Question

我有一个表格，其列的值由半冒号分隔。关注的是列中的值是不固定的。它从1开始，最后达到80分号。我试图将每个单独的值放在单独的列

SQL SERVER 2008代码

DECLARE @Table TABLE(
        Val VARCHAR(50)
)

INSERT INTO @Table (Val) SELECT '2Xcalcium; kidney' union all SELECT     '3XMagnessium; liver' union all SELECT '2-ECG;3XSODIUM;DIALYSIS'

SELECT  *,
        CAST(LEFT(Val,CHARINDEX(';',Val)-1) AS VARCHAR) FirstValue,
        CAST(RIGHT(Val,LEN(Val) - CHARINDEX(';',Val)) AS VARCHAR) SecondValue
FROM    @Table

我尝试了上面的代码，但这仅限于2个分号。请分享您的专业知识。

Answer 1

提供的大多数链接将元素提取到行中如果您更喜欢使用现有逻辑并将单个元素提取到单独的列中，则可以使用多个级联的CROSS APPLY。

SELECT  t.Val,
    v1.V as V1, 
    v2.V as V2,
    v3.V as V3
FROM    @Table t
    cross apply
    (
        select  V   = LEFT(t.Val, CHARINDEX(';', t.Val + ';') - 1),
            Val = STUFF(t.Val, 1, CHARINDEX(';', t.Val + ';'), '')

    ) v1
    cross apply
    (
        select  V   = LEFT(v1.Val, CHARINDEX(';', v1.Val + ';') - 1),
            Val = STUFF(v1.Val, 1, CHARINDEX(';', v1.Val + ';'), '')

    ) v2
    cross apply
    (
        select  V   = LEFT(v2.Val, CHARINDEX(';', v2.Val + ';') - 1),
            Val = STUFF(v2.Val, 1, CHARINDEX(';', v2.Val + ';'), '')

    ) v3

Answer 2

试试这样：

DECLARE @Table TABLE(
        Val VARCHAR(50)
)

INSERT INTO @Table (Val) SELECT '2Xcalcium; kidney' union all SELECT     '3XMagnessium; liver' union all SELECT '2-ECG;3XSODIUM;DIALYSIS';

;WITH Splitted AS
(
    SELECT *
          ,CAST('<x>' + REPLACE(Val,';','</x><x>') + '</x>' AS XML)  ValuesAsXML
    FROM @Table
)
SELECT  *
       ,ValuesAsXML.value('x[1]','varchar(max)') AS FirstCol
       ,ValuesAsXML.value('x[2]','varchar(max)') AS SecondCol
       ,ValuesAsXML.value('x[3]','varchar(max)') AS ThirdCol
       ,ValuesAsXML.value('x[4]','varchar(max)') AS FourthCol
       ,ValuesAsXML.value('x[5]','varchar(max)') AS FifthCol
FROM    Splitted

结果

Val                     FirstCol     SecondCol  ThirdCol    FourthCol   FifthCol
2Xcalcium; kidney       2Xcalcium    kidney     NULL        NULL        NULL
3XMagnessium; liver     3XMagnessium liver      NULL        NULL        NULL
2-ECG;3XSODIUM;DIALYSIS 2-ECG        3XSODIUM   DIALYSIS    NULL        NULL

Answer 3

根据您的问题，您似乎拥有以下格式的数据。这可以通过numbers表轻松完成..

declare @string varchar(max)
set @string='s,t,a,c,k'



select substring(','+@string+',',n+1,charindex(',',','+@string+',',n+1)-n-1)
from 
numbers 
where n<=len(@string)
and substring(','+@string+',',n,1)=','

<强>输出：

s
t
a
c
k

少数宝石：
https://dba.stackexchange.com/questions/11506/why-are-numbers-tables-invaluable http://sqlperformance.com/2012/07/t-sql-queries/split-strings

分号分隔到sql server中其他列的值

3 个答案: