left join assignment answer
There are 24 manager in department manager table and one manager with last name 'markovitch' . I guess in assignment you asked to find the manager whose last name is 'markovitch'. so, there should be 1 row affected instead of 181.
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This will be the case if we use RIGHT JOIN. Since we use LEFT JOIN we obtain as a result set all records from the left table and the matched from the right table. Actually, the managers are also in the employees table.
Hope this helps.