how to do minus in mysql

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Published on 2010-05-11T05:29:21Z Indexed on 2010/05/11 5:34 UTC
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mysql

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c#

in mysql i want to do (-) minus. how i can do it.

i do it by update var set var = var-1; but when i do it then i get a biggest value of int in my table.

are any sollution you know about it.

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