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BIS05 Introduction to SQL

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Prithwis Mukerjee
Prithwis Mukerjee

Course Material for MBA Course on Business Information Systems

FormationÉconomie & financeBusiness
1  sur  30
Business Information Systems Introduction to SQL Prithwis Mukerjee
Categories of SQL ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Basics of Retrieval - 1 : Projection & Selection ,[object Object],[object Object],[object Object],[object Object],[object Object]
Basics of Retrieval – 2 : JOIN ,[object Object],JOIN
The Retrieval Process Select EmpID, LastName, FirstName, Location from Employee, Department where Employee.Dept = Department.Dept_ID SQL statement entered through a program Output returned to another program OR screen Actual Data stored in the RDBMS ‘engine’
Some ‘Select’ statements ,[object Object],[object Object],[object Object]
‘Where’ : to eliminate some rows ,[object Object],[object Object],[object Object]
Do you LIKE wildcards ? ,[object Object],[object Object],[object Object]
IN - BETWEEN ,[object Object],[object Object]
Order ! Order !! ,[object Object],[object Object]
More Restrictions : AND ,[object Object],[object Object],[object Object],[object Object]
Less Restrictions : OR ,[object Object],[object Object]
Matters of Precedence ,[object Object],[object Object]
Functions … ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Single Row Functions ,[object Object],[object Object],[object Object]
Multiple Row Functions .. ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
MultiRow Functions : Group By & Having ,[object Object],[object Object]
Variety of Single Row Functions ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],This is only an illustrative subset. There are many more each with its own syntax ….
Join : accessing data from two tables ,[object Object],[object Object]
Cartesian Product ,[object Object],[object Object],[object Object],[object Object],[object Object]
The Outer Join ,[object Object],[object Object],[object Object],[object Object]
Outer Join ,[object Object],[object Object]
Full Outer JOIN ,[object Object]
SubQuery : An Alternate to JOIN ,[object Object],[object Object]
SELF JOIN : Joining a Table to itself ,[object Object],[object Object],[object Object],[object Object],[object Object]
Self join ,[object Object]
Insert .. ,[object Object]
Update .. ,[object Object]
Delete .. ,[object Object]
Create View ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

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BIS05 Introduction to SQL

  • 1. Business Information Systems Introduction to SQL Prithwis Mukerjee
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  • 5. The Retrieval Process Select EmpID, LastName, FirstName, Location from Employee, Department where Employee.Dept = Department.Dept_ID SQL statement entered through a program Output returned to another program OR screen Actual Data stored in the RDBMS ‘engine’
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