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write a short note on participation role?
Participation role: roles are indicating in E-R diagram by labelling the lines that connect diamonds to rectangles.
What are the time stamps associated with each data item? W-timestamp (Q) denotes the largest time stamp if any transaction that implemented WRITE (Q) successfully. R-timesta
What do you mean through integrity constraints? Integrity Constraints -An integrity constraint is a condition specified on a database schema and restricts the data in which
how to write tables and drow E-R diagrams for hosiptal management system and how to normalize and cardinalities?
Improved performance: As the data is located near the site of its demand, and given the inherent parallelism because of multiple copies, speed of database access may be good for di
Assume that you are responsible for selecting a new DBMS product for Sohar Hospital
The database is to record information about artists for a (music) production company. An artist is the name of a singer or band; the name of the artist, the year the artist started
Which data type can store unstructured data? Raw data type can store unstructured data.
Define the terms 1) physical schema 2) logical schema. Physical schema: The physical schema explains the database design at the physical level, which is the lowest level of abs
List any two significant differences between a file processing system and a DBMS. File Processing System vs. DBMS Data Independence - Data independence is the capacity t
A database administrator''s responsibilities and data contents
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