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How to convert a column from string to number

3137754Dec 11 2015 — edited Dec 11 2015

Hi All,

I am new to oracle databases and i need to convert a field in my table called dummy_code which is stored in a string format to a number.

When i write the following SQL command i get an error "ORA-01722: invalid number"

select dummy_code from A

Where dummy_code = 12345

Any help is greatly appreciated.
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Locked on Jan 8 2016
Added on Dec 11 2015
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