Complete SAS Programming Guide - Learn SAS and Become a Data Ninja - How to Perform an Inner Join

The video tutorial covers the concept of inner joins in SQL, focusing on using PROC SQL to join two tables based on a common column, employee ID. It explains the use of table aliases to simplify SQL queries and demonstrates how to select specific columns from joined tables. The tutorial also compares using the WHERE clause and the INNER JOIN keyword for performing joins. Additionally, it addresses handling missing values in datasets, providing techniques to include or exclude incomplete records.

What is the common column between the 'human resources' and 'contact info' tables?

• First Name

• Employee ID

• Title

• Phone Number

What is the purpose of using table aliases in SQL?

• To create new tables

• To rename columns

• To simplify table references

• To change data types

How can you select all columns from a table using a shorthand method?

• Using the keyword 'ALL'

• Using the keyword 'SELECT'

• Using the keyword 'COLUMN'

• Using the asterisk (*) symbol

What is the purpose of the ORDER BY clause in SQL?

• To filter rows

• To join tables

• To sort the result set

• To group data

What happens if you select all columns from both tables in an inner join?

• You get no columns

• You get only unique columns

• You get an error

• You get duplicate columns

How can you exclude rows with missing values in a specific column?

• Using the 'is not null' operator

• Using the 'is null' operator

• Using the 'is not missing' operator

• Using the 'is missing' operator

What does the 'is missing' operator do in SQL?

• Includes only rows with missing values

• Excludes rows with missing values

• Excludes all rows

• Includes all rows