#RDBMS__relational_database_management_system  a database management system designed to manage a relational database
  supertype:  DBMS__database_management_system  a software system that facilitates the creation and maintenance and use of an electronic database
  part:  relational_database  a database in which relations between information items are explicitly specified as accessible attributes; "in a relational database the data are organized as a number of differently sized tables"

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