How To Create A Trigger To Update A Field
Aug 2, 2007
Hi -
I know my way around VS but I am just exploring "advanced" SQL Server 2005 and have run into a challenge which I think a trigger could solve, but I am not sure and also don't know how to set that up. So any help or links to tutorials are highly appreciated.
Here is the challenge: I have a table with a number of fields, among them RequestID (bigint) and Booktime (datetime). What I would like to happen is whenever someone writes a value different from NULL into RequestID, Booktime gets set to the current timestamp. When RequestID gets set to NULL, Booktime gets set to NULL.
Is there a way to do this with a trigger (or an otherwise elegant way)?
Thanks in advance for ANY help or ideas.
Oliver
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Nov 11, 2013
I want to update a field with a trigger only if a specific field is updated.
When I try the code below, it updates the field when any field in the record is updated. Is there a way to only make look at picked_dt?
ALTER TRIGGER [dbo].[UpdatePickedDate]
on [dbo].[oeordlin_sql]
after update
AS
BEGIN
-- SET NOCOUNT ON added to prevent extra result sets from
[Code] .....
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Feb 21, 2013
I'm tracking sales reps and the companies they represent. I have 2 tables. A header table that has the SalesRep (a key field) the name, phone, address, etc.A line file that will have the sales rep multiple times, each line having a vendor they represent.
SalesRepHeader table:
SalesRep name phone VendorList
Bob Bob_Smith 111-222-3333
John John_Young 123-456-56789
Mary Mary_Kerns 567-876-98765
[code]...
Whenever the SalesRepLine file is added to or updated I want the header file field VendorList to be updated with a concat of the vendors for this sales rep so the SalesRepHeader file would look like this.
SalesRep name phone VendorList
Bob Bob_Smith 111-222-3333 Samsung, Kenwood, JVC
John John_Young 123-456-56789 Apple, HP
I need the update to be automatic.
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May 8, 2008
Hi,
I have a table with somefields, here i will only mention on which i need to perform an action, possibly with the use of Trigger.
Fields = Active, inactiveDate
Active Field is of bit datatype mean conatins 1 or 0,
1 means the user is active, but when i change the active field to 0, and make the user inactive i want the date to be populated automatically to inactiveDate field when active field is changed to 0.
any help is much appreciated
NAUMAN
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Aug 17, 2007
Hi,
I have the following situation.
I have one table named as "Order", and other table as "Shipment". Now, I want to check if one column name "Status" in the "Ă–rder" table has been changed (when it becomes status = 7) then I need to insert records in "Shipment" table.
Order Table:
OID===Order_Product===Order_Description===Order_Status
Shipment Table:
SID===Shipment_Description===DateTime===Status
I tried to create a trigger, but it is not working properly;
Create Trigger trg_InsertShipment ON [dbo].[Order]
FOR Update
AS
INSERT INTO Shipment
(
SID,
Shipment_Description,
DateTime,
Status
)
Select
'001' as SID,
'Nothing' as Shipment_Description,
'01/01/2007' as DateTime,
'Ready' as Status
WHERE Order.Status = 7
===============================================================
But it inserts the records into Shipment Table every time the status field or any other field in the Order Table is changed. What I want is that, "When Status Column in Order Table is Updated to 7, then insert record in Shipment Table".
How can I do that???
Thanks in advance...
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Aug 14, 2006
Dear Experts,I'm an Oracle guy, who is being given more SQL Server assignmentslately.I've been looking for things on the web about this, but I can'tanything so far.In Oracle, I you can create a trigger on a table that -only- fires ifcertain fields are updated.create or replace trigger trg_some_triggerBEFORE insertOF some_field1, some_field2on tbl_some_tablefor each row....Is this also possible in SQL Server?What is the syntax please?Thanks a lot!
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Feb 5, 2005
Hi,
I'm using DataAdapter.Update() to update data in a table. My question is; how do I create a trigger that works after the update has completely finished?
