SQL笔记(1)索引/触发器

--创建聚集索引
create clustered index ix_tbl_test_DocDate
on tbl_test(DocDate)
with fillfactor=30
GO

--创建非聚集索引
create nonclustered index ix_tbl_test_DocNo
on tbl_test(DocNo)
with fillfactor=30
GO

--删除索引
drop index tbl_test.ix_tbl_test_DocDate
drop index tbl_test.ix_tbl_test_DocNo
GO

--创建触发器
create trigger trg_udf_test_TransLine
on tbl_test
for insert,delete,update
as
    --update
    if exists(select 1 from inserted) and exists(select 1 from deleted)
        update a set a.DocNo=b.DocNo,a.DocLineNo=b.DocLineNo,a.Org=b.Org,a.Wh=b.Wh,a.DocDate=b.DocDate,
        a.ItemInfo_ItemID=b.ItemInfo_ItemID,a.StoreMainQty=b.StoreMainQty,a.Direction=b.Direction
        from tbl_A a
        inner join inserted b on a.ID=b.ID
    --insert
    else if exists(select 1 from inserted)
        insert into tbl_A(ID,DocNo,DocLineNo,Org,Wh,ItemInfo_ItemID,StoreMainQty,DocDate,Direction)
        select ID,DocNo,DocLineNo,Org,Wh,ItemInfo_ItemID,StoreMainQty,DocDate,Direction
        from inserted
    --delete
    else if exists(select 1 from deleted)
        delete from tbl_A where ID in(select ID from deleted)
GO

--禁用触发器
alter table tbl_test disable trigger trg_udf_test_TransLine

--启用触发器
alter table tbl_test enable  trigger trg_udf_test_TransLine

--删除触发器
drop trigger trg_udf_test_TransLine
GO