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Query to delete some characters from a column

or how to remove parts of a string

1:33 pm on Nov 15, 2011 (gmt 0)

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I search for an answer but couldnīt find one that work.

I have a column on a table with thousands of lines with values like:

... and so on

And I need to delete everything after -v16-, including the "-v16-".

Is it possible to do that in phpMyAdmin?
1:59 pm on Nov 15, 2011 (gmt 0)

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see documentation for substring_index function

select substring_index(your_field,'-',2)
from your_table

update your_table set your_field=substring_index(your_field,'-',2)