I am new to SQL Server.
I have to write a trigger for inserting and updating table in different schema in MS SQL.
Example:
TEMP1 table in one Schema
TEMP2 table in another Schema
How can this be done?
As long the SCHEMAs have the same owner (The AUTHORIZATION bit in CREATE SCHEMA) you'd simply refer to the objects using 2 part names.
See CREATE TRIGGER too
create trigger MyTrigger on Schema1.Table1
for insert
as
set nocount on
insert Schema2.Table2 (...)
select (..) from inserted
go
Not sure I understand the problem completely, but basic syntax would look like this:
create trigger MyTrigger on Schema1.Table1
after insert, update
as
insert Schema2.Table2 values(1, 'test', ...)
update Schema3.Table3
set Name = 'XX'
where Id = 1
go
You have to create multiple triggers to handle different events on different tables.
Refer to CREATE TRIGGER (Transact-SQL).
Related
My data is imported through the external system into the SQL Server.
I want to write a trigger that allows all data to be added to the database by default unless they have special conditions to be updated (they must be updated).
I mean, we should search on all input records and if we have some duplicate data (based on the above conditions), the insert operation should not be performed and only the new input data should replace the old data (Update Action).
Could you please help me?
Try this
CREATE TRIGGER TR_YourTable ON dbo.YourTable
FOR INSERT
AS
SET NOCOUNT ON;
DELETE tbl
FROM dbo.YourTable AS tbl
JOIN inserted ON inserted.ID = tbl.ID
WHERE inserted.ID in (select ID from dbo.YourTable);
GO
I am trying to create SQL trigger which adds a new record to the same table where an insertion is made through a web page. I am not exactly sure how to implement it but I tried the following query
CREATE trigger [dbo].[trgI_DealsDoneInserRecord]
on [dbo].[Terms]
after insert
As
Insert into DealsDone
(Company,Grade,Term,Pipeline,[Index],Volume,Price,[Type],CounterParty,
TermID,GradeID,CPID,Locked,Product)
VALUES
(SELECT Company,Grade,Term,Pipeline,[Index],Volume,Price,[Type],CounterParty,
TermID,GradeID,CPID,Locked,Product FROM inserted)
END
The above query threw an error in the SELECT statement in VALUES.
May I know a way to implement this?
Try this:
CREATE trigger [dbo].[trgI_DealsDoneInserRecord]
ON [dbo].[Terms]
AFTER INSERT
As
BEGIN
INSERT INTO DealsDone
(Company,Grade,Term,Pipeline,[Index],Volume,Price,[Type],CounterParty,
TermID,GradeID,CPID,Locked,Product)
SELECT Company,Grade,Term,Pipeline,[Index],Volume,Price,[Type],CounterParty,
TermID,GradeID,CPID,Locked,Product FROM inserted
END
While I generally advocate against using SELECT *, in this case it seems like a benefit:
By not specifying the fields you can automatically account for changes in the tables without having to update this trigger if you add or remove or even rename fields.
This will help you catch errors in schema updates if one of the tables is updated but the other one isn't and the structure is then different. If that happens, the INSERT operation will fail and you don't have to worry about cleaning up bad data.
So use this:
CREATE TRIGGER [dbo].[trgI_DealsDoneInserRecord]
ON [dbo].[Terms]
AFTER INSERT
AS
SET NOCOUNT ON;
INSERT INTO [DealsDone]
SELECT *
FROM inserted;
There is an syntax issue, and also you are missing BEGIN
The basic syntax is
INSERT INTO table2 (column_name(s))
SELECT column_name(s)
FROM table1;
So try this
CREATE trigger [dbo].[trgI_DealsDoneInserRecord]
on [dbo].[Terms]
after insert
As
BEGIN
Insert into DealsDone
(Company,Grade,Term,Pipeline,[Index],Volume,Price,[Type],CounterParty,
TermID,GradeID,CPID,Locked,Product)
SELECT Company,Grade,Term,Pipeline,[Index],Volume,Price,[Type],CounterParty,
TermID,GradeID,CPID,Locked,Product
FROM inserted
END
Refer:- http://technet.microsoft.com/en-us/library/ms188263(v=sql.105).aspx
I have found a trigger example for Creation and Modification of the record but the question is, should I create those two triggers for each table or is there any way to run them on each update and insert regardless of the table name. Of course the names of the fields will be unique for each table for instance "CreationDate", "LastUpdate". Actually first question should have been, is creating a trigger for such a case a correct practice or should I handle it on code behind?
Here is the trigger that I have found on the internet;
CREATE TRIGGER tr[TableName]CreateDate ON [TableName]
FOR INSERT
AS
UPDATE [TableName] SET [TableName].Created=getdate()
FROM [TableName] INNER JOIN Inserted ON [TableName].[UniqueID]= Inserted.[UniqueID]
GO
CREATE TRIGGER tr[TableName]LastModifiedDate ON [TableName]
FOR UPDATE
AS
UPDATE [TableName] SET [TableName].LastModified=getdate()
FROM [TableName] INNER JOIN Inserted ON [TableName].[UniqueID]= Inserted.[UniqueID]
Triggers can be created on DML (Tables, Views events) or DDL (Create, Alter, Drop etc). You can not create a generic trigger which applies to all tables, you need to specify the table name.
You could create a script which automates the Trigger scripts creation for all tables if need be.
More info on: http://msdn.microsoft.com/en-us/library/ms189799.aspx
Just give your trigger the option to run for INSERT AND UPDATE
CREATE TRIGGER [dbo].[tr_TableName] ON [dbo].[TableName] FOR INSERT,DELETE,UPDATE AS
BEGIN
/*
Do stuff here.
*/
Select * from Inserted
Select * from deleted
END
I am trying to create an auditing table. I have a table called person.address in the AdventureWorks 2012 database.
I am using a trigger to capture changes to the table, the only problem is I do not know if it is possible to use a trigger to capture a row BEFORE it is edited. I am trying to save resources and overheads so trying to not use a shadow table. I know there is no "Before Insert" trigger. But is there any way to capture the information contained in a row, and when someone does an insert or update, this row can be written to my audit.table before the insert is completed?
Thank you.
Given a simplistic table with two rows:
CREATE TABLE dbo.foo(a INT PRIMARY KEY);
INSERT dbo.foo(a) VALUES(1),(2);
Then an update trigger simply to demonstrate:
CREATE TRIGGER dbo.trfoo ON dbo.foo FOR UPDATE
AS
BEGIN
SET NOCOUNT ON;
SELECT a FROM inserted;
SELECT a FROM deleted;
END
GO
The result of an action, such as:
UPDATE dbo.foo SET a += 1;
Results in:
a -- this is the *new* version of these rows
----
3
2
a -- this is the *old* version of these rows
----
2
1
Also, there is an INSTEAD OF INSERT trigger, which allows you to perform actions before the insert (they're not called BEFORE triggers because you still have to perform the insert yourself). More info here.
I have a table structure like this:
create table status_master
(
Name varchar(40)
status varchar(10)
)
I need to create trigger for status column if the status column value updated value
FAIL then the trigger invoke one insert commant like:
insert into temp value('s',s's')
Could you please any one give me tha idea to solve this?
Not sure what you really want to achieve - but in SQL Server, you have two types of triggers:
AFTER triggers that fire after INSERT, UPDATE, DELETE
INSTEAD OF triggers which can catch the operation (INSERT, UPDATE, DELETE) and do something instead
SQL Server does not have the BEFORE INSERT/UPDATE/DELETE triggers that other RDBMS have.
You can have any number of AFTER triggers, but only one INSTEAD OF trigger for each operation (INSERT, UPDATE, DELETE).
The more common case is the AFTER trigger, something like:
CREATE TRIGGER trgCheckInsertedValues
ON status_master
AFTER INSERT
AS
BEGIN
INSERT INTO dbo.temp(field1, field2, field3)
SELECT i.Name, i.Status
FROM inserted i
WHERE i.Status = 'FAIL'
END
Here, I am inspecting the "inserted" pseudo-table which contains all rows inserted into your table, and for each row that contains "status = FAIL", you'd be inserting some fields into a "temp" table.
Again - not sure what you really want in detail - but this would be the rough outline how to do it in SQL Server T-SQL code.
Marc
Trigger in SQL, is used to trigger a query when any action perform in the particular table like insert,delete,update
http://allinworld99.blogspot.com/2015/04/triggers-in-sql.html
What you're looking for is an INSTEAD OF INSERT, UPDATE trigger. Within your trigger you attempt the insert or update yourself inside a try-catch. If it errors out then you insert those values into your other table (assuming it's a logging table of some sort).
Assuming what you mean is, should the status's new value be FAIL, then what about this:
triggers reference the new record row as 'inserted' and the old one as 'deleted'
CREATE TRIGGER trgCheckInsertedValues ON status_master AFTER INSERT AS
BEGIN
if inserted.status = 'FAIL'
INSERT INTO dbo.temp(field1, field2, field3)
SELECT i.Name, i.Status, 'anything' FROM inserted i