The provider usually
specifies the delimiting character. However, when there is a difference
between what the provider and the DBMS allow for this character, the
QUOTE_CHAR= option overrides the character that the provider returns.
Microsoft
SQL Server: QUOTE_CHAR= overrides the Microsoft
SQL Server default.
ODBC: This
option is mainly for the ODBC interface to Sybase, and you should
use it with the DBCONINIT and DBLIBINIT LIBNAME options. QUOTE_CHAR=
overrides the ODBC default because some drivers return a blank for
the identifier delimiter even though the DBMS uses a quotation mark
(for example, ODBC to Sybase).