SQL Exercise: Employees in department 2001 with the designation CLERK
SQL employee Database: Exercise-38 with Solution
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38. From the following table, write a SQL query to find those employees whose designation is ‘CLERK’ and work in the department ID 2001. Return complete information about the employees.
Sample table: employees
SELECT * FROM employees WHERE job_name ='CLERK' AND dep_id = 2001;
emp_id | emp_name | job_name | manager_id | hire_date | salary | commission | dep_id --------+----------+----------+------------+------------+---------+------------+-------- 63679 | SANDRINE | CLERK | 69062 | 1990-12-18 | 900.00 | | 2001 68736 | ADNRES | CLERK | 67858 | 1997-05-23 | 1200.00 | | 2001 (2 rows)
The given query in SQL that selects all the columns from the table 'employees' and returns a subset where the job_name is 'CLERK' and the dep_id is 2001.
The WHERE clause filters the subset that 'job_name' column must have a value of 'CLERK', and the 'dep_id' column must have a value of 2001.
Relational Algebra Expression:
Relational Algebra Tree:
Sample Database: employee
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Previous SQL Exercise: List the Employees who work for department 1001 or 2001.
Next SQL Exercise: List ID, name, salary, and job_name of the employees.
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