4

I'm trying to do something like:

INSERT INTO stories 
   (vid, ip, body, timestamp) 
VALUES (
   (SELECT vid+1 FROM stories ORDER BY vid DESC LIMIT 1), 
   INET_ATON('127.0.0.1'), 
   'test', 
   NOW()
)

but I'm having a problem figuring out how to nest a SELECT statement's returned data into an INSERT statement. I need to figure out how to get the highest existing vid and increment it by 1.

Any ideas?

6

use an explicit SELECT, not nested

INSERT INTO stories 
   (vid, ip, body, timestamp) 
SELECT
   COALESCE(MAX(vid),0)+1,    --max always returns one row if no group by
   INET_ATON('127.0.0.1'), 
   'test', 
   NOW()
FROM stories
ORDER BY vid DESC LIMIT 1
  • that's a great solution! thank you. one more thing though - how do I return an integer 1 for vid value if table stories is empty? – donk Mar 20 '11 at 19:41
  • @Donkapone ~ That sounds like "I have two different business cases, I should test for one of them to be valid, and then execute one of two different paths depending on that test result" doesn't it? How would you solve it? – jcolebrand Mar 21 '11 at 19:34

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