[snip]
Does anyone know the easiest way to copy a column in mysql?

I have a table (table1) which has 4 columns, I want to copy all the contents
of col1 into col2. 
Col3 is the primary unique key, so the copy has to keep the data matched
with col3.
[/snip] 

UPDATE table1 SET col2=col1;

---
Tom Crimmins
Interface Specialist
Pottawattamie County, Iowa

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