Oracle SQL - Học SQL Từng Bước Một

Update 04/06/2022: Added new exercises

Update 01/04/2016: Closed Captions/Sub Titles are added to the Lectures.

    Learn to become a fee-earning SQL developer in just seven weeks. 

    This fast, easy and effective course will take you from zero sql writing skills to being able to make money as a SQL developer. 

    This one-stop-shot-style SQL course will teach you everything you need to know about SQL, from learning various database concepts to writing SQL to interact with the database. 

    Throughout this SQL course I will be using the below methodology to make you think and help in forming the SQL statement. 

  Business Need: 

               Manager asks you to give you a report containing total sales volume for January month by day and city 

               Questions in your mind to build your SQL query 

• Give?                                                                  SELECT 

• What columns?                                                 DAY, CITY 

• Summary?                                                          SUM(VOLUME) 

• Preposition?                                                      FROM 

• Which table contains sales orders data?      SALES 

• Filter?                                                                WHERE SALES_DATE BETWEEN ’01-JAN-2015’ and ’31-JAN-2015’ 

• Grouping?                                                         GROUP BY DAY, CITY

               Combine the above answers to form the below SQL 

               SELECT day, city, SUM(volume)
               FROM sales
               WHERE sales_date BETWEEN ’01-JAN-2015’ AND ’31-JAN-2015’
               GROUP BY day, city; 

                 In this course participants will learn 

• Relational databases Concepts

• Retrieving Data from Database using SQL Commands (Select)

• Filtering Data based on business requirements using SQL Command (Where)

• Creating Tables and modifying its structure using SQL commands (Create, Alter)

• Joining Data from various Tables using SQL Joins

• Grouping Data and calculating summaries using SQL GROUP BY and SQL Aggregate functions

• Combining data from 2 or more tables using SQL keywords (UNION, UNION ALL, INTERSECT, MINUS)

• Enforcing Constraints on Tables using SQL commands (Create. Alter)

• Creating views using SQL command (Create View)

• Creating other database objects (SYNONYMS, SEQUENCES) using the SQL commands

• Controlling the access to the users using SQL commands (GRANT, REVOKE)

• Improving performance using SQL command (create Index )

• Project Work at the summarize the SQL concepts we learnt.

• and many more interesting things..

  Softwares used 

• Oracle Database 11g

• SQL Developer