About Sort Order

When you sort collections, you must understand these concepts:

  • Some fields that appear to be numeric (for example, Account) might actually be character-based and would use text-character sort order.
  • Character-based fields use text-character sorting. For example, if you attempt an ascending sort by account number, the accounts might be sorted like this:

    (blank field)

    #222

    222

    2220

    @201

    XL-64

    xl-64

    In text-character (ascending) order, these rules exist:

    • Character strings are generally sorted from left to right. That is, the first character (furthest left) is evaluated, then the second, and so on.
    • A blank field comes before any other character. Thus, any blank fields always display first.
    • Special characters might come before numerals, between numerals and letters, or after letters. Thus, #222 comes before 222, but @201 comes after 222.
    • Numerals display in correct numeric order, regardless of size.
    • Numerals display before alphabetic characters.
    • Upper-case characters display before lower-case characters. Thus, XL-64 comes before xl-64.
  • Unicode strings typically are compared using a "word sort" technique, where all punctuation marks and other non-alphanumeric characters, except for the hyphen and the apostrophe, come before any alphanumeric character. The hyphen and the apostrophe are treated differently than the other non-alphanumeric symbols, in order to ensure that words such as coop and co-op stay together within a sorted list.
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