At 9:47 +0000 1/20/03, Sean Burlington wrote:
>Daevid Vincent wrote:
>>This may be useful to you:
>>http://www.mysql.com/doc/en/REPLACE.html
>>
>
>replace works very nicley and is IMO a good extension to standard SQL
>
>another way that may be suitable is to delete first and then insert
>(this may erase data if you are not inserting all columns)
If you're not inserting all columns, so will REPLACE!
>
>
>
>>>-----Original Message-----
>>>From: Zysman, Roiy [mailto:roiy.zysman@stripped] Sent: Sunday,
>>>January 19, 2003 11:16 PM
>>>To: mysql@stripped
>>>Subject: What is the best known practice for insertion...?
>>>
>>>
>>>Hi All,
>>>I'm trying to insert multiple lines to a table with 3 col. All 3 of them
>>>are a part of the primary key.
>>>But while inserting the data , sometime occurs the situation where I
>>>want to insert an already exist entry with the same keys. And mysql
>>>barfs out that this key already exist in the table.
>>>The solution to it would be probably to query for each entry that I'm
>>>about to insert if that entry exists , but it looks like it would be an
>>>enormous overhead. I'm asking this question on a _performance_ context .
>>>What is the best way , ignore the error messages mysql barfs out or
>>>query each entry for existences before inserting it ?
