我有“GetConversationPaged”sp,它从名为“user_messages_index”的表中选择分页数据,并在名为“social_user_messages”的表中包含“lastmesage”。 我不确定它是否可以微调,但它可以解决一件事。我想通过lastMessageId对“Row_number”进行排序,我选择MAX(messageId)。
PS:我有消息索引和消息表,因为我希望人们向多个收件人发送相同的消息。我不是一遍又一遍地插入相同的消息,而是使用索引表
那么,我如何按最新消息ID排序结果?
这是表格和sps我正在使用
- 索引表 -
CREATE TABLE [dbo].[social_user_messages_index](
[senderId] [int] NOT NULL,
[recipientId] [int] NOT NULL,
[messageId] [int] NOT NULL,
[isRead] [bit] NOT NULL
) ON [PRIMARY]
- 消息表 -
CREATE TABLE [dbo].[social_user_messages](
[id] [int] IDENTITY(1,1) NOT NULL,
[message] [nvarchar](1000) NOT NULL,
[sendDate] [datetime] NOT NULL,
) ON [PRIMARY]
- SP -
ALTER PROCEDURE [dbo].[GetConversationPaged]
@userId int,
@isRead bit,
@PageNumber int,
@PageSize int
AS
BEGIN
DECLARE @FirstRow INT, @LastRow INT, @RowCount INT, @PageCount INT
--- find recordcount and pages
SELECT @RowCount = COUNT(1) OVER(),
@PageCount = COUNT(*) OVER() / @PageSize
FROM social_user_mesages_index s
WHERE s.recipientId = @userId and s.isRead=@isRead
GROUP BY senderId
--- calculate pages
IF @RowCount % @PageSize != 0 SET @PageCount = @PageCount + 1
IF @PageNumber < 1 SET @PageNumber = 1
IF @PageNumber > @PageCount SET @PageNumber = @PageCount
--- select paging data
SELECT currentpage = @PageNumber, totalpages = @PageCount, totalrows = @RowCount
SET @FirstRow = ( @PageNumber - 1 ) * @PageSize + 1;
SET @LastRow = ( @PageNumber - 1 ) * @PageSize + @PageSize;
--- select records
WITH mytable
AS (
SELECT Row_number() OVER (ORDER BY (SELECT 1)) AS rownumber,
(Select name from domains_users d where d.id=s.senderId) as senderName,
(select MAX(messageId)) as lastMessageId,
(select m.[message] from social_user_messages m where m.id = (select MAX(messageId))) as [message]
--,(select m.sendDate from social_user_messages m where m.id = (select MAX(messageId))) as lastMessageDate
,senderId
FROM social_user_mesages_index s
WHERE s.recipientId = @userId and s.isRead=@isRead
GROUP BY senderId
)
SELECT *
FROM mytable
WHERE rownumber BETWEEN @FirstRow AND @LastRow
ORDER BY rownumber ASC;
END
答案 0 :(得分:3)
在您的CTE中,您的social_user_messages_index拼写错误。我还删除了你有几个地方的Group BY SenderId
,并更新了CTE。如果这不符合你的意愿,请告诉我,我可以调整它:
ALTER PROCEDURE [dbo].[GetConversationPaged]
@userId int,
@isRead bit,
@PageNumber int,
@PageSize int
AS
BEGIN
DECLARE @FirstRow INT, @LastRow INT, @RowCount INT, @PageCount INT
--- find recordcount and pages
SELECT @RowCount = COUNT(1) OVER()
, @PageCount = COUNT(*) OVER() / @PageSize
FROM dbo.social_user_messages_index AS s
WHERE s.recipientId = @userId and s.isRead=@isRead
--- calculate pages
IF @RowCount % @PageSize != 0 SET @PageCount = @PageCount + 1
IF @PageNumber < 1 SET @PageNumber = 1
IF @PageNumber > @PageCount SET @PageNumber = @PageCount
--- select paging data
SELECT currentpage = @PageNumber
, totalpages = @PageCount
, totalrows = @RowCount;
SET @FirstRow = ( @PageNumber - 1 ) * @PageSize + 1;
SET @LastRow = ( @PageNumber - 1 ) * @PageSize + @PageSize;
--- select records
WITH mytable AS
(
SELECT Row_number() OVER (ORDER BY MessageId DESC) AS rownumber
, du.name as senderName
, m.Message
, senderId
FROM social_user_messages_index AS s
INNER JOIN dbo.domains_users AS du ON s.SenderId = du.id
INNER JOIN dbo.social_user_messages AS m ON s.messageId = m.id
WHERE s.recipientId = @userId
AND s.isRead=@isRead
)
SELECT *
FROM mytable
WHERE rownumber BETWEEN @FirstRow AND @LastRow
ORDER BY rownumber ASC;
END