SQL Exercises: List all employees in departments 89 and 63

SQL SUBQUERY: Exercise-35 with Solution

35. From the following tables, write a SQL query to find the employees who work in department 89 or 63. Return emp_idno, emp_fname, emp_lname and emp_dept.

 EMP_IDNO EMP_FNAME       EMP_LNAME         EMP_DEPT
--------- --------------- --------------- ----------
   127323 Michale         Robbin                  57
   526689 Carlos          Snares                  63
   843795 Enric           Dosio                   57
   328717 Jhon            Snares                  63
   444527 Joseph          Dosni                   47
   659831 Zanifer         Emily                   47
   847674 Kuleswar        Sitaraman               57
   748681 Henrey          Gabriel                 47
   555935 Alex            Manuel                  57
   539569 George          Mardy                   27
   733843 Mario           Saule                   63
   631548 Alan            Snappy                  27
   839139 Maria           Foster                  57

Sample Solution:

-- Selecting all columns from the 'emp_details' table
SELECT * 
-- Specifying the table to retrieve data from ('emp_details')
FROM emp_details
-- Filtering the results based on the condition that 'emp_dept' is in the set (89, 63)
WHERE emp_dept IN (89, 63);

Output of the Query:

emp_idno	emp_fname	emp_lname	emp_dept
526689		Carlos		Snares		63
328717		Jhon		Snares		63
733843		Mario		Saule		63

Explanation:

The above SQL query is selecting all columns and rows from the 'emp_details' table where the department number of the employee is either 89 or 63.
By using the IN operator, the query checks if a value is present within a list of values, and if so, the row will be returned.

Visual Explanation:

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Query Visualization:

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