The subject matter of this volume is wholly Firebird's implementation of the SQL
relational database language. Firebird conforms closely with international standards for SQL, from
data type support, data storage structures, referential integrity mechanisms, to
data manipulation capabilities and access privileges. Firebird also implements a robust
procedural language—procedural SQL (PSQL)— for stored procedures, triggers and
dynamically-executable code blocks. These are the areas addressed in this volume.