逗号分离后的SQL中的第三名

Question

我有一个字符串，我想要逗号之后的第三个单词。

id    String
1     India,Pakistan,China,Turkey,England
2     USA,UK,Pakistan,India
3     China,North Korea,Turkey,Iran

所需的结果将为

id    String
1     China
2     Pakistan
3     Turkey

Answer 1

您可以像这样使用 xml value

DECLARE @SampleData AS TABLE 
(
   Id int IDENTITY (1,1),
   String varchar(200)
)
INSERT INTO @SampleData
VALUES (' India,Pakistan,China,Turkey,England'), ('USA,UK,Pakistan,India'),('China,North Korea,Turkey,Iran')

;WITH temps AS 
(
   SELECT sd.Id ,CAST('<x>' + replace(sd.String, ',', '</x><x>') + '</x>' as xml) AS String
   FROM @SampleData sd
)
SELECT t.Id, t.String.value('(/x)[3]','varchar(50)') 
FROM temps t

Answer 2

可以使用

实现所需的输出

语法：

SELECT COALESCE(LTRIM(CAST(('<X>'+REPLACE(<column_name>,',' ,'</X><X>')+'</X>') AS XML).value('(/X)[3]', 'varchar(100)')), '') AS String
FROM <table_name>

针对所讨论的表的自定义查询：

SELECT id, 
    COALESCE(LTRIM(CAST(('<X>'+REPLACE(String,',' ,'</X><X>')+'</X>') AS XML).value('(/X)[3]', 'varchar(100)')), '') AS String
FROM table_1