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while loop help!

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right i have a mysql query which 'selects all fields from 'features' order by 'id' desc'

that works fine and everything and i have a while loop which keepes looping and gets all data and echos it.

how would i go about getting and disaplying only 3 sets of data as opposided to all the data?

so instead of ID1, ID2, ID3.......ID44, ID45. i jsut print out the last 3, i.e ID43, ID44, ID45.

would i need to do a different loop?

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