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Constraints

NOT NULL CONSTRAINT -    Ensures that a column cannot have a null value. DEFAULT CONSTRAINT -    Provides a default value for a column when none is specified  UNIQUE CONSTRAINT -   Ensures that all values in columns are different  CHECK CONSTRAINT -   Makes sure that all values in a column satisfy certain criteria  PRIMARY KEY CONSTRAINT -   Used to uniquely identify a row in the table  FOREIGN KEY CONSTRAINT -   Used to ensure referential integrity of the data  Primary Key - is used uniquely to identify each row in a table . It can consist of one or more columns on a table . When Multiple columns are used on a table it is called composite key.  Foreign Key - Foreign key is a column or columns that references a column most often primary key of another table . The purpose of foreign key is to maintain referential integrity of the data. Pg admin  Data base - training - right click on training - query click  Always add semi colen to run the query  Int - integer  varchar - variable charact
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Objectives of Risk

 Risk can be internal or external factor .

We need to understand it is volatile and cannot be or can be controlled.

Objective of risk management -

1. Analyse and control different kind of risk that organisation faces like market risk etc.

2. Achieve better coordination between different terms within the organisation to effectively dilute.

3. Risk based allocation of capital - so that the capital becomes more effective , we need funds to put in various department , so we need to make sure it is effective .

4. Provide a framework - not a constant it can monthly report , weekly updates etc to reduce risk. 

5. Better handling of risk for competitive advantage 


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