What will be the query for the following?

Question

1.00/5 (2 votes)

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Suppose there are 2 tables, employee and jobs. Jobid is a FK in employees table referring the jobs table. What is the suitable option to find the rows in employee that violate foreign key constraints?

(a)

SQL

SELECT employee.emp_id,employee.job_id FROM employee LEFT OUTER JOIN jobs ON employee.job_id<>jobs.job_id

(b)

SQL

SELECT employee.emp_id,employee.job_id FROM employee LEFT OUTER JOIN jobs ON employee.job_id=jobs.job_id

(c )

SQL

SELECT employee.emp_id,employee.job_id FROM employee LEFT OUTER JOIN jobs ON employee.job_id=jobs.job_id WHERE (jobs.job_id IS NULL)

(d)

SQL

SELECT employee.emp_id,employee.job_id FROM employee INNER JOIN jobs ON employee.job_id=jobs.job_id WHERE (jobs.job_id IS NULL)

Posted 10-Apr-14 18:34pm

Hariom Goyal

Updated 10-Apr-14 19:49pm

Maciej Los

v2

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Peter Leow 11-Apr-14 0:57am

Homework is not question.

2 solutions

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Kabi Pr. Sahoo · Answer 1 · 2014-04-10T19:44:00

Solution 2

select * from employee
except
select abc.* from employee inner join jobs on employee.job_id = jobs.job_id
and employee.job_id is not null

Posted 10-Apr-14 19:44pm

Kabi Pr. Sahoo

Nayan Ambaliya · Answer 2 · 2014-04-10T18:54:00

Solution 1

SQL

select employee.emp_id, employee.job_id 
from employee 
left outer join jobs on employee.job_id = jobs.job_id
where employee.job_id is null or employee.job_id <> jobs.job_id

Posted 10-Apr-14 18:54pm

Nayan Ambaliya

Comments

Peter Leow 11-Apr-14 0:59am

Homework is not question.

Ariel Badilles 14-Apr-14 3:58am

Indeed.