查找重複在SQL Server

我有一個這樣的talble ..查找重複在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

我想發現是相同的，存在於多個唯一BookProvider所有的書名，我該怎麼辦，在一個SQL查詢？在這個例子中，我想檢索記錄1和2，因爲書名是相同的，它可以在亞馬遜和eBay上找到。

來源

2016-10-20 MTplus

是否要在結果中包含BookProviders？ – jarlh

你可以舉一個例子或更多的細節，它不明確 – mhmd

你想要第1和第2行嗎？不是3？ – jarlh

此方法返回多行所有書籍一樣BookProvider：

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

來源

2016-10-20 08:27:31 dnoeth

謝謝，這解決了我的問題:) – MTplus

試試這個

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

來源

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

結果：

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

來源

2016-10-20 07:46:25 CSL

這樣的：

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

來源

2016-10-20 07:47:06

對不起，我在第一個問題上犯了一個錯誤，我需要它基於獨特的Book提供者。我更新了最初的帖子.. – MTplus

你想完整行，包括BOOKID和BookProviders？有一個子查詢返回可以在多個商店中找到的書名。加入那個結果。

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

來源

2016-10-20 07:49:44 jarlh

如果要查看所有的書和他們的計數你甚至可以使用一個CTE與partion還有：

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

來源

2016-10-20 07:56:30 Draco

查找重複在SQL Server

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