I am getting error during executing the function “subquery must return only one column”
1
I am getting error as "subquery must return only one column". Because i have more employees in each department. Tell me the solution to fix this issue
CREATE OR REPLACE FUNCTION dept_emp()
RETURNS TEXT AS
$$
DECLARE
cur_dept CURSOR FOR SELECT dept_name FROM dept;
cur_emp CURSOR FOR SELECT employee_id,dob,department FROM emp;
d RECORD;
e RECORD;
BEGIN
FOR d IN SELECT dept_name FROM dept
LOOP
FOR e IN SELECT employee_id,dob,department FROM emp
LOOP
RAISE NOTICE 'Department: %',d.dept_name;
RETURN (SELECT employee_id,dob FROM emp WHERE d.dept_name=e.department);
END LOOP;
END LOOP;
END;
$$ LANGUAGE 'plpgsql';
sql postgresql subquery
edited Nov 23 '18 at 11:17
a_horse_with_no_name
292k46446541
asked Nov 23 '18 at 10:11
DeepanDeepan
61
|
show 2 more comments
1
I am getting error as "subquery must return only one column". Because i have more employees in each department. Tell me the solution to fix this issue
CREATE OR REPLACE FUNCTION dept_emp()
RETURNS TEXT AS
$$
DECLARE
cur_dept CURSOR FOR SELECT dept_name FROM dept;
cur_emp CURSOR FOR SELECT employee_id,dob,department FROM emp;
d RECORD;
e RECORD;
BEGIN
FOR d IN SELECT dept_name FROM dept
LOOP
FOR e IN SELECT employee_id,dob,department FROM emp
LOOP
RAISE NOTICE 'Department: %',d.dept_name;
RETURN (SELECT employee_id,dob FROM emp WHERE d.dept_name=e.department);
END LOOP;
END LOOP;
END;
$$ LANGUAGE 'plpgsql';
sql postgresql subquery
edited Nov 23 '18 at 11:17
a_horse_with_no_name
292k46446541
asked Nov 23 '18 at 10:11
DeepanDeepan
61
5
Your function return only one value of type text. But in your return clause you try to return 'employee_id,dob' which is obviously not a simple text value.
– StephaneM
Nov 23 '18 at 10:14
In my dept table i'm having 10 departments. In emp table am having 30 records(3 records for each department). Thats Y it returns 'more than one row returned'.
– Deepan
Nov 23 '18 at 11:11
My Output should looks like this
– Deepan
Nov 23 '18 at 11:13
I need a output like this Department : Sales 1.employee