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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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SKILLS YOU SHOULD KNOW NOW!!!

             BEST 2022 DEMANDING SKILLS

You all might think what courses you must try for 2022 year as a new year resolution.But might wondering what is that which must be so demanding or will upgrade your CV and of course your skills too . wait ! wait! now your curiosity is over .Lets now see -
  


  • LEARN A LANGUAGE - Language today in this century has become the most important acceptable thing needed in the working space or in your industry and it might be your interest . There have been many as in case of interest but if considering the working space then here is the listed languages

  1. GERMAN
  2. SPANISH 
  3. MANDARIN 
  4. KOREAN 

  • WRITING A BLOG - Blog writing in todays era has become the most trending type . because writing content and selling it into google or any other website platform increases your earnings as well as upgrade your skills. It totally depends upon you that are you interested in writing or wanted to polish your writing skills to get the benefit .  


  • LEARN A COMPUTER LANGUAGE - Computer language learning is the high demand skill which is actually a need of today’s industry whether or is in the IT sector or in your "Big 4". Learning it increases your demand in the work space and hence surely there will be rise of your salary.

  • PROFESSIONAL COURSES- It is important now a days to upgrade your skill by enrolling yourself into any professional course and getting the certificate  and it is but obvious to get job in your dream company .It may be useful when you are having your own start up.some of the listed trending now are -
  1. ACCA 
  2. CPA
  3. CFA
  4. CA
  5. CS

  • NEWS- We all know news is something which cannot be neglected whether it is 2022 or 2050 . Every happening must be taken care of as you are living in the world of happenings where in a seconds presidents , prime ministers , elected bodies are changed . what is important to know in the business sector and what is the trending news which can groom yourself.
conclusion 
Hope that you enjoyed reading!
HAPPY LEARNING !!



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