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Describe Application programming interface?
Application Programming Interface - Commercial SQL implementations take one of the two primary techniques for involving SQL in a programming language - embedded SQL and application program interface (API). In the application program interface approach, the program communicates along with the RDBMS using a set of functions known as the Application Program Interface (API). The program passes the SQL statements to the RDBMS using API calls and uses API calls to retrieve the results. In these techniques, the precompiler is not needed.
WHY SHOULD NULL IN A RELATION BE AVOID AS possible?
What is NULL? Simply NULL means not in value.
Benefits and Limitations od Data Models?
Question 1 What are the advantages of DBMS approach in managing data? Question 2 What are the services provided by a database system Question 3 List and briefly describe
What is Relational Algebra? Relational algebra is a Procedural query Language?
a project based on normalization with first, second and third normalization. There need to be a diagram also
Describe an data dictionary? A data dictionary is a data structure which keeps meta data about the structure of the database ie. the schema of the database.
Example - ALTER TABLE emp MODIFY (empno NUMBER (7));
What are the two approaches to store relations in distributed database? a) Replication b) Fragmentation
Describe entity referential integrity and integrity. Give an example of each. Entity Integrity Rule - If there is a attribute A of relation R is a prime attribute of R then A
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