Question

我有两张桌子。当我为特定列插入新值时，我想更新第二个表中的另一列。我怎么能这样做？

这是一个简单的示例，但它提供了“关键字'插入'附近的语法错误。”错误如预期。

Create trigger trigger_Insert_Months
on [Quantities]
after Insert
As 
if Insert([Work Name])
begin
    declare @NewWorkName varchar(200)
    select @NewWorkName = [Work Name] from inserted
    insert into [April]([Work Name])
    values (@NewWorkName)
End

Answer 1

试试这个：

CREATE TRIGGER trigger_Insert_Months
ON [Quantities]
AFTER INSERT
AS 
BEGIN
    INSERT INTO [April]([Work Name])
    SELECT [Work Name] from inserted
    WHERE NOT EXISTS (SELECT 1 FROM [Quantities] WHERE [Quantities].[Work Name] = INSERTED.[Work Name] AND INSERTED.PrimaryKey != [Quantities].[PrimaryKey])
End

Answer 2

如果我错了，请纠正我。您希望在table1中插入值，并使用插入的值更新table2中的值。

create trigger tr1 on Table1
for insert 
as
begin
if exists (select 1 from inserted)
begin
update a
set a.col1 = b.col
from table2 as a
inner join (select * from inserted) as b
on a.id = b.id
end
end

此代码在Table1中发生插入时激活触发器，并使用插入的行更新col1的table2的值。使用table2中的主键和table1更改ID列，将col1更改为要在table2中更新的列

插入特定列

2 个答案: