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Define the Third Normal Form:
The third normal form (3NF) is a normal form employed in database normalization. 3NF was initially defined by E.F. Codd in 1971. Codd's definition defines that a table is in 3NF if and just only if both of the following conditions hold: The relation R (table) is in second normal form (2NF)
Each non-prime attribute of R is non-transitively dependent ( that is directly dependent) on each key of R.
The Maximum no of key fields that can be used in a header is?? 50
Describe multi key files
diagrams and meaning
Explain Instance and schemas? Instances and schemas: Databases changes over time as the information is deleted and inserted. The collection of information stored in database
You are required to implement integrity constraints within the database to enforce the following requirements: For Projects: Start date must be supplied. Start date cannot be i
Load sample data into the database tables design and test queries to return the following information • All rows and columns for employees • All rows and columns for customers •
What is meant by the degree of relationship set? The degree of relationship type is the number of participating entity types.
When a function module is activated syntax checking is performed automatically. YEs, a function module is activated syntax checking.
What is the used of specifying alias? Specifying alias: is used to rename column or attribute in a table.
explain ANSI SPARC architecture
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