Search:

Type: Posts; User: Twey; Keyword(s):

Search: Search took 0.05 seconds.

  1. Replies
    17
    Views
    35,103

    PHP and SQL are entirely different languages. ...

    PHP and SQL are entirely different languages. Their definitions are not linked in any way.
  2. Replies
    17
    Views
    35,103

    For example, an optional integer field. No...

    For example, an optional integer field. No integer value can be used to indicate a lack of a value, because that integer could potentially be a value in itself, including zero. A value is required...
  3. Replies
    17
    Views
    35,103

    Yes, when you wish to have a value that...

    Yes, when you wish to have a value that represents a lack of a value: for example, when you need to distinguish between an empty string or zero and an actual lack of a value. In relationships, as...
  4. Replies
    17
    Views
    35,103

    As well as all possible values of a column type,...

    As well as all possible values of a column type, including values such as zero or an empty string (sometimes confusingly referred to as a 'null string' for C reasons) there is also an additional...
Results 1 to 4 of 4