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What is storage manager?
A storage manager is a program module that gives the interface among the low level data keeps in a database and the application programs and queries submitted to the system.
Define Sequence A sequence is a set of integers 1, 2, 3 that are generated in order on demand. Sequences are regularly used in databases because lots of applications require ev
Ask q“A database will be made to store information about patients in a hospital. On arrival, each patient’s personal details (name, address, and telephone number) are recorded wher
How external/conceptual mapping and conceptual /internal mapping is performed
In a relational model how relations are termed? In a relational model, relations are termed as tables. (The term ‘relation’ is the technical name of the ‘table’ in RDBMS)
Explain Alternate key? Alternate Key - All the candidate keys except primary key are known as alternate keys.
What are the technique to define a schema completely ? A schema is completely define by DDL and DML query language.
why we fregment at all?
ddlc
What does the extract statement do in extract datasets? The data is written to virtual memory by extract commands.
Attributes having a one value for a particular entity. For instance, Age is a single valued attribute of a student entity. Attributes that have more than single values
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