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Define Join and Outer Join and differentiate between them.
Ans: Join - It generates all the combinations of tuples from two relations which satisfy a join condition. Outer Join - If there are any type of values in one table that do not have corresponding value(s) in the other, in an equi-join which will not be selected. Such rows can be forcefully selected through using the outer join. The corresponding columns for that row will comprise NULLs. There are in fact three forms of the outer-join operation: left outer join, right outer join and full outer join.
Evaluate, compare and contrast the two methods of relational database design namely top down method and Bottom up method. What will be your choice if you are asked to select a meth
DDL Compiler The DDL compiler changes the data definition statements (such as CREATE TABLE .... in SQL) into a set of tables having metadata tables. These tables have infor
The First Normal Form (1NF) Let us first describe 1NF: Definition: A relation (table) is in 1NF if 1. There are no duplicate tuples or rows in the relation. 2.
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The definition of the classes and operation can often be adjusted to increase the amount of inheritance". Justify the above statement. Adjustment of Inheritance The def
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