It seems that we have to insert a column of contract_no in the dept_empt so we can solve this task as follows: SELECT emp_no, count(contract_no) FROM dept_emp WHERE from_date > '2000-01-01' GROUP BY emp_no HAVING COUNT(contract_no) > 1 ORDER BY emp_no; Need your explanation. thanks

Hi Asmaa! It does not matter which column you will use in the COUNT() function, since all columns have the same length. Actually, the table dept_emp does not have such a column manager_no. This table has 4 columns – emp_no, dept_no, from_date and to_date. Hope this helps. Best, Tsvetelin

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Asmaa Abdulhamid

Last answered:

16 Dec 2021

Posted on:

22 Nov 2021

Where is the logic in using COUNT(from_date) > 1 in order to count contracts number????

in SQL / WHERE vs HAVING - Part II

1 answers ( 0 marked as helpful)

Tsvetelin Tsonkov

Posted on:

16 Dec 2021

Where is the logic in using COUNT(from_date) > 1 in order to count contracts number????

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