SPSS - Quantiles and Quartiles

Instructional video on determining Quantiles (incl. quartiles, quintiles, deciles, percentiles) with SPSS.

[robeik]

You can use Visual Binning as well, and choose the number of cut points, which can then generate a new variable with bin numbers. However, not 100% certain about it, but the numbers that end up the bins are not exactly 20% (in my case I was after quintiles).