SQLite Exercise: List the number of jobs available in the employees table

Write a query to list the number of jobs available in the employees table.

Sample table : employees

SQLite Code :

SELECT COUNT(DISTINCT job_id) 
FROM employees;

Output:

COUNT(DISTINCT job_id)
----------------------
19

Relational Algebra Expression:

Relational Algebra Tree:

Practice SQLite Online

Model Database

Structure of 'hr' database :

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