mysql subquery (query for function parameter)

Not sure if this is ok to combine so many things...

If I have a table with columns:
firstname
lastname

the name "experts exchange" in firstname.

I want to search for the space, and put everything after into `lastname`. ie(firstname:experts  lastname:exchange)

Logically, this is what I would want.
update table set `lastname` = substr(`firstname`, (SELECT instr(`firstname`, ' ') FROM table));

(even that though would include the space, so I would want instr + 1. Or I could do a second pass to remove the leading space afterwards....

Thanks in advance!
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ststestingAsked:
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Cornelia YoderArtistCommented:
You could use SUBSTRING_INDEX(lastname, " ", -1) to find the last space.

So then you would select  SUBSTRING(lastname, SUBSTRING_INDEX(lastname," ",-1)+1) to get everything following the last space.

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SharathData EngineerCommented:
You can try this.
Update test
Set lastname = trim(substring_index(firstname,' ',-1));

Open in new window


http://sqlfiddle.com/#!9/785c3/1
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