I have the following table
Data --Table name
ID -- Identity column
PCode -- Postal Code
I created the following trigger:
CREATE TRIGGER Trig
ON Data
FOR INSERT
AS
BEGIN
Select * from inserted
END
And inserted the following values
INSERT INTO Data VALUES (125)
INSERT INTO Data VALUES (126)
INSERT INTO Data VALUES (127)
It shows this:
But I was expecting something like this:
After the 1st insertion, the trigger is executed -> one row is shown in the inserted table.
After the 2nd insertion, the trigger is executed -> two rows are shown in the inserted table.
After the 3rd insertion, the trigger is executed -> three rows are shown in the inserted table.
According to msdn.microsoft all the rows inserted are in this table.
How can I access the inserted table so that I can see all the expected rows and not separately?
You can not. From the Use the inserted and deleted Tables article on microsoft.com, you can read:
The inserted table stores copies of the affected rows during INSERT and UPDATE statements.
That means that the inserted table will only contain rows for the current INSERT or UPDATE statement.
If you do want to see all rows for several such INSERT or UPDATE statements, you will have to store these rows in a table you created yourself.
There are 2 table available in a trigger, the inserted and the deleted. Each update on table XXX is actually a delete row X from XXX then an insert of row X in table XXX. So the inserted inside the trigger is a copy of what got inserted. You can do a lot with a trigger, but triggers are dangerous.
For example, on a performance gig, I found a huge SP being run by a trigger, we dropped it and the database came back online. Or another example, if you do a trigger wrong to audit logins, you can down the server.
As TT mentioned, if you want to see all the inserted records then you need to change your Trigger to something like this:
CREATE TRIGGER Trig
ON Data
FOR INSERT
AS
BEGIN
Select * into "tablename"
from
(Select * from inserted) Ins
END
Related
I have an ORDS enabled schema which accepts bulk JSON records and splits them one by one, and inserts them one by one into UEM table.
I've tried to create a trigger which fetches the last inserted row's id and use that value to insert into another table. The problem is, the trigger below only fetches and inserts the last inserted row's id, and it only does 1 insert.
To be more specific:
ORDS gets a bulk JSON payload which consists of 4 records.
POST handler starts a Procedure which splits these 4 records by line break, and immediately inserts these to CLOB columns of UEM table as 4 separate rows by using "connect by level". There is also the ID column which is automatically created and incremented.
In the parallel I also would like to get the ID of these rows and use it in another table insert. I've created the compound trigger below, but this trigger only retrieves the ID of the last record, and inserts only one row.
Why do you think it behaves like this? In the end, the procedure "inserted" 4 records.
CREATE OR REPLACE TRIGGER TEST_TRIGGER5
FOR INSERT ON UEM
COMPOUND TRIGGER
lastid NUMBER;
AFTER STATEMENT IS
BEGIN
SELECT MAX(ID) INTO lastid FROM UEM;
INSERT INTO SPRINT1 (tenantid, usersessionid, newuser, totalerrorcount, userid) VALUES ('deneme', 'testsessionid', 'yes', lastid, 'asdasfqwqwe');
END AFTER STATEMENT;
END TEST_TRIGGER5;
inserts these to CLOB columns of UEM table as 4 separate rows by using "connect by level".
You have 1 INSERT statement that is inserting 4 rows.
In the parallel I also would like to get the ID of these rows and use it in another table insert. I've created the compound trigger below, but this trigger only retrieves the ID of the last record, and inserts only one row.
Why do you think it behaves like this? In the end, the procedure "inserted" 4 records.
It may have inserted 4 ROWS but there was only 1 STATEMENT and you are using an AFTER STATEMENT trigger. If you want it to run for each row then you need to use a row-level trigger.
CREATE OR REPLACE TRIGGER TEST_TRIGGER5
AFTER INSERT ON UEM
FOR EACH ROW
BEGIN
INSERT INTO SPRINT1 (tenantid, usersessionid, newuser, totalerrorcount, userid)
VALUES ('deneme', 'testsessionid', 'yes', :NEW.id, 'asdasfqwqwe');
END TEST_TRIGGER5;
/
db<>fiddle here
Why? Because it is a statement level trigger. If you wanted it to fire for each row, you'd - obviously - use a row level trigger which has the
for each row
clause.
When insert I need edit a value if it is null. I create a trigger but I don't know how to edit inserted table.
ALTER TRIGGER [trigger1] on [dbo].[table]
instead of insert
as
declare #secuencia bigint, #ID_PERSONA VARCHAR;
select #secuencia = SECUENCIA from inserted
select #ID_PERSONA = ID_PERSONA from inserted
if #secuencia is null begin
set inserted.SECUENCIA = NEXT VALUE FOR SEQ_BIOINTEG --(Sequence)
end
i dont know how to edit inserted table.
