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What is an object ID? Each class-derived table has an ID for primary key, one or more object IDs form primary key for association derived tables. An object ID is equivalent dat
what is query processing ,query optimization and performance turring?
2NF Normal Form : A relation schema process R is in 2NF if it is in 1NF and each non-prime attribute A in R is fully functionally related on primary key. Second normal form (2N
Explain the term High level DML? High level DML A high-level or non-procedural DML permit the user to specify what data is needed without specifying how it is to be acquired.
Explain the conventions (relationships) for displaying an ER schema as an ER diagram.
Consider a research paper submission process. The process starts when an author submits a draft research paper (the paper may have up to 3 authors) to the chair of the organizing c
Represent the following scenarios with E-R diagrams drawn using the ER Assistant software. The diagrams should indicate cardinality and optionality of relationships. Transform each
How many levels can be viewed in Architecture of the database ? Architecture of the database can be viewed as three levels.
To delete a particular column in a relation which command is used ? To delete a particular column in a relation ALTER command is used.
what is definition hierarchical data model
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