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Select dynamic rows as columns?

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Last Modified: 2016-08-03
Hi,

I have a CTE that selects two sets of data. One called Months that will return back the last year worth of months, for example:

2015-07
2015-08
2015-09
2015-10
2015-11
2015-12
2016-01
2016-02
2016-03
2016-04
2016-05
2016-06
2016-07

Another, contains the core data that returns data in the below column format:

ClientID      MonthPeriod      Spending
0001            2015-7                 120.11
0001            2015-9                 190.34
0001            2015-10               100.10
0001            2016-2                 140.05

How do i query the above to so that it returns in the following format dynamically:

ClientID      2015-7      2015-8      2015-9      2015-10      2015-11      2015-12      2016-01      2016-02
0001           120.11       0.00          190.34       100.10         0.00            0.00             0.00             140.05
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