ISO_1 is provided for compatibility with the Adaptive Server Enterprise default ISO_1 collation. The differences are as follows:
The lower case letter sharp s (\xDF) sorts with the lower case s in Sybase IQ and Adaptive Server Anywhere, but after ss in Adaptive Server Enterprise.
The ligatures corresponding to AE and ae (\xC6 and \xE6) sort after A and a respectively in Sybase IQ and Adaptive Server Anywhere, but after AE and ae in Adaptive Server Enterprise.
This collation includes the euro currency symbol and several other characters (Z-with-caron and z-with-caron). For single-byte Windows operating systems, this is the recommended collation in most cases. This collation is recommended for Windows users using English or Western European languages.
Windows NT service patch 4 changes the default character set in many locales to a new 1252 character set on which 1252LATIN1 is based. If you have this service patch, you should use this collation.
The euro symbol sorts with the other currency symbols.
This collation is the same as ISO_1, but with sorting for values in the range A0-BF. For compatibility with Adaptive Server Enterprise, the ISO_1 collation has no characters for 0xA0-0xBF. However the ISO Latin 1 character set on which it is based does have characters in these positions. The ISO1LATIN1 collation reflects the characters in these positions.
If you are not concerned with Adaptive Server Enterprise compatibility, ISO1LATIN1 is generally recommended instead of ISO_1.
ISO1LATIN1 is recommended for UNIX users using English or Western European languages, if you are willing to sacrifice some of the optimal performance of the default collation, ISO_BINENG.
This collation is the same as ISO1LATIN1, but includes the euro currency symbol and the other new characters included in the 1252 LATIN1 collation.
If your machine uses the ISO Latin 9 character set, and you are willing to sacrifice some of the optimal performance of ISO_BINENG, then you should use this collation.
