I'm new to triggers, does anyone know any good resources/articles about creating triggers?
I need to create a trigger for table X, to check BEFORE the update of the table whether a double value for column [X].[Y] exists, if it does (and the value is NOT NULL), do not allow update, if it doesnt allow update/insert statement. This is different from unique keys because as I understand, SQL Server doesnt support multiple NULLs.
Thanks everyone!
Ilya Zherebetskiy
Brainlink Development
http://www.brainlink.com
I have never work with triggers before, so I need a hand on how to create a trigger when a row is updated on a table. Lets says I have this table call "Events" and I want to send the new row to another table call "History". When a new row is inserted I want to select that row and inserted in the History table. Can someone give me a hand with this?
Hi Guys, I have a requirement to create update,delete triggers in all the columns of each table in my development database. I would really appreciate if anyone could guideme or send me the script. Thaks a lot for your consideration Jay
Does anyone know if it's possible to create a trigger on the sysdatabases table in the master database? I keep getting permission denied which I'm not sure is right.
Does anyone know of a way I can create a trigger on a system table (say sysdatabases in master). I know this is not supported but presumably there's a way it can be done by referencing it's equivilant in Information_schema somewhere.
I'm trying to write a script that will automatically set up a backup schedule for a database that has just been created. I was hoping the trigger would query the sysdatabases table for new database name entries, log necessary info in an audit table and then call a backup script to set up the schedule. Any ideas??
I'm trying to use Query Analyzer to create several triggers on different files in the same sql script file. It appears to only allow me to create one trigger at a time in Query Analyzer. How do you separate multiple create trigger statements? Here what I'm trying to do:
CREATE TRIGGER PO_BOL_DELETE ON dbo.PO_BOL FOR DELETE AS
INSERT into PO_Back SELECT *, host_name(), suser_name(), getdate() FROM deleted GO
CREATE TRIGGER RECEIPT_DELETE ON dbo.receipt FOR DELETE AS
INSERT into receipt_Back SELECT *, host_name(), suser_name(), getdate() FROM deleted GO
I am trying to create a trigger to update a table on a different database server. (Both databases are SQL server 7.0) Does anyone know the syntax of how to implement this?
i have setup default transactional replication using locat distributor scheme. I need to create triggers on tables at subscriber side. Can this be done using transaction replication?
This isn€™t an problem as such, it€™s more of a debate.
If a table needs a number of update triggers which do differing tasks, should these triggers be separated out or encapsulated into one all encompassing trigger. Speaking in terms of performance, it doesn€™t make much of an improvement doing either depending upon the tasks performed. I was wondering in terms of maintenance and best practice etc. My view is that if the triggers do totally differing tasks they should be a trigger each on their own.
Is it possible to achieve this using triggers:When someone tries to delete a row in table A, the trigger should first delete a corresponding row in table B and then delete the row in table A. The reason being that, there is a foreign key set on Table B that references table A. So any attempt to delete a row in table A without deleting the corresponding row from B, throws an error.
Hello All, I have to write Trigger for Update, I have two tables, one is for storing records of current values, and one is for storing history of values. How to Write a Trigger on Main Table. As we have Inserted and Deleted Tables through which we can find Values, We dont have any Table for UPDATED Values. Help me. General Problem
I need to create a set of rows every time a new row is inserted into a table. Example (I think this would work)... select @insertedId = column1 from insertedselect @id = column1 from table1 where column2 in (select column1 from table2 where column2 = @insertedId)insert into table3 values(x, y, @id) Is it possible to do the same kind of thing in a situation where the select statement returns multiple values and execute the insert statement for each of these values? Also, if table3 was in fact the table on which the trigger acts, would it then be executed for every row created by the trigger? Sorry if I sound confused. I am.
