9

ユーザーが tableHelloWorldsを変更した場合、「実行したアクション」、実行した時間、元の行のコピーを に挿入する必要がありHelloWorldsHistoryます。

列の長さのために、挿入、更新、および削除アクションの個別のトリガーは避けたいと思います。

私はこれを試しました:

create trigger [HelloWorlds_After_IUD] on [HelloWorlds]
FOR insert, update, delete
as
if @@rowcount = 0 
return
if exists (select 1 from inserted) and not exists (select 1 from deleted)
begin
insert into HelloWorldHistory (hwh_action, ..long column list..)
select 'INSERT', helloWorld.id, helloWorld.text ... and more from inserted
end
else
    if exists (select 1 from inserted) and exists (select 1 from deleted)
    begin
insert into HelloWorldHistory (hwh_action, ..long column list..)
select 'UPDATE', helloWorld.id, helloWorld.text ... and more from deleted 
    end
    else
    begin
insert into HelloWorldHistory (hwh_action, ..long column list..)
select 'DELETE', helloWorld.id, helloWorld.text ... and more from deleted
    end
end

挿入物が表示されるのを見たことはありませんが、更新は見ました。列リストを維持するのは楽しくありませんが、3 つの別々のトリガーを試すつもりです。

4

2 に答える 2

23

次のようなものを試してください:

CREATE TRIGGER YourTrigger ON YourTable
   AFTER INSERT,UPDATE,DELETE
AS

DECLARE @HistoryType    char(1) --"I"=insert, "U"=update, "D"=delete

SET @HistoryType=NULL

IF EXISTS (SELECT * FROM INSERTED)
BEGIN
    IF EXISTS (SELECT * FROM DELETED)
    BEGIN
        --UPDATE
        SET @HistoryType='U'
    END
    ELSE
    BEGIN
        --INSERT
        SET @HistoryType='I'
    END
    --handle insert or update data
    INSERT INTO YourLog
            (ActionType,ActionDate,.....)
        SELECT
            @HistoryType,GETDATE(),.....
            FROM INSERTED

END
ELSE IF EXISTS(SELECT * FROM DELETED)
BEGIN
    --DELETE
    SET @HistoryType='D'

    --handle delete data, insert into both the history and the log tables
    INSERT INTO YourLog
            (ActionType,ActionDate,.....)
        SELECT
            @HistoryType,GETDATE(),.....
            FROM DELETED

END
--ELSE
--BEGIN
--    both INSERTED and DELETED are empty, no rows affected
--END
于 2010-12-08T19:27:51.853 に答える
7

挿入された列と削除された列の行を関連付ける(一致させる)必要があります。このようなものの方がうまくいくはずです。

create trigger [HelloWorlds_After_IUD] on [HelloWorlds]
FOR insert, update, delete
as

insert into HeloWorldsHistory
select 'INSERT', helloWorld.id, helloWorld.text ... and more 
from inserted
where myKeyColumn not in (select myKeyColumn from deleted)

insert into HeloWorldsHistory
select 'DELETE', helloWorld.id, helloWorld.text ... and more 
from deleted
where myKeyColumn not in (select myKeyColumn from inserted)

insert into HeloWorldsHistory
select 'UPDATE', helloWorld.id, helloWorld.text ... and more 
from inserted
where myKeyColumn in (select myKeyColumn from deleted)
于 2010-12-08T19:30:50.910 に答える