| Feature | ANSI Driver | Unicode Driver | |---------|-------------|----------------| | | Uses system ANSI code page (e.g., Windows-1252) | Uses UTF-16 (Windows native Unicode) | | International chars | Poor support (corruption risk) | Full support for all languages | | Modern apps | Not recommended | Recommended | | Legacy apps | Some very old (pre-2000) apps need ANSI | Most apps since Windows 2000 work with Unicode |
A: 1 GB (PostgreSQL limit), but ODBC may truncate at 255 unless you set "Long Varchar compatibility".
A: Yes, if PostgreSQL server is configured for SSPI (Kerberos/NTLM). Use SSPI=1 in connection string.
Always install the Unicode driver unless you have an ancient application that explicitly requires ANSI.