You do not. That table is read only.
Note how your trigger also says:
instead of insert
There is no way to edit the inserted table.
What you do instead, is setting up an INSERT command for the original table, using the data from the inserted table to filter to the ROWS of inserted - mostly by a join.
Changing inserted makes no sense, logically - because triggers in SQL are one of two things:
INSTEAD OF - then there is no actual insert happening for inserted to start with. Instead of doing the insert, the trigger is called. As such, changing inserted - makes no sense.
AFTER - then the insert already happened (and you UPDATE the rows). As the trigger runs after the update, changing inserting makes no sense.
Note that I say ROWS - your trigger has one very basic error: it assumes inerted contains ONE row. It is a table - it is possible the changes come from an insert statement that inserts multiple rows (which is trivial, i.e. select into, or simply an insert with values for multiple rows). Handle those.
select #ID_PERSONA = ID_PERSONA from inserted
Makes NO sense - inserted is a table, so ID_PERSONA from inserted contains what value, if 2 rows are inserted? You must treat inserted like any other table.
Apart from all the varied issues with your trigger code, as mentioned by others, the easiest way to use a SEQUENCE value in a table is to just put it in a DEFAULT constraint:
ALTER TABLE dbo.[table]
ADD CONSTRAINT DF_table_seq
DEFAULT (NEXT VALUE FOR dbo.SEQ_BIOINTEG)
FOR SECUENCIA;
I have a simple trigger setup, which is used to insert records into a RentJournal table, whenever there is a record inserted in the UnitAGA table.
The RentJournal table has a primary key ID column named RentJournalID, which is auto incrementing. The UnitAGA table also has a nullable foreign key column named RentJournalID, which links each UnitAGA entry, to its corresponding entry in RentJournal table (which is inserted through the Trigger below).
Problem is that currently this Trigger is only inserting values into RentJournal table. But now I want to also fetch the ID assigned for each RentJournal entry through this Trigger, and write that into the corresponding UnitAGA record, whose insert actually triggered the Trigger in the first place. How do I do this ?
The Trigger code as of right now is this:
USE [RentDB]
GO
ALTER TRIGGER [RTS].[InsertRentJournalEntry]
ON [RTS].[UnitAGA]
AFTER INSERT
AS
BEGIN
INSERT INTO RTS.RentJournal
(UnitId, AdjustmentType, EffectiveDate, ReferenceFormNo)
SELECT
UnitId, 'AGA', EffectiveDate, ReferenceFormNo FROM inserted
END
Have a look at the INSERT logical table that is available in insert triggers:
DML triggers use the deleted and inserted logical (conceptual) tables. They are structurally similar to the table on which the trigger is defined, that is, the table on which the user action is tried. The deleted and inserted tables hold the old values or new values of the rows that may be changed by the user action. For example, to retrieve all values in the deleted table, use: SELECT * FROM deleted
http://technet.microsoft.com/en-us/library/ms189799.aspx
Then use ##IDENTITY to get the value of the identity column on your RentJournal table.
So you should be able to do something like:
update INSERTED set RentJournalID = ##IDENTITY
I've never created a trigger before and I'm trying to read online but am a little confused.
I want to create a trigger on a table that on insert, it will grab some data from different columns and insert it into a few different other tables.
I'm not sure how to write the T-SQL to get the data from the columns..
insert into [othetTable]
values ([col1 from row that was inserted], [col5 from row that was inserted])
What would the syntax be to get those values?
thanks
Use the inserted virtual table that is available to triggers. Note that there could be multiple rows in this table - your trigger could be processing multiple inserts at once.
Therefore, you need to use something like the following syntax:
insert into othertable
select col1, col5
from inserted
This will insert a row into othertable for each inserted row.
I want to write a trigger in SQL Server to insert 2 rows into table2 when a row is inserted into table1. I want to use a column value from table1.
So my trigger looks like this
create trigger triggername on table1
as
begin
insert into
insert into
end
How do I get the value of any column from the last inserted row (the row insertion which fires the trigger). I.e. the equivalent of 'referencing row' in oracle
Triggers in SQL Server fire per statement not per row. There are two pseudo tables inserted and deleted that you can use (for an insert trigger the only one of interest is inserted)
CREATE TRIGGER YourTrigger ON Table1
FOR INSERT
AS
INSERT INTO Table2
SELECT * from inserted /*This will contain multiple rows if it is a multi-row insert*/
hi
i have the solution myself. i missed the alias
select #patient_no=fldL1BasCode from inserted
should be
select #patient_no=i.fldL1BasCode from inserted i