What are the pros and cons of using a hash index instead of a B-tree index in a database?

Franck Dernoncourt @Franck-Dernoncourt

17 March 2013 1 3K Report

Joachim Pimiskern

With hash indexes you can only do the equi-join:

select * from A,B where A.C = B.D

but not

select * from A, B where A.C >= 0.95 * B.D and A.C

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