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query help

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sqlnaive
sqlnaive
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Group: General Forum Members
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In a table, I have value like this:

1A
2A

I want data like this:
1C
1D
2C
2D


that is for each value of A in table, i want two records with C and D.
mister.magoo
mister.magoo
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Group: General Forum Members
Points: 4146 Visits: 7865
sqlnaive (1/17/2013)
In a table, I have value like this:

1A
2A

I want data like this:
1C
1D
2C
2D


that is for each value of A in table, i want two records with C and D.



SELECT newColumn
FROM yourTable as yt
CROSS APPLY (
SELECT LEFT(yt.yourColumn,1)+'C'
UNION ALL
SELECT LEFT(yt.yourColumn,1)+'D'
) AS new(newColumn)



Without table definitions and sample data, this is just a sample showing how CROSS APPLY can be used to expand 1 row to many...

MM


select geometry::STGeomFromWKB(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  • sqlnaive
    sqlnaive
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    Cool. Thanks. I was trying this by creating temp table and then making CROSS JOIN. But definitely it's better. :-)
    dwain.c
    dwain.c
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    This should also work:


    SELECT newColumn
    FROM yourTable as yt
    CROSS APPLY (
    VALUES (LEFT(yt.yourColumn,1)+'C')
    ,(LEFT(yt.yourColumn,1)+'D') new (newColumn)





    My mantra: No loops! No CURSORs! No RBAR! Hoo-uh!

    My thought question: Have you ever been told that your query runs too fast?

    My advice:
    INDEXing a poor-performing query is like putting sugar on cat food. Yeah, it probably tastes better but are you sure you want to eat it?
    The path of least resistance can be a slippery slope. Take care that fixing your fixes of fixes doesn't snowball and end up costing you more than fixing the root cause would have in the first place.


    Need to UNPIVOT? Why not CROSS APPLY VALUES instead?
    Since random numbers are too important to be left to chance, let's generate some!
    Learn to understand recursive CTEs by example.
    Splitting strings based on patterns can be fast!
    My temporal SQL musings: Calendar Tables, an Easter SQL, Time Slots and Self-maintaining, Contiguous Effective Dates in Temporal Tables
    Go


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