What do you understand by the term SQL
What understand by the term SQL, and give its importance?
Expert
The abbreviation of SQL is Structured Query Language and is the most important data processing language employing nowadays. It is not a complete programming language such as Java or C++, however a data sublanguage employed for creating and processing database data and metadata. All DBMS products nowadays employ in SQL.
When is a functional dependency F considers as to be minimal?
Describe the term Derivations, Stage Variables and Constants?
Explain the term Repository Tables within the Data Stage?
What is a derived (artificial) primary key? When must this be used?
Describes the main data structures used in following areas: RDBMS, Network data model and Hierarchical data model?
Describe the term HOLAP.
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Briefly describe the employ of aggregate tables and lookup tables?
What do you understand by the term ACID transaction in DBMS? Describe briefly?
Clarify briefly why dimension tables is de-normalized in the nature?
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