sql - Avoiding Multiple Joins -


i have table (manufacturers):

manufacturer    id ------------------ lagun            1 hurco            2 mazak            3 haas             4

then table (inventory):

shop     lathe    drillpress    cnc    mill    id ------------------------------------------------- abc inc    2          1           3      3       1 veco       4          2           1      2       2

i need end with:

shop     lathe    drillpress   cnc     mill --------------------------------------------   abc inc  hurco    lagun        mazak   mazak veco     haas     hurco        lagun   hurco

i have this:

select       shop, m1.manufacturer lathe, m2.manufacturer drillpress,       m3.manufacturer cnc, m4.manufacturer mill  inventory left join manufacturers m1 on m1.id = i.lstflowman left join manufacturers m2 on m2.id = i.lstfiltflowman left join manufacturers m3 on m3.id = i.lstfilterman left join manufacturers m4 on m4.id = i.lstemitman

i'm missing better way pivot or cross apply or something.

thanks @laudec, here sqlserver version:

select * ( select shop, keys, manufacturer (select shop, lathe,drillpress,cnc,mill inventory)     unpivot (val keys in (lathe,drillpress,cnc,mill)) unpvt      join manufacturers m on m.id=val ) pivot ( max(manufacturer) keys in (lathe,drillpress,cnc,mill) ) pp

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