2 sql statements in one trigger?

Greetings,
I am working with the Oracle 10g Database. While creating several triggers I am encountering quite some problems. In fact, I want to do 2 steps in one trigger. Is that possible? e.g:
Before Update on table for each row
begin
Update table set column=Max(column)+1 where column = 0 and ID = :old.ID;
then
Insert into table values (column1, column2, column3, column)
values (:new.column1, :new.column2, :new.column3, :new.column)
end;
What I want to do is that before an update on the table
1st: update current row and set one value to the max of the column + 1
2nd: insert the new values which are given by the original update statement with the value for the column = 0, which indicates later that this row is the newest one.
Is that somehow possible? I just read that normally you only have one DML statement per trigger. The problem is that both update and insert statement need to be triggered at the same time everytime someone tries to update values of the current table.
best regards
Jörn

> The problem is that I have more than 30 tables with
history, creating a history table for each would be
very bad...
Why is it bad to have 30 history tables? I currently work with an application having 141 history tables. Nothing bad about it over here.
> And lets say i am not the man who first intended this
structure, i am just the one who has to build up the
database as told ;-) So the history should be zero
for the latest version.
We are just saying that your current implementation isn't the best one out there for storing history. As said, you would have to circumvent the mutating table problem. And you would have to take special care about the multi-user situation where two sessions are updating/inserting at the same time and you wouldn't want both to use the same max(column)+1.
Using a history table is an alternative, and so is introducing a "creation_date" column and selecting the rows with the max(creation_date) as your current row.
Regards,
Rob.

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>
Dave Packard wrote:
> Good day, everyone!
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Hi,
Remove the ORDER BY clause in all the queries expcept lastone. Then it will work.
You can have the ORDER BY clause in the last query of the inline view. Otherwise it will give the error.
Run the query given below
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--NBA
SELECT decode(t.league_id, 1, 'NBA') AS league,
t.moniker AS FIRST,
t.last_name AS LAST,
(t.to_team_name || ' ' || to_team_nickname) AS team,
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FROM customer_data.cd_bk_trans t, customer_data.cd_bk_roster r
WHERE t.player_id = r.player_id
AND t.trans_type_id IN (12, 13, 14)
AND r.status = 'Y'
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t.last_name,
t.moniker,
t.to_team_name,
t.to_team_nickname
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--MLB
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t.moniker AS FIRST,
t.last_name AS LAST,
(t.from_team_name || ' ' || from_team_nickname) AS team,
COUNT(*) suspensions
FROM customer_data.cd_baseball_trans t,
customer_data.cd_baseball_roster r
WHERE t.player_id = r.player_id
AND t.comments LIKE '%Susp%'
AND r.status = 'Y'
AND r.league_id = 07
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t.last_name,
t.moniker,
t.from_team_name,
t.from_team_nickname
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t.fn AS FIRST,
t.ln AS LAST,
(t.from_team_name || ' ' || from_team_nickname) AS team,
COUNT(*) suspensions
FROM customer_data.cd_nhl_trans t, customer_data.cd_nhl_roster r
WHERE t.player_id = r.player_id
AND t.trans_type IN (10, 11, 12)
AND r.status = 'Y'
AND r.league_id = 18
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t.ln,
t.fn,
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t.last_name AS LAST,
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AND t.trans_type_id IN (24, 25)
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t.from_team_name,
t.from_team_nickname
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Message was edited by:
user473327

I am having trouble doing this, I have been banging
my head against mydesk all day. the biggest thing is
thowing me off is that the good value can be higher
or lower than the bad value, and I am having trouble
visualizing how to but this conditional statement in
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;)

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