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Write short notes on relational constraints?
Relational Constraints are:1. NOT NULL2. Unique3. Primary key4. Foreign key5. Table check
Explain the conventions (relationships) for displaying an ER schema as an ER diagram.
After the completion of the logical model the physical model is to be made. The oracle 10 G will be used as a database server and all the tables with their column are created and i
The Enhanced Entity Relationship Diagram (ERD) produced with a drawing or case tool. Your EERD must use a ''standard'' notation style such as Crows Foot or Chen. Please note that t
A database administrator''s responsibilities and data contents
What are the comparison operator in SQL? Comparison operator in SQL are =, LIKE and BETWEEN
The Maximum no of key fields that can be used in a header is?? 50
Define physical image of a global relation at a site
UNION If R1 and R2 are two union compatible relations then R3 = R1 ∪ R2 is the relation having tuples that are either in R1 or in R2 or in both. In case, R3 will have tuples
FDs in Entities : Student entity : Enrolment number → Student name, Address Course Entity :
What is B-Tree? A B-tree eliminates the redundant storage of search-key values .It permits search key values to appear only once.
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