Random sampling - new programmer

[Amoryn]

hi

I am new to sas but need to do the following:

my data (this is just dummy data, the full set contains 25 million obs)

phone number	HV Customer	Region	Age	Port in	pmt method	spend bucket
0832122256	High Value	Gauteng	25	yes	Prepaid	R120 to R155
0833132424	Low Value	Gauteng	26	yes	postpaid	R0 to R50
0834532675	Very high Value	KZN	12	yes	postpaid	R180 to R230
0854217863	Mid Value	Limpopo	20	no	prepaid	R260 to R300

Create a random sample which consists of the following:

1. 100 people should reflect a prepaid pmt method
2. 25 people should be high or very high value customers (should be split between prepaid and postpaid pmt method)
3. the region should comprise of 40% gauteng and the rest shoul be equally divided
4. the age should be 26 and older
5. 30 of the people should have ported in (yes)
6. spend should be above R120

any idea as to how to go about tackling this problem

[Keith]

That's very specific criteria, so you may have to use more than one method.  I would suggest reading up on PROC SURVEYSELECT which is used for extracting samples.  You can create a dataset that contains the relevant variable names and how many of each should be returned. this is then referenced in the SAMPSIZE= option in PROC SURVEYSELECT.  There are many other options you can specify to control the output.

Hope this points you in the right direction.