SDDB  Database object

   D=SDDB(DBNAME)

 INPUT
   DBNAME   database filename

 OUTPUT
   D        database index

 DESCRIPTION
 SDDB opens an existing SQLite database DBNAME. If the DBNAME file does
 not exist, an empty database is created.
 SDSQL object can be used to perform operations on the dataset or create
 queries.

 SEE ALSO
 SDSQL