SQL Server 2008：结合两个复杂的查询

Question

这是一个仅返回1列（称为数据路径）的查询：

SELECT  --assumes number not at end of string
    LEFT(startOf, PATINDEX('%[^0-9]%', startof)-1)
FROM
    (
    SELECT  --assumed 3 digits minimum
        SUBSTRING(datapath, PATINDEX('%[0-9][0-9][0-9]%', datapath), 8000) AS startOf
    FROM
       (select datapath from batchinfo where LEN(datapath)>3) as bar
    ) foo

在下面这个选择语句中的另一句话，而不是选择数据路径，我想运行上面的sql语句

SELECT reporttime,
                    datapath,
                    finalconc, 
                    instrument 
                    FROM batchinfo  
                    JOIN qvalues ON batchinfo.rowid = qvalues.rowid
                    WHERE compound = 3 AND name = "hey"
                   AND batchinfo.instrument = 44 
                   AND batchinfo.reporttime LIKE '10/%/2010%'";

Answer 1

SELECT reporttime,
                    datapath,
                    finalconc, 
                    instrument 
      FROM

(
SELECT  --assumes number not at end of string
    LEFT(startOf, PATINDEX('%[^0-9]%', startof)-1) AS datapath, --correct?
    rowid, instrument , reporttime 
FROM
    (
    SELECT  --assumed 3 digits minimum
        SUBSTRING(datapath, PATINDEX('%[0-9][0-9][0-9]%', datapath), 8000) AS startOf,
        rowid, instrument , reporttime
    FROM
       batchinfo --don't need LEN check. PATINDEX will do that implicitly
    ) foo

) batchinfo  
                    JOIN qvalues ON batchinfo.rowid = qvalues.rowid
                    WHERE compound = 3 AND name = "hey"
                   AND batchinfo.instrument = 44 
                   AND batchinfo.reporttime LIKE '10/%/2010%'";

Answer 2

如果我没看错，我认为您应该可以将第二个选择中的“数据路径”列分配给您在第一个选择中选择的值，并将“ startOf”替换为您为startOf选择的值。

我认为应该是这样的：

SELECT 
  reporttime, 
  'datapath' = LEFT(SUBSTRING(datapath, PATINDEX('%[0-9][0-9][0-9]%', datapath), 8000), PATINDEX('%[^0-9]%', SUBSTRING(datapath, PATINDEX('%[0-9][0-9][0-9]%', datapath), 8000))-1) , 
  finalconc,  
  instrument  
FROM batchinfo   
JOIN qvalues ON batchinfo.rowid = qvalues.rowid 
WHERE compound = 3 AND name = "hey" 
AND batchinfo.instrument = 44  
AND batchinfo.reporttime LIKE '10/%/2010%'";