Skip to main content

Featured

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
Post a Comment
Read more

Introduction to Investing

Investing is money set aside money with expectations of obtaining additional income or profit.

Investing comes with risks or losses .


Fixed Income - LOW 

Cash - LOW 

Real estate - Medium 

Commodities - Medium 

Equity - High 

Derivatives - High 


What is Capital ?

I wanted to do a business for that I invested 100000. When anyone invest in business is called capital. 

Capital in case of Company - There are many owners. 


When shares price rise , you may sell the shares for that higher price . This is known as Capital Appreciation . 


 


Comments

Post a Comment

Popular Posts