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haden213
Starting Member
3 Posts |
 Posted - 2009-09-26 : 05:10:23
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| I have a table with some values as show belowENTRYID | CLIENTID | ENTRYNUMBER | MESSAGE------------------------------------------- 1 | 222 | 1 |'ffdfdf' 2 | 222 | 2 |'dsds' 3 | 222 | 3 | 'dfdfd 4 | 333 | 1 | 'sdsd' 5 | 444 | 2 | 'sdsd'When i insert a new row I need to generate a new ID which will be the 'MAX(ENTRYID) + 1' and the entry number would 'MAX(ENTRYNUMBER)+1 WHERE CLIENTID = <<given client id>>' This table doesn't have any primary key or autoincrement values.I would greatly appreciate it if someone would help we in getting this done with one single query... |
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webfred
Master Smack Fu Yak Hacker
8781 Posts |
Posted - 2009-09-26 : 05:47:11
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That's absolut dangerous if more than one insert at a time happens...
No, you're never too old to Yak'n'Roll if you're too young to die. |
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visakh16
Very Important crosS Applying yaK Herder
52326 Posts |
Posted - 2009-09-29 : 00:29:21
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| if its sql 2005 or greater use ROW_NUMBER function for this. somethinglike:-SELECT ROW_NUMBER() OVER (PARTITION BY CLIENTID ORDER BY ENTRYID) AS ENTRYNUMBER,...and make ENTRYID as an identity column |
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Help with select and insert