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Aggregate Functions

Aggregate Functions: Oracle has many built-in functions which are used to process numbers or strings. They are very useful as we can directly use them , we just have to write the aggregate function name and in braces the column name on which w...

Having Clause

Having Clause: The Having clause is used to filter the group result. As we cannot use Where to filter the Group By clause results so Having provide the same functionality as Where. It filter the result fetched by Group By clause. It comes a...

Crreating Virtual Table using CREATE VIEW statement

CREATING VIEWS: Views are virtual tables which are created from other tables .It is beneficial for those situation when we want to show limited columns to users. It can be created from one or more tables. Syntax: CREATE VIEW viewname AS ...
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