MYSQL how to sum rows with same key, then delete the duplicate rows

Posted by Bhante-S on Stack Overflow See other posts from Stack Overflow or by Bhante-S
Published on 2013-06-30T04:05:41Z Indexed on 2013/06/30 4:21 UTC
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mysql

|

sum

What I have:
key data
1 22
1 5
2 6
3 1
3 -3

What I want:
key data
1 27
2 6
3 -2

I don’t mind doing this with two or more queries, esp. if they are simple--makes for easier maintenance. Also the tables are fairly small (<2,000 records). The ‘key’ field is indexed and allows duplicates.

Muchas Gracias

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