TSQL - 获取列结果被“中的”运营商

Question

我尝试使用下面的选择为“从”为100K +记录

--select * 
from [Node-4-127].location [l] 
inner join [Node-4-127 ].zone [z] 
on l.[address.zip] in (substring (replace (z.zips, '*',  ''', '''),4, 4000)) 

样本行进行更新读为多个字符串结果是：

'91301', '91320', '91361', '91362', '91377', '91358', '91360', 

我裹导致括号内为“中”，但它的治疗的整个结果为1名的字符串，而不是把每个援引结果作为括号内的独立字符串。

任何想法将不胜感激。

Answer 1

首先，使用杰夫MODEN的CSV分离装置从我answer here

CREATE FUNCTION [dbo].[DelimitedSplit8K] 
--===== Define I/O parameters 
     (@pString VARCHAR(8000), @pDelimiter CHAR(1)) 
--WARNING!!! DO NOT USE MAX DATA-TYPES HERE! IT WILL KILL PERFORMANCE! 
RETURNS TABLE WITH SCHEMABINDING AS 
RETURN 
--===== "Inline" CTE Driven "Tally Table" produces values from 1 up to 10,000... 
    -- enough to cover VARCHAR(8000) 
WITH E1(N) AS (
      SELECT 1 UNION ALL SELECT 1 UNION ALL SELECT 1 UNION ALL 
      SELECT 1 UNION ALL SELECT 1 UNION ALL SELECT 1 UNION ALL 
      SELECT 1 UNION ALL SELECT 1 UNION ALL SELECT 1 UNION ALL SELECT 1 
     ),       --10E+1 or 10 rows 
     E2(N) AS (SELECT 1 FROM E1 a, E1 b), --10E+2 or 100 rows 
     E4(N) AS (SELECT 1 FROM E2 a, E2 b), --10E+4 or 10,000 rows max 
cteTally(N) AS (--==== This provides the "base" CTE and limits the number of rows right up front 
        -- for both a performance gain and prevention of accidental "overruns" 
      SELECT TOP (ISNULL(DATALENGTH(@pString),0)) ROW_NUMBER() 
                 OVER (ORDER BY (SELECT NULL)) FROM E4 
     ), 
cteStart(N1) AS (--==== This returns N+1 (starting position of each "element" just 
        -- once for each delimiter) 
      SELECT 1 UNION ALL 
      SELECT t.N+1 FROM cteTally t WHERE SUBSTRING(@pString,t.N,1) = @pDelimiter 
     ), 
cteLen(N1,L1) AS(--==== Return start and length (for use in substring) 
      SELECT s.N1, 
        ISNULL(NULLIF(CHARINDEX(@pDelimiter,@pString,s.N1),0)-s.N1,8000) 
      FROM cteStart s 
     ) 
--===== Do the actual split. The ISNULL/NULLIF combo handles the length for the final 
    -- element when no delimiter is found. 
SELECT ItemNumber = ROW_NUMBER() OVER(ORDER BY l.N1), 
     Item  = SUBSTRING(@pString, l.N1, l.L1) 
    FROM cteLen l 
; 
go 

到不同的邮政编码分成单独的条目。

然后，您可以简单地加入结果而不是动态创建IN条件。这也可能更高效。