我有一个存储过程,它对 pnd 分页进行排序,就像Scott Michell的排序自定义分页结果一样。
我有两张桌子:Article
和Category
。我的存储过程适用于Article
表,但我想将表中的一列添加Category
到查询中(我的意思是内连接)。
实际上我不能像 Scott Michell 那样做,因为两个表中都有一些相似的列(当我一直喜欢 Scott 时,我得到“Ambiguous Column Error”)。
我没有内部连接的存储过程是:
set ANSI_NULLS ON
set QUOTED_IDENTIFIER ON
go
ALTER PROCEDURE [dbo].[sp_Articles_SelectByCategoryId]
@CategoryId int,
@startRowIndex int = -1,
@maximumRows int = -1,
@sortExpression nvarchar(50),
@recordCount int = NULL OUTPUT
AS
IF (@recordCount IS NOT NULL)
BEGIN
SET @recordCount = (SELECT COUNT(*)
FROM [dbo].[Articles]
WHERE [CategoryId] = @CategoryId)
RETURN
END
IF LEN(@sortExpression) = 0
SET @sortExpression = 'Id'
DECLARE @sql nvarchar(4000)
SET @sql = 'SELECT [Id], [AddedDate], [AddedBy], [CategoryId],
[Title], [Abstract], [Body]
FROM
(SELECT
[Id], [AddedDate], [AddedBy], [CategoryId],
[Title], [Abstract], [Body],
ROW_NUMBER() OVER(ORDER BY ' + @sortExpression + ') as RowNum
FROM [dbo].[Articles]
WHERE CategoryId = ' + CONVERT(nvarchar(10), @CategoryId) + ') as CategoryIdInfo
WHERE ((RowNum between (' + CONVERT(nvarchar(10), @startRowIndex) + ') AND ' + CONVERT(nvarchar(10), @startRowIndex) + ' + ' + CONVERT(nvarchar(10), @maximumRows) + ' - 1)
OR ' + CONVERT(nvarchar(10), @startRowIndex) + ' = -1 OR ' + CONVERT(nvarchar(10), @maximumRows) + ' = -1)'
-- Execute the SQL query
EXEC sp_executesql @sql
我的Category
桌子是:
CREATE TABLE [dbo].[Category]
(
[Id] [int] IDENTITY(1,1) NOT NULL,
[AddedDate] [datetime] NOT NULL,
[AddedBy] [nvarchar](250) COLLATE Arabic_CI_AS NOT NULL,
[Title] [nvarchar](50) COLLATE Arabic_CI_AS NOT NULL,
[Importance] [int] NOT NULL,
[Description] [nvarchar](300) COLLATE Arabic_CI_AS NULL,
[ImageUrl] [nvarchar](50) COLLATE Arabic_CI_AS NULL,
CONSTRAINT [PK_Category]
PRIMARY KEY CLUSTERED ([Id] ASC)
)
我的Article
桌子:
CREATE TABLE [dbo].[Articles]
(
[Id] [int] IDENTITY(1,1) NOT NULL,
[AddedDate] [datetime] NOT NULL,
[AddedBy] [nvarchar](250) COLLATE Arabic_CI_AS NOT NULL,
[CategoryId] [int] NOT NULL,
[Title] [nvarchar](255) COLLATE Arabic_CI_AS NOT NULL,
[Abstract] [nvarchar](4000) COLLATE Arabic_CI_AS NULL,
[Body] [nvarchar](max) COLLATE Arabic_CI_AS NOT NULL,
[ReleaseDate] [datetime] NULL,
[ExpireDate] [datetime] NULL,
[Approved] [bit] NOT NULL,
[Listed] [bit] NOT NULL,
[CommentEnabled] [bit] NOT NULL,
[OnlyForMembers] [bit] NOT NULL,
[ViewCount] [int] NOT NULL,
[Votes] [int] NOT NULL,
[TotalRating] [int] NOT NULL,
CONSTRAINT [PK_Articles] PRIMARY KEY CLUSTERED
(
[Id] ASC
)WITH (PAD_INDEX = OFF, STATISTICS_NORECOMPUTE = OFF, IGNORE_DUP_KEY = OFF, ALLOW_ROW_LOCKS = ON, ALLOW_PAGE_LOCKS = ON) ON [PRIMARY]
) ON [PRIMARY]
我不知道如何将“类别”表的“标题”列添加到查询中。
如果我的Category
表没有类似的字段,那么这个查询肯定有效:
DECLARE @sql nvarchar(4000)
SET @sql =
'SELECT
[Id],
[AddedDate],
[AddedBy],
[CategoryId],
[Title],
[Abstract],
[Body],
ArticleTitle
FROM
(SELECT
[Id],
[AddedDate],
[AddedBy],
a.[CategoryId],
[Title],
[Abstract],
[Body],
b.Title as CategoryTitle ,
ROW_NUMBER() OVER(ORDER BY ' + @sortExpression + ') as RowNum
FROM [dbo].[Articles] a INNER JOIN Category b on a.CategoryId = b.Id
WHERE a.CategoryId = ' + CONVERT(nvarchar(10), @CategoryId) + '
) as CategoryIdInfo
如果你想测试你可以下载附件(表格和存储过程) 谢谢