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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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Credit Score

Credit Score 

It measures how trustworthy individuals are. If you want to take out a loan , lenders will view your credit score when decoding whether to give you a loan , and may also use it to determine the loan , and may also use it to determine the loan interest rate . 

It ranges from 300-900 (IBIL Score)

How to increase Credit Score -

@ Always pay for dues in full and on time.

@ Only use 30% of your credit card limit monthly.

@ Do not make any investment that you don’t have the ability to repay comfortably .

@ If you don’t have any loans and payback higher than the amount due as it will help you to build your credibility.

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