DSQL is a scripting language for SQL, aka Perl for JDBC. It allows rapid development of code to perform database programming, data warehousing and import/export from databases, XML, Excel, etc.

dSQL is an SQL query tool for MySQL, Oracle, Postgres, MS- SQL, ODBC drivers, and all supported Perl DBI drivers. It uses Glade and GTK-Perl.

Dynamic SQL. When you read in the new documentation "available in DSQL", it means the instruction is available to programs that submit SQL statements created in run time to the server, with or without parameters. It's the way a typical application made in Delphi or BCB works.