Question

我在SQL server中创建了函数和视图。我原谅了他们，他们成功地存放了。现在我应该写什么来在另一个查询中使用这些视图或函数？！

我试过了

select something
from   FunctionName;

但是系统没有重新认识该功能。

功能是：

create function TableOfDecades () 
returns @functiontable table
(
    decadeBegin int,
    decadeEnd       int,
    NumOfMovies int
)
as
begin
    declare @movie1 int;
    declare @movie2 int;
    declare @movie3 int;
    declare @movie4 int;
    declare @movie5 int;
    declare @year1  int;
    declare @year2  int;

    select @movie1 = count(id)
    from MOVIE
    where year >=1350 and year <1360;

    select @movie2 = count(id)
    from MOVIE
    where year >=1360 and year <1370;

    select @movie3 = count(id)
    from MOVIE
    where year >=1370 and year <1380;

    select @movie4 = count(id)
    from MOVIE
    where year >=1380 and year <1390;

    select @movie5 = count(id)
    from MOVIE
    where year >=1390 and year <1400;

    declare @maxOfMovies int;
    set @maxOfMovies = -1;

    if( @movie1 > @maxOfMovies )
    begin
        set @maxOfMovies = @movie1;
        set @year1 = 1350;
        set @year2 = 1360;
    end

    if( @movie2 > @maxOfMovies )
    begin
        set @maxOfMovies = @movie2;
        set @year1 = 1360;
        set @year2 = 1370;
    end

    if( @movie3 > @maxOfMovies )
    begin
        set @maxOfMovies = @movie3;
        set @year1 = 1370;
        set @year2 = 1380;
    end

    if( @movie4 > @maxOfMovies )
    begin
        set @maxOfMovies = @movie4;
        set @year1 = 1380;
        set @year2 = 1390;
    end

    if( @movie5 > @maxOfMovies )
    begin
        set @maxOfMovies = @movie5;
        set @year1 = 1390;
        set @year2 = 1400;
    end

    insert into @functiontable
        select @maxOfMovies, @year1, @year2;

    RETURN;
end

我执行了它并保存在文件夹programmability-＆gt; functions-＆gt;表值函数

Answer 1

以下应该工作..

SELECT decadeBegin, decadeEnd, NumOfMovies
FROM dbo.TableOfDecades();

Answer 2

你的函数需要专门返回一个Table类型才能被另一个sql调用使用。见http://technet.microsoft.com/en-us/library/ms191165%28v=sql.105%29.aspx

SQL的不同实现具有不同的格式，用于引用表值函数..

在sql中使用函数或视图

2 个答案: