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What is SQL, and why is it important?
SQL stands for Structured Query Language, and is the most significant data processing language in use today. It is not a complete programming language like Java or C#, but a data sublanguage used for creating and processing database data and metadata.
All DBMS products today use SQL.
Difference between Operating System and Database Security Security within the operating system can be executed at various levels ranging from passwords for access to system, t
How can Redundant Associations be done It can be done by asking questions: i) Is there a specific arrangement of network which would optimize critical aspects of completed
Find the names of all Albums that have more than 30 tracks. Result: (name: varchar(255))
What is the difference between link and reference? The fundamental difference between links and references is that links are symmetrical on the other hand references refer only
, write the relational schema, and draw the new dependency diagrams. Identify the normal forms for each table structure you created
Question (a) Concurrent access to data from a database is a normal part of application program usage. Describe three approaches to concurrency control (b) Distinguish among
What are attributes? Give examples. An entity is shown by a set of attributes. Attributes are descriptive properties possessed by every member of an entity set. Example: pos
Consider the following relational schema: Doctor(DName,Reg_no) Patient(Pname, Disease) Assigned_To (Pname,Dname) Give expression in both Tuple calculus and Domain calculus for
What subschema expresses ? A subschema expresses the external view. (External schemas are called also called as subschemas)
Write short notes on extension and intension? In any data model, it is significant to distinguish among the description of the database and the database itself the description
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