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From: | C.R.Vegelin | Date: | December 6 2006 9:57am |

Subject: | SUM() of 1 and NULL is 1 ? | ||

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Hi List, I need to SUM() on months from a table like: CREATE TABLE `data` ( `Jan` float default NULL, ... ) ENGINE=MyISAM; # V 5.0.15 Months may have NULL values, like: INSERT INTO data (Jan) VALUES (1), (NULL); However, when I use SELECT SUM(Jan) AS Jan, the returned value is 1 in stead of NULL. How to get a result NULL when in such a case ? TIA, Cor

Thread | ||
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• SUM() of 1 and NULL is 1 ? | C.R.Vegelin | 6 Dec |

• RE: SUM() of 1 and NULL is 1 ? | Peter Lauri | 6 Dec |

• Re: SUM() of 1 and NULL is 1 ? | ViSolve DB Team | 6 Dec |

• Re: SUM() of 1 and NULL is 1 ? | ViSolve DB Team | 6 Dec |

• Re: SUM() of 1 and NULL is 1 ? | Remo Tex | 7 Dec |

• Re: SUM() of 1 and NULL is 1 ? | C.R.Vegelin | 6 Dec |

• Re: SUM() of 1 and NULL is 1 ? | Martijn Tonies | 6 Dec |

• Re: SUM() of 1 and NULL is 1 ? | Peter Brawley | 6 Dec |