For example if my update adds 50 new rows to a table the trigger I've currently got fires after each new row that is added ie 50 times in total. Is it possible to get it to trigger after the last (ie 50th) row is added???
Thanks
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Jun 24, 2008
please help create trigger condition on update
IF EXISTS
(
SELECT *
FROM empList
WHERE (unit = 9)
)
begin
update [dbo].[empList]
set unit = CASE WHEN SELECT na,empID, unit
FROM empList
WHERE (empID IN (111, 222, 333, 555)) AND (unit = 9))
then '4' else t.fld1 end
i have an emmployee table
empid unit
------------------------------------------------------
1111 3
2222 9
3333 9
4444 2
5555 2
6666 1
7777 9
8888 2
9999 9
-----------------------------
i need help create trigger condition on update like this
ONLY ON
EMPID=2222,3333,7777,9999
WHAN ON UPDATE they have unit =9 THAN
I NEED THE trigger DO THIS
empid unit
------------------------------------------------------
1111 3
2222 4
3333 4
4444 2
5555 2
6666 1
7777 4
8888 2
9999 4
ONLY IF someone update EMPID=2222 OR 3333 OR 7777 OR 9999 and UNIT=9
THAN automatic change 9 TO 4
TNX for the help
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Apr 30, 2007
hi,CAn i have one trigger for both Update and DeleteDelete Trigger---------------------create Trigger [tr_delete_user_log]on [dbo].[user_log] for deleteasbegininsert into z_user_log select * from deletedendTrigger Update---------------------CREATE Trigger [tr_update_user_log]on [dbo].[user_log] for updateasbegininsert into z_user_log select * from deletedendCan i have one trigger instead of these Triggers ..
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Aug 28, 2007
I want to create a trigger that, when a field is updated or a record is inserted, counts the number of words in "field1", inserting this numeric value into another field in the same table. What would be the most efficient, fastest method for doing this?
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Jun 4, 2007
Hi
Apologies if this is a silly question
I have a basic table "Customer" which has
Id
Address1
Address2
Address3
Town
County
Postcode
SearchData
After I insert or Update a row in this table I need to update the SearchData column
with
UPPER(ADDRESS1) + UPPER(ADDRESS2) + UPPER(TOWN) + UPPER(POSTCODE)
only for that Id
I'm sure this is only a basic update but all the examples I can find are for inserting into other tables not the row itself.
Regards
David
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Feb 10, 2004
I have never used triggers before and I have tried to solve one problem. If I have the column "currency" in a table and want to make sure that the entered value i valid in relation to another table that contains valid currency formats, I did it like this:
---------------------------------
CREATE TRIGGER [trigger_checkCurrency] ON [dbo].[Client]
FOR INSERT, UPDATE
AS
declare @currency as char(50)
declare @country as char(50)
declare cur cursor for SELECT currency, country
FROMinserted
OPEN cur
fetch cur into @currency, @country
WHILE @@FETCH_STATUS = 0
BEGIN
if not exists(select * from listinfoid where listname = 'currency' and listid = @currency)
begin
set @currency = (cast(@currency as varchar (3)) + ' is not a valid currency')
CLOSE cur
DEALLOCATE cur
RAISERROR (@currency,16,-1) with log
return
end
if not exists(select * from listinfoid where listname = 'country' and listid = @country)
begin
set @country = (cast(@country as varchar (3)) + ' is not a valid contry')
CLOSE cur
DEALLOCATE cur
RAISERROR (@country,16,-1) with log
return
end
else
fetch cur into @currency, @country
END
CLOSE cur
DEALLOCATE cur
update Client set currency = UPPER(currency), country = UPPER(country)
---------------------------------
I use a cursor to handle multiple rows in an update query.
(SQL2000-server)
Is there an easier och better way to do this?
I´m a bit unsure of this code.
Thanx!
/Erik
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Apr 11, 2008
How to create trigger to stop the delete , updation and insert in the table of database ....
