字符在SQL Server數

Question

輸入：AA1

輸出將是：

Char Count 
A  2 
1  1 

Answer 1

這是更容易，因爲它的簡單計數，而該個連續程序計數您的其他問題。

DECLARE @Numbers TABLE (Num smallint NOT NULL PRIMARY KEY) 

INSERT @Numbers (Num) 
SELECT TOP 12 
    ROW_NUMBER() OVER (ORDER BY c1.NAME) 
FROM 
    sys.columns c1 

DECLARE @STuff TABLE (Seq char(12) NOT NULL PRIMARY KEY) 

INSERT @STuff (Seq) VALUES ('12AABCCDDDDE') 
INSERT @STuff (Seq) VALUES ('333345RRRR11') 

SELECT 
    Seq, Single, COUNT(*) 
FROM 
    @Numbers N 
    CROSS APPLY 
    (SELECT Seq, SUBSTRING(Seq, Num, 1) AS Single FROM @Stuff) S 
GROUP BY 
    Seq, Single 
HAVING 
    COUNT(*) > 1 
ORDER BY 
    Seq, Single