查找重复在SQL Server

我有一个这样的talble ..查找重复在SQL Server

BookId  BookName          BookProvider 

1     Angels and deamons      Amazon 
2     Angels and deamons      Amazon 
3     Angels and deamons      Ebay 
4     Tuesdays        Amazon     
5     SQL 101         Ebay

我想发现是相同的，存在于多个唯一BookProvider所有的书名，我该怎么办，在一个SQL查询？在这个例子中，我想检索记录1和2，因为书名是相同的，它可以在亚马逊和eBay上找到。

来源

2016-10-20 MTplus

是否要在结果中包含BookProviders？ – jarlh

你可以举一个例子或更多的细节，它不明确 – mhmd

你想要第1和第2行吗？不是3？ – jarlh

此方法返回多行所有书籍一样BookProvider：

WITH cte AS 
(
    SELECT *, COUNT(*) OVER (PARTITION BY BookProvider, BookName) AS cnt 
    FROM @BookTable TT 
) 
SELECT * 
FROM cte 
WHERE cnt > 1;

来源

2016-10-20 08:27:31 dnoeth

谢谢，这解决了我的问题:) – MTplus

试试这个

select BookName from table 
group by BookName 
having count(distinct BookProvider)>1

来源

2016-10-20 07:45:31 Madhivanan

DECLARE @BookProvider TABLE(
    Id int 
    ,BookName VARCHAR(100) 
    ,BookProvider VARCHAR(100) 
) 

INSERT INTO @BookProvider 
VALUES(1, 'Angels and Demons', 'Amazon') 
INSERT INTO @BookProvider 
VALUES(2, 'Angels and Demons', 'Ebay') 
INSERT INTO @BookProvider 
VALUES(3, 'Tuesdays', 'Amazon') 
INSERT INTO @BookProvider 
VALUES(4, 'SQL 101', 'Ebay') 

SELECT BookName, COUNT(DISTINCT BookProvider) as Count FROM @BookProvider 
GROUP BY BookName 
HAVING COUNT(DISTINCT BookProvider) > 1

结果：

+-------------------+-------+ 
|  BookName  | Count | 
+-------------------+-------+ 
| Angels and Demons |  2 | 
+-------------------+-------+

来源

2016-10-20 07:46:25 CSL

这样的：

select count(bookname),bookname from tablename group by bookname having count(bookname)>1

来源

2016-10-20 07:47:06

对不起，我在第一个问题上犯了一个错误，我需要它基于独特的Book提供者。我更新了最初的帖子.. – MTplus

你想完整行，包括BOOKID和BookProviders？有一个子查询返回可以在多个商店中找到的书名。加入那个结果。

select t1.* 
from tablename t1 
join (select BookName from tablename 
     group by BookName 
     having count(distinct BookProvider) > 1) t2 
    on t1.BookName = t2.BookName

来源

2016-10-20 07:49:44 jarlh

如果要查看所有的书和他们的计数你甚至可以使用一个CTE与partion还有：

DECLARE @BookTable TABLE 
(
    BookId int, 
    BookName varchar(100), 
    BookProvider varchar(100) 
) 

INSERT INTO @BookTable 
(
    BookId, 
    BookName, 
    BookProvider 
) 
VALUES 
(1, 'Angel and Demons', 'Amazon'), 
(2, 'Angel and Demons', 'EBay'), 
(3, 'Tuesdays','Amazon'), 
(4, 'SQL 101', 'Amazon'); 

WITH BookCte 
AS 
(
    SELECT *, ROW_NUMBER() OVER (PARTITION BY TT.BookName ORDER BY TT.BookName) as RowNumber FROM @BookTable TT 
) 

SELECT * FROM BookCte BC

来源

2016-10-20 07:56:30 Draco

查找重复在SQL Server

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