hi everybody..i tried to put thios loop in sql server 2000 But it is not taking The @ action taken value ,,it is only taking the default value of @actiontaken value. SET @ActionTaken = 'A' IF (@AType = 'A')IF @Status= 'O' IF (@KAppInd ='Y' AND @DAppInd=null)BEGINSET @ActionTaken = 'O'END
Please tell me other option in sql server 2000 for setting variable value based on conditions
Hi using triggers i try to insert some values in to my 2 tables: But its showing teh error as "The request for procedure 'Triginsert123s' failed because 'Triginsert123s' is a trigger object." This is my code in back end: sqlcon.Open() Dim cmd As New SqlCommand("Triginsert123s '" & txtID.Text & "','" & txtName.Text & "','" & txtRole.Text & "','" & txtDep.Text & "'", sqlcon) cmd.ExecuteNonQuery() sqlcon.Close() My trigger is: CREATE TRIGGER Triginsert123s ON [dbo].[EmpRole] FOR INSERT AS declare @Eid as tinyint, @Ename as varchar(50), @Role as char(10) Insert into Emprole(Eid,Ename,Role) values(@Eid,@Ename,@Role) insert into empdep(eid,dep) values(@eid,@Role) Whats the probs?, Plz i am new to triggers help me,
Hi All, I'm using triggers to handle my transaction log to cature inserts and updates. It works fine except if the user clicks on the Save button more than once, the trigger is fired and the record is written to the log even if the record wasn't changed. Does anyone know how to check if the record was actually changed so that it isn't written to the table if it wasn't?
When I execute a stored proc from my asp.net page, will the results of a trigger be returned to my program?
For instance say my stored proc is:
Update Employees set (Lastname = @Lastname) where ID = @ID
And my trigger is:
CREATE TRIGGER tr_Employees_U on Employees FOR UPDATE AS IF UPDATE(lastname) BEGIN RAISERROR ('cannot change lastname', 16, 1) ROLLBACK TRAN RETURN END GO
It seems like since this is an AFTER trigger that my webpage would actually get a valid return code from my stored procedure however the trigger would rollback those changes correct? Or would the trigger get fired and send it's return code to my webpage?
I'm trying to write an instead of trigger for a view in SqlExpress...the table and views are defined as such:CREATE TABLE [dbo].[Work]( [WorkID] [int] IDENTITY(1,1) Primary Key, [ResourceID] [int] NOT NULL, [TaskID] [int] NOT NULL, [WorkDate] [datetime] NOT NULL, [WorkQuantity] [float] NOT NULL, [IsEstimate] [bit] NOT NULL DEFAULT ((0)), [Project] [int] NOT NULL,);CREATE VIEW [dbo].[ActualWork]ASSELECT WorkID, ResourceID, TaskID, WorkDate, WorkQuantity, ProjectFROM dbo.[Work]WHERE (IsEstimate = 0);CREATE VIEW [dbo].[EstimatedWork]ASSELECT WorkID, ResourceID, TaskID, WorkDate, WorkQuantity, ProjectFROM dbo.[Work]WHERE (IsEstimate = 1);Given that, what is wrong with the following create trigger statement:Create Trigger trg_InsertActualWork ondbo.ActualWork Instead of InsertasBEGIN Insert into dbo.Work( ResourceID, TaskID, Project, WorkDate, WorkQuantity, IsEstimate ) values ( inserted.ResourceID, inserted.TaskID, inserted.Project, inserted.WorkDate, inserted.WorkQuantity, 0 );END
l'm trying to build a trigger on a table. The reason for the trigger is to check a certain field for the first three characters if it has ie abc it must update another field in this case loanbook to newabc.How do l write the trigger so that it also check if exists and perform the updates. Please help its Urgent. l've listed the trigger below.
CREATE TRIGGER UpdTest_TRGData ON Test_TRG FOR insert,Update AS
IF left('Loan_No',3)='ABC' update Test_TRG set loanbook = 'NEWABC'
else
IF left('Loan_No',3)='DEF' update Test_TRG set loanbook = 'NEWDEF' where loanbook is null
else
update Test_TRG set loanbook =left('Loan_No',3) where loanbook is null
I'm a bit confused on this bit please elaborate : " FROM Test_TRG t INNER JOIN inserted i ON t.PK = i.PK ". The PK is on which field? Basically this trigger should ensure that on insertion of o new loan if The left(loan_no,3)=MCG and its null then NEWMCG left(loan_no,3)=MCG and its null then NEWMCG left(loan_no,3)=KVS and its null then NEWKVS left(loan_no,3)=MFS and its null then MFS left(loan_no,3)=TCR and its null then TCR left(loan_no,3)=ABL and its null then ABL
Listed below is what l've tried to do but l'm missing the PK part.Otherwise everything else you explained in the script is clear. Thanks man its urgent. When l parse the query its fine , but When l run it l get an error.
CREATE TRIGGER UpdTest_TRGData ON Test_TRG FOR INSERT, UPDATE AS
UPDATE Test_TRG SET LoanBook = CASE WHEN LEFT( i.Loan_No, 3 ) = 'MCG' THEN 'NewMCG' WHEN LEFT( i.Loan_No, 3 ) = 'KVS' AND i.LoanBook IS NULL THEN 'NewKVS' WHEN LEFT( i.Loan_No, 3 ) = 'MFS' AND i.LoanBook IS NULL THEN 'MFS' WHEN LEFT( i.Loan_No, 3 ) = 'ABL' AND i.LoanBook IS NULL THEN 'ABL'
WHEN i.LoanBook IS NULL THEN LEFT( i.Loan_No, 3 ) END FROM Test_TRG t INNER JOIN inserted i ON t.PK = i.PK -- Fill in Primary Key or other Join Column(s) WHERE LEFT( i.Loan_No, 3 ) = 'MCG' OR ( LEFT( i.Loan_No, 3 ) = 'KVS' AND i.LoanBook IS NULL ) OR i.LoanBook IS NULL
====== Error message =================
Server: Msg 207, Level 16, State 3, Procedure UpdTest_TRGData, Line 11 Invalid column name 'PK'. Server: Msg 207, Level 16, State 1, Procedure UpdTest_TRGData, Line 11 Invalid column name 'PK'.
I an loading records from a flat file into a table, which is done everyday by a scheduled job in SQL Server 7.0.
How can I make sure that if the job is run twice in a day for some reason that the same rows are not inserted into the table again? Do I have to write a insert trigger on the table ??? If so how can I achive the objective ??
I'm working on trying to figure out how to update the child table from the parent via a trigger. This works fine as long as the value is in the child table. If it's not, then I get my foreign key violation. So, My next thought was to simply put in a begin tran / rollback tran within the trigger... My question is this : If I have multiple triggers on the parent table all based on the update of the key field (and the child tables... some 7 of them) all have FK's, if I rollback one trigger does it rollback the entire transaction? Or just the functionality of that trigger? From what I've read, it appears as if it's the entire transaction... if so, how do I get a trigger to 'ignore' itself or not fire based on a select criteria that i have within that same trigger...
I just tried creating my first trigger and I'm a little bit confused. I am trying to see if certain fields have changed and will do that by checking the values of the fields in the "master" table and the "Inserted" table. I wasn't sure which table would have the old data and which would have the new, so I created the following trigger to help me determine which was which:
CREATE Trigger upd_cost_master On tbl_cost_master For Insert, Update As
To my surprise, @U_Name and @O_Name contained the same values. I though that one table contained the old values and one contained the new. Was I wrong? If so, is there anyway to compare the Old and New values through a trigger?
I'm using SQL Server 7.0. I have an insert trigger on table t05r. I populate table t05r with a DTS package. The trigger is supposed to add the record which was inserted into t05r, into t39r. After I run the DTS package to populate t05r, I checked t39r and no records where added. What is going wrong? Is it that DTS uses bulk copy and triggers don't fire on bulk copy?
I have an insert trigger on table A which inserts records into table B. This insertion into B fails( or may fail ) at certain conditions. I do not want the insertion into A to be affected because of this. Any ways to achieve this ?
I've update triggers on my table, But for some of the transactions, I don't want the triggers to fire. I know in Sybase there are set triggers off. In MS SQL, Is there any similar commands which will set triggers off for particular sql statements.
Hi! I am having trouble with setting triggers while doing my project. The project is on ATM machine driven through SQL. So I have Date of Transaction in one table and Account Expiry in another.
I want to set the trigger to check Account expiry when doing transaction so i wrote T-SQL
select........ getDate()-Dateoftransaction=expiry begin '...' end
the system saying I have got an error near the word 'begin'.
I am desperately needing help. running out of ideas.
I need to create an after insert, update and delete trigger on the same table. Can I create one trigger that would have all three operations in it or I need to create three separate triggers? Thanks for your help.
I have not used triggers before and wanted to know if it was approproate for my issue:
When a new user registers via the web, a record is inserted into the "student" table. I would also like to insert a record into the "StudentCourse" table that adds this new student to a class (studentID, CourseID). I thought I could look into a trigger or stored procedure for this. The problem is that I do not want to mess with the programming side of it as it is an off the shelf system and written in Java/JSP, so I would like to handle this in the DB. Thanks in advance,
