Consider the tables with their respective fields below:employees: emp_id, dept_id, manager_id, last_namedepartments: dept_id, manager_id, dept_name, location_idYou want to create a report displaying employees last names, department names and locations, Which query should you use to create an INNER JOIN?1 point54321 ON e.dept_id = d.dept_id;JOIN departments dFROM employees eSELECT e.last_name, d.dept_name, d.location_id
Question
Consider the tables with their respective fields below:employees: emp_id, dept_id, manager_id, last_namedepartments: dept_id, manager_id, dept_name, location_idYou want to create a report displaying employees last names, department names and locations, Which query should you use to create an INNER JOIN?1 point54321 ON e.dept_id = d.dept_id;JOIN departments dFROM employees eSELECT e.last_name, d.dept_name, d.location_id
Solution
The correct query to create an INNER JOIN would be:
SELECT e.last_name, d.dept_name, d.location_id
FROM employees e
JOIN departments d
ON e.dept_id = d.dept_id;
This query works as follows:
-
SELECT e.last_name, d.dept_name, d.location_id: This line is selecting the fields that will be displayed in the report. It's selecting thelast_namefield from theemployeestable, and thedept_nameandlocation_idfields from thedepartmentstable. -
FROM employees e: This line is specifying the first table that we're using for the join, which is theemployeestable. Theeafteremployeesis an alias for theemployeestable, which makes the query easier to read and write. -
JOIN departments d: This line is specifying the second table that we're using for the join, which is thedepartmentstable. Thedafterdepartmentsis an alias for thedepartmentstable. -
ON e.dept_id = d.dept_id;: This line is specifying the condition for the join. It's saying that we should match rows from theemployeesanddepartmentstables where thedept_idfield is the same in both tables.
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