How can i stopped .......................I want to apply on whole table of database
Pls help me out.
Yaman
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Jan 11, 2008
Hi everyoneI am trying to create a DELETE Trigger. I have 2 tables. Table1 andTable2. Table 2 has all the same fields and records as Table1 + 1extra column "date_removed"I would like that when a record is deleted from Table 1, the triggerfinds that record in Table2 and updates the date_removed filed withcurrent time stamp.The primary key on both is combination of domain,admin_group and cn.CREATE TRIGGER [tr_updateTable2] ON [dbo].tbl_Table1FOR DELETEASUpdate Table2SET date_removed = getDate()I'm stuck here, how do I manipulate on Table2 only the records thatwere deleted on Table1, so to only update date_removed filed for themin Table2?I guess i need to compare domain, cn and admin_group, but I don't knowhow.Any help would be greatly appreciatedThanks! :-)
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Jan 24, 2008
how to do this
i have table of employee ,evry employee have a unique ID "empid"
empid VAL_OK
--------------------------
111 0
222 0
333 0
now insert multiple insert to my work_table shifts for all month for evry employee
like this
(this is work_table)
empid date val
--------------------------------------------------
111 01/02/2008 1
111 02/02/2008 2
...............
111 29/02/2008 5
--next employee
222 01/02/2008 1
222 02/02/2008 4
...............
222 29/02/2008 6
--next employee
333
--next employee
444
--next employee
555
-------------------------------------------------------------
now i need for evry OK insert (for all month) each employee
go to the TB_Employee
and update each employee once !!
from VAL_OK=0 to VAL_OK=1
like this
empid VAL_OK
--------------------------
111 1
222 1
333 1
----------------------
like this i know who is the employee have shift for all month and who NOT !
i think it like this
Code Snippet
Create trigger for_insert on tb_work
For insert
begin
if @@rowcount = 1
Update tb_employee
Set
val_ok= 1
else
/* when @@rowcount is greater than 1,
use a group by clause */
Update tb_employee
set
val_ok= 1
select empid from tb_work
group by tb_work.empid
End
TNX
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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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Jul 20, 2005
I am trying to populate a field in a SQL table based on the valuesreturned from using substring on a text field.Example:Field Name = RecNumField Value = 024071023The 7th and 8th character of this number is the year. I am able toget those digits by saying substring(recnum,7,2) and I get '02'. Nowwhat I need to do is determine if this is >= 50 then concatenate a'19' to the front of it or if it is less that '50' concatenate a '20'.This particular example should return '2002'. Then I want to take theresult of this and populate a field called TaxYear.Any help would be greatly apprecaietd.Mark
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Mar 18, 2008
how to create new CLR trigger from existing T-Sql Trigger Thanks in advance
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Jan 3, 2005
hi!
I have a big problem. If anyone can help.
I want to retrieve the last update time of database. Whenever any update or delete or insert happend to my database i want to store and retrieve that time.
I know one way is that i have to make a table that will store the datetime field and system trigger / trigger that can update this field record whenever any update insert or deletion occur in database.
But i don't know exactly how to do the coding for this?
Is there any other way to do this?
can DBCC help to retrieve this info?
Please advise me how to do this.
Thanks in advance.
Vaibhav
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Jul 8, 2015
I have a table where table row gets updated multiple times(each column will be filled) based on telephone call in data.
Â
Initially, I have implemented after insert trigger on ROW level thinking that the whole row is inserted into table will all column values at a time. But the issue is all columns are values are not filled at once, but observed that while telephone call in data, there are multiple updates to the row (i.e multiple updates in the sense - column data in row is updated step by step),
I thought to implement after update trigger , but when it comes to the performance will be decreased for each and every hit while row update.
I need to implement after update trigger that should be fired on column level instead of Row level to improve the performance?
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May 30, 2008
Hi,
I am not sure if this is the right forum to post this question.
I run an update statement like "Update mytable set status='S' " on the SQL 2005 management Studio.
When I run "select * from mytable" for a few seconds all status = "S". After a few seconds all status turn to "H".
This is a behaviour when you have an update trigger for the table. But I don't see any triggers under this table.
What else would cause the database automatically change my update?
Could there be any other place I should look for an update trigger on this table?
Thanks,
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Apr 16, 2015
If I have a table with 1 or more Nullable fields and I want to make sure that when an INSERT or UPDATE occurs and one or more of these fields are left to NULL either explicitly or implicitly is there I can set these to non-null values without interfering with the INSERT or UPDATE in as far as the other fields in the table?
EXAMPLE:
CREATE TABLE dbo.MYTABLE(
ID NUMERIC(18,0) IDENTITY(1,1) NOT NULL,
FirstName VARCHAR(50) NULL,
LastName VARCHAR(50) NULL,
[Code] ....
If an INSERT looks like any of the following what can I do to change the NULL being assigned to DateAdded to a real date, preferable the value of GetDate() at the time of the insert? I've heard of INSTEAD of Triggers but I'm not trying tto over rise the entire INSERT or update just the on (maybe 2) fields that are being left as null or explicitly set to null. The same would apply for any UPDATE where DateModified is not specified or explicitly set to NULL. I would want to change it so that DateModified is not null on any UPDATE.
INSERT INTO dbo.MYTABLE( FirstName, LastName, DateAdded)
VALUES('John','Smith',NULL)
INSERT INTO dbo.MYTABLE( FirstName, LastName)
VALUES('John','Smith')
INSERT INTO dbo.MYTABLE( FirstName, LastName, DateAdded)
SELECT FirstName, LastName, NULL
FROM MYOTHERTABLE
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Feb 15, 2008
Hello
I've to write an trigger for the following action
When a entry is done in the table Adoscat79 having in the index field Statut_tiers the valeur 1 and a date in data_cloture for a customer xyz
all the entries in the same table where the no_tiers is the same as the one entered (many entriers) should have those both field updated
statut_tiers to 1
and date_cloture to the same date as entered
the same action has to be done when an update is done and the valeur is set to 1 for the statut_tiers and a date entered in the field date_clture
thank you for your help
I've never done a trigger before
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Mar 30, 2004
Hi all,
I have a problem about a query to update a table
UPDATE Email SET EmailDT='31 Mar 2004' WHERE Idx={BDF51DBD-9E4F-4990-A751-5B25D071E288}
where Idx field is a uniqueidentifier type and EmailDT is datetime type. I found that when this query calling by a VB app. then it have error "[Microsoft][ODBC SQL Server Driver]Syntax error or access violation" and i have tried again in Query Analyzer, same error also occur, the MS SQL server is version 7. Please help. thanks.
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May 12, 2006
Not a SQL guy but can do enough to be dangerous :)Trying to update a record. We have records that have a field with datasurrounded by some comment text such as *** Previous Public Solution*** Start and *** Previous Public Solution *** End . What I am tryingto do is write a SQL statement that will:Check that field C100 = TICKET0001 (to test with one record beforerunning on whole db)Check that field C101 is = ClosedCheck that field C102 is nullCopy field C103 data to field C102 and strip out any words such as ***Previous Public Solution *** Start and *** Previous Public Solution*** endThanks for any help!Kevin
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May 10, 2006
I want to update two tables in one page. So I created two FormView bound on two SqlDataSource controls, and I create a Update button on the bottom of page. And I writen some codes as below:
btnUpate_Click(object sender, EventArgs e){
sqlDataSource1.Update();
sqlDateSource2.Update();}
But, the records haven't updated.
In SqlDataSource2_Updating() function, I found all the parameters is null.
So, how to modify my code to do it.
Zhang
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Dec 17, 2001
I have an update trigger which fires from a transactiion table to update a parent record in another table. I am getting no errors, but also no update. Any help appreciated (see script below)
create trigger tr_cmsUpdt_meds on dbo.medisp for UPDATE as
if update(pstat)
begin
update med
set REC_FLAG = 2
from deleted dt
where med.uniq_id = dt.uniq_id
and dt.pstat = 2
and dt.spec_flag = 'kop'
end
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May 30, 2008
I am trying to update a fields with an UPDATE statement but I keep getting the error message when I run the query.
Subquery returned more than 1 value. This is not permitted when the subquery follows =, !=, <, <= , >, >= or when the subquery is used as an expression.
I have this Update trigger that I know is causing the error message because I guess it's not built to manage multi-row updates.
Can someone help me re-write it. I also tried using the WHERE p.ID = p.ID but when I do that it modifies all rows in the modifieddate column instead of just the cells/rows that I'm updating
ALTER TRIGGER [dbo].[MultitrigCA]
ON [dbo].[ProdDesc]
AFTER UPDATE
AS
SET NOCOUNT ON
IF UPDATE (codeabbreviation)
UPDATE p
sET p.ModifiedDate = GETDATE()
FROM ProdDesc AS p
WHERE p.ID = (SELECT ID FROM inserted)
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Jul 20, 2005
Hi there,I'm a little stuck and would like some helpI need to create an update trigger which will run an update query onanother table.However, What I need to do is update the other table with the changedrecord value from the table which has the trigger.Can someone please show me how this is done please??I can write both queries, but am unsure as to how to get the value ofthe changed record for use in my trigger???Please helpM3ckon*** Sent via Developersdex http://www.developersdex.com ***Don't just participate in USENET...get rewarded for it!
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Apr 3, 2008
hi!
i have a database with about 20 tables. i appended to each table a column "UpdatedOn", and i want to write a trigger to set the date of the update date in that column, using a trigger.
i want to avoid the trigger launching for the last column (UpdatedOn).
how can i detect the rows that changed, and modify only the update date/time?
i read something about TableName_Inserted and TableName_Deleted, but i would prefer to copy as generic as possible the data from there, meaning, not to write column names in my script.
another idea i thought about was to prevent the trigger executing if no other column except for UpdatedOn changed, but... i encounter some trouble, when i try to pass column name (as string) to UPDATE() function.(Error: Expecting ID or QUOTED_ID)
thank you in advance.
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Oct 31, 2012
In Access, you have a combo with column designations for example me.combofield.column(x) and you can update another field with those column(x) values.
How do you do it in MS SQL?
I didn't mean "from a 'combo' field'" in SQL(!) I just want to reproduce the equivalent of an Access combo box.
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Feb 23, 2007
HiI have a table called cur and i want one of the fields to contain a value of two other fields multiplied togetherTable 'cur' Fields ID, A, B, Cfield C must = A*BI have this so far and it works but updates ALL of the fields C rows______________________________________________ALTER TRIGGER TG_cur ON cur AFTER INSERTAS BEGINUpdate curSET C = (i.A*i.B)from inserted i_______________________________________________RESULT:ID|A|B|C1 - 3 - 4 -202 - 6 - 6 -203 - 8 - 9 -204 - 2 - 3 -205 - 4 - 5 -20I think need a where statement at the bottom but the followings does not workwhere ID = i.IDREQUIRED RESULTID|A|B|C1 - 3 - 4 -122 - 6 - 6 -363 - 8 - 9 -764 - 2 - 3 -65 - 4 - 5 -20any help would be greatmany thanksBil
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May 30, 2008
Have a table with the following data.
Table1
Ord_no inv_no amt Account freefield3
25 125 100.00 1444
25 125 10.00 3555 Rebate
25 125 10.00 3555 Rebate
After the records are inserted I need to add the amt's where freefield3 equals rebate then subtract that sum from the amt where account = 1444. So my final result would be to have 80.00 in the amt field where account equals 1444
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