查找字符串分隔符的位置（SQL Server）的

Question

我有一个字符串变量

测试=哈里亚| 123 |男|学生|主妇

我使用|作为分隔符。如果我想从第二次出现的管道提取数据直到第三次出现。我需要从上面的字符串中获得'MALE'。

任何帮助理解

Answer 1

未测试

SELECT 
    SUBSTRING (
     @test, 
     CHARINDEX('|', @test, CHARINDEX('|', @test) + 1) + 1, 
     CHARINDEX('|', @test, CHARINDEX('|', @test, CHARINDEX('|', @test) + 1) + 1) - 1 
    ) 

甲更好的方式将所述字符串分割成一个表，并使用ROW_NUMBER（）以提取第三元件。在此基础上Arrays and Lists in SQL Server

DECLARE @test varchar(100) = 'HARIA|123|MALE|STUDENT|HOUSEWIFE' 

SELECT TOP 8000 
    Num 
INTO 
    #Number 
FROM 
    (
    SELECT 
     ROW_NUMBER() OVER (ORDER BY c1.object_id) AS Num 
    FROM 
     sys.columns c1, sys.columns c2, sys.columns c3 
    ) N 

SELECT 
    ROW_NUMBER() OVER (ORDER BY Num) AS Rank, 
    LTRIM(RTRIM(SUBSTRING(@test, 
          Num, 
          CHARINDEX('|', @test + '|', Num) - Num 
       ))) AS Value 
FROM 
    #Number 
WHERE 
    Num <= LEN (@test) 
    AND 
    SUBSTRING('|' + @test, Num, 1) = '|' 

DROP TABLE #Number 

Answer 2

尝试此

解决方案1：（使用数表）

declare @str varchar(1000) 
set @str ='HARIA|123|MALE|STUDENT|HOUSEWIFE' 
--Creating a number table 
;with numcte as( 
select 1 as rn union all select rn+1 from numcte where rn<LEN(@str)), 
--Get the position of the "|" charecters 
GetDelimitedCharPos as(
select ROW_NUMBER() over(order by getdate()) seq, rn,delimitedcharpos 
from numcte 
cross apply(select SUBSTRING(@str,rn,1)delimitedcharpos) X where delimitedcharpos = '|') 

--Applying the formula SUBSTRING(@str,startseq + 1,endseq-startseq + 1) 
-- i.e. SUBSTRING(@str,11,15-11) in this case 

select top 1 SUBSTRING(
    @str 
    ,(select top 1 rn+1 from GetDelimitedCharPos where seq =2) 
    ,(select top 1 rn from GetDelimitedCharPos where seq =3) - 
    (select top 1 rn+1 from GetDelimitedCharPos where seq =2) 
    ) DesiredResult 
from GetDelimitedCharPos 

解决方案2：（使用XQuery）

DECLARE @xml as xml,@str as varchar(100),@delimiter as varchar(10) 
SET @str='HARIA|123|MALE|STUDENT|HOUSEWIFE' 
SET @xml = cast(('<X>'+replace(@str,'|' ,'</X><X>')+'</X>') as xml) 
SELECT ShrededData as DesiredResult FROM(
SELECT 
ROW_NUMBER() over(order by getdate()) rn 
,N.value('.', 'varchar(10)') as ShrededData FROM @xml.nodes('X') as T(N))X 
WHERE X.rn = 3 -- Specifying the destination sequence value(here 3) 

输出（在这两种情况下）

DesiredResult 
MALE 

Answer 3

我找到this。使用t-Sql for循环。很好的语法参考。