Question

首先，我是SQL的初学者。

我在表格中有一个名为State的列，其中包含如下所示的数据

State
Karnataka
Uttar Pradesh
Tamilnadu
Telangana
Kerela
Andhra Pradesh

我想知道每个州有多少个元音，每个元音的结果应该是分开的。

预期产出：

State         Count of a   Count of e   Count of i   Count of o   Count of u
Karnataka     4            0            0            0            0
Uttar Pradesh 2            1            0            0            1

Answer 1

请尝试以下SQL：

SELECT 
State,
LEN(state)-LEN(REPLACE(state,'a','')) 'Count of a',
LEN(state)-LEN(REPLACE(state,'e','')) 'Count of e',
LEN(state)-LEN(REPLACE(state,'i','')) 'Count of i',
LEN(state)-LEN(REPLACE(state,'o','')) 'Count of o',
LEN(state)-LEN(REPLACE(state,'u','')) 'Count of u' 
FROM TableName

Answer 2

使用PIVOT：

CREATE TABLE #TEST ([STATE] NVARCHAR(MAX))

INSERT INTO #TEST VALUES ('Karnataka'     )
INSERT INTO #TEST VALUES ('Uttar Pradesh' )
INSERT INTO #TEST VALUES ('Tamilnadu'     )
INSERT INTO #TEST VALUES ('Telangana'     )
INSERT INTO #TEST VALUES ('Kerela'        )
INSERT INTO #TEST VALUES ('Andhra Pradesh')

SELECT * 
FROM
(
SELECT [STATE], N, LEN([STATE]) - LEN(REPLACE([STATE], N,'')) AS VOWELCOUNT
FROM #TEST
CROSS JOIN  (VALUES('A'),('E'),('I'),('O'),('U')) AS A(N)
) PVT
PIVOT (MAX(VOWELCOUNT) FOR N IN ([A],[E],[I],[O],[U])) AS D

SQL：如何在字符串中分别计算每个元音的数量

2 个答案: