aRow["OldValue"] = null;
aRow["NewValue"] = iRow[column.Ordinal].ToString();
aRow["ChangeDateTime"] = DateTime.Now.ToString();
aRow["ChangedBy"] = User;
AuditTable.Rows.InsertAt(aRow, 0);//Insert the Entry
}
break;
case TriggerAction.Delete:
dRow = deleted.Rows[0];
PKString = PKStringBuilder(PKTable, dRow);
foreach (DataColumn column in inserted.Columns)
{
//Build and Audit Entry
aRow = AuditTable.NewRow();
aRow["ActionType"] = "D";//D for Delete
aRow["TableName"] = TName;
aRow["PK"] = PKString;
aRow["FieldName"] = column.ColumnName;
aRow["OldValue"] = dRow[column.Ordinal].ToString();
aRow["NewValue"] = null;
aRow["ChangeDateTime"] = DateTime.Now.ToString();
aRow["ChangedBy"] = User;
AuditTable.Rows.InsertAt(aRow, 0);//Insert the Entry
}
break;
default:
//Do Nothing
break;
}
AuditAdapter.Update(AuditTable);//Write all Audit Entries back to AuditTable
conn.Close(); //Close the Connection
}
}
//Helper function that takes a Table of the Primary Key Column Names and the modified rows Values
//and builds a string of the form "<PKColumn1Name=Value1>,PKColumn2Name=Value2>,......"
public static string PKStringBuilder(DataTable primaryKeysTable, DataRow valuesDataRow)
{
string temp = String.Empty;
foreach (DataRow kColumn in primaryKeysTable.Rows)//for all Primary Keys of the Table that is being changed
{
temp = String.Concat(temp, String.Concat("<", kColumn[0].ToString(), "=", valuesDataRow[kColumn[0].ToString)].ToString(), ">,"));
}
return temp;
}
}
The trick was getting the Table Name and the Primary Key Columns.
I hope this code is found useful.
Comments and Suggestion will be much appreciated.
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Oct 30, 2007
Table 1
First_Name
Middle_Name
Surname
John
Ian
Lennon
Mike
Buffalo
Tyson
Tom
Finney
Jones
Table 2
ID
F
M
S
DOB
1
Athony
Harold
Wilson
24/4/67
2
Margaret
Betty
Thathcer
1/1/1808
3
John
Ian
Lennon
2/2/1979
4
Mike
Buffalo
Tyson
3/4/04
5
Tom
Finney
Jones
1/1/2000
I want to be able to create a trigger that updates table 2 when a row is inserted into table 1. However I€™m not sure how to increment the ID in table 2 or to update only the row that has been inserted.
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Feb 5, 2008
A
ID
Name
1
Joe
2
Fred
3
Ian
4
Bill
B
ID
1
4
I want to be able to create a trigger so that when a row is inserted into table A by a specific user then the ID will appear in table B. Is it possible to find out the login id of the user inserting a row?
I believe the trigger should look something like this:
create trigger test_trigger
on a
for insert
as
insert into b(ID)
select i.id
from inserted i
where
--specific USER
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Apr 16, 2014
I have an source file and i have to load it into the data base by changing datatype of the columns in ssis
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