Double quotes are used only for delimited identifiers. The DATE datatype holds only date information. Note that columns that have such datatypes are still stored as floating point if they are migrated from an earlier version. See the migration chapter in Getting Started for more information on migrating columns to INT64 exact numerics. InterBase now supports SQL delimited identifiers.
Delimited identifiers are database object names that are delimited by double quotes.
SQL delimited identifiers are permitted only in InterBase 6 clients and databases using dialect 3. In InterBase 6 clients and databases using dialect 3, a string constant is delimited by single quotes, and an SQL delimited identifier is delimited by double quotes. Because the quotes delimit the boundaries of the name, the possibilities for object names are greatly expanded from previous versions of InterBase. IBX accesses the InterBase API directly, allowing increased speed and control within InterBase applications. The version of IBX that comes with Delphi 5 addresses only InterBase 5 features.