List:General Discussion« Previous MessageNext Message »
From:Paul DuBois Date:May 10 2002 9:59pm
Subject:Re: quick sql question
View as plain text  
At 17:54 -0400 5/10/02, Augey Mikus wrote:
>what i meant is deleting duplicate occurences of records of a 
>certain field. ...sorry...

Ah.

One thing you can do is add a unique index on that field with
ALTER IGNORE TABLE tbl_name ADD UNIQUE (col_name)
or
ALTER IGNORE TABLE tbl_name ADD PRIMARY KEY (col_name)

and MySQL will clobber duplicate records as it builds the index.

>
>
>Paul DuBois wrote:
>
>>At 17:16 -0400 5/10/02, Augey Mikus wrote:
>>
>>>what is the simplest way to delete duplicate occurences of a 
>>>specific field in mysql?
>>>
>>>thanks,
>>>
>>>augey
>>
>>
>>Your question is a bit ambiguous.  You could do this by using ALTER
>>TABLE to remove the column itself from the table, for example, but
>>I'm guessing maybe that's not what you mean.

Thread
quick sql questionAugey Mikus10 May
  • Re: quick sql questionPaul DuBois10 May
  • Re: quick sql questionAugey Mikus10 May
    • Re: quick sql questionPaul DuBois10 May
  • Re: quick sql questionAugey Mikus10 May
    • Re: quick sql questionPaul DuBois10 May
  • Re: quick sql questionAugey Mikus11 May
  • Re: quick sql questionAugey Mikus11 May
    • Re: quick sql questionPaul DuBois11 May
      • Repair with key cachesup-mysql11 May
        • Re: Repair with key cacheBenjamin Pflugmann11 May
          • Re: Repair with key cachesup-mysql11 May
            • Re: Repair with key cachePaul DuBois12 May
              • Re: Repair with key cachesup-mysql12 May
              • Re: Repair with key cachesup-mysql12 May
                • Re: Repair with key cachePaul DuBois12 May
                  • Re: Repair with key cachesup-mysql12 May
                    • Re: Repair with key cacheJeremy Zawodny12 May
                      • RE: Repair with key cacheRamon Arias13 May
                        • Re: Repair with key cacheJeremy Zawodny13 May
  • Re: quick sql questionAugey Mikus11 May