我有 2 个过程 procgetid,insertmarks.procgetid 返回一个 int 值,该值将在 insertmarks 过程中使用
code in procgetid procedure
:
ALTER procedure [dbo].[procgetid](@sid int output)
as
begin
select @sid=(select isnull(max(id),0)+100 from test2);
return @sid
end
code in insertmarks procedure
:
ALTER procedure [dbo].[insertmarks](@sub1 int,@sub2 int,@sub3 int)
as
declare @student_id int
begin
exec @student_id = procgetid
insert into marks values(@sub1,@sub2,@sub3,@student_id)
end
执行 insertmarks 过程时出现错误“无法将值 NULL 插入到列‘student_id’,列不允许空值。插入失败。”