Answer / vimal

VIEWS
View is a virtual table
If we want to access specific column from specific table we
can go for views
JOINS
Sometimes we have to select data from two or more tables to
make our result complete we have to perform join

Answer / mohsin mohammed abdul

basically we use joins to query a sql with 1 or more tables.
1) self join.. join within the same table using aliases
2) equi join.. join between the 2 tables with commom columns
3) outer join.. and it is divided into 2 catagories left
outer join and right outer join.

View :- its a logical representation of one or more tables.
View doesn't have the data of its own. But still you can
perform DML on a view ..the changes will be done in the
underlying base tables..

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