LDI is the capacity to change the conceptual schema without having to change external schemas or application programs.
BackTracking is used for solving N-Queens problem
Data Control Language takes caare of security and authorization
SQL is a domain-specific language used in programming and designed for managing data held in a relational database management system, or for stream processing in a relational data stream management system.
Purpose of SQL are ::
* To define the data structures
* To specify the syntax and semantics of SQL manipulation language
* To specify the syntax and semantics of SQL data definition language
Polish and Reverse Polish are the notations used in Evaluation of Arithmetic Expressions using prefix and postfix forms
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