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1. Based on the dependency diagram, create a database whose tables are in at least 2NF, showing the dependency diagram for each table (as shown in class). Label the types of dependencies (partial, transitive).
b) Create the logical database schema. Identify all primary keys.
With the help of an example display how records can be deleted and updated in QBE. (i) Increase Pay_Rate of employees along with the skill of ‘cook' by 10%. (ii) Delete employee
What is nested relational model? The nested relational model is an extension of relational model in which domains might be either atomic or relation valued.
What is RDBMS? Relational Data Base Management Systems (RDBMS) are database management systems that maintain data records and indices in tables. Relationships may be formed and
Which is a legal expression in SQL? SELECT NAME FROM EMPLOYEE is a legal expression in SQL.
What are the ways in which the variable-length records arise in database systems? Storage of many record types in a file. Record types that permit variable lengths for one o
discuss the array implementation of a stack.
Most computer systems authenticate users by asking them for the user name and password. However, the user names and passwords often can be guessed by hackers. Suggest an automated,
Give an example of operations from the State Actions and Activities. For instance, in bank the activity verify account code and verify password
Operator Precedence The basic operators used in SQL are * / - + Operators of the similar priority are evaluated From Left to right Parentheses are used to force priorit
What are the disadvantages of relational data ? Disadvantages • Performance - If the number of tables among that relationships to be established are large and the tables t
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