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Whst is logical schema ?
Logical schema is the entire database.
What is the aim of object design The aim of object design is to identify object which the system contains and the interactions among them. The system implements specification
Why older data models are being replaced by new data modelling 100 words accepted#
A database is a set of data. But, is the data kept in a database trustworthy? To answer that query we must first answer the question. What is integrity? Integrity simply means t
Section A: Use the following tables to create a database called College. Use SQL commands. Student stuid(primary) lastName firstName
in an organization several projects are undertaken. Each project can employ one or more employees. Each employee can work on one or more projects. Each project is undertaken on the
Ancestry database records information about family trees . Following information is recorded about each person: FIRSTNAME first name SURNAME surname MNAME maiden name (if
Explain group By clause in SQL? Group By clause in SQL: The GROUP BY clause can be used in a SELECT statement to collect data across multiple records and group the results thro
Describe the four main ways of optimising disk block access. Ans: a. Disk b. Non-volatile writes buffers c. File organization (Clustering) d. Log-based file system
compare the features of oracle RDBMS with MySQL and Microsoft SQL server
what is data link layer
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