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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 - ...
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What actually logistics mean ?

 LOGISTICS - Lets say you are running some sort of business , you get order from customer 

What all you do complete the order ?

What steps will come in picture in order to complete the order ? ( say order of 5 neck pieces )

Lets assume we have ready made jewellery , we outsource it with somebody , we many check the inventory , packaging , courier , their packaging , transportation , e invoice it will get delivered .

This is nothing but logistics in simple term .

Something which is made in point of production to delivering it to customer .

It creates the value but not monetary value .

Your primary function in logistics is packaging, warehousing, material handling .

Supply chain management is more complex.

So it is process of planning , implementing and controlling the flow of goods and services from point of production to the place of consumption for confirming to customer satisfaction .


# 7 R's of Logistics 

Right product ,  right quantity , right place , right time , right customer , right price , right condition .

Right Product -The product must be what the customer is expecting 

Right customer- whomsoever it has to reach should reach 

Right Price -The fair price of the customer we are offering 

Right time - on time the raw material reaches to me 

Right condition -through packaging and production , the product is not damaged .



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