'Result relation' presentation slideshows

Query-by-Example (QBE)

502 views • 34 slides

Query-by-Example (QBE)

412 views • 34 slides

Relational Algebra

Relational Algebra. Relational Query Languages. Query languages: allow manipulation and retrieval of data from a database Relational model supports simple, powerful QLs: Strong formal foundation Allows for much optimization Query languages are NOT programming languages

286 views • 28 slides

Relational Algebra

Relational Algebra. Relational Query Languages. Query languages : Allow manipulation and retrieval of data from a database. Relational model supports simple, powerful QLs: Strong formal foundation based on logic. Allows for much optimization. Query Languages != programming languages!

354 views • 21 slides

Some High Level Language Constructs for Data of Type Relation

Some High Level Language Constructs for Data of Type Relation. By Joachim W. Schmidt Hamburg University, ACM Trans. on Database Systems, 77. Language Data Types. TYPE employeeRecord = record employeeNumber, employeeStatus: integer , employeeName: string ; end ;

296 views • 19 slides

Some High Level Language Constructs for Data of Type Relation

Some High Level Language Constructs for Data of Type Relation. By Joachim W. Schmidt Hamburg University, ACM Trans. on Database Systems, 77. Language Data Types. TYPE employeeRecord = record employeeNumber, employeeStatus: integer , employeeName: string ; end ;

193 views • 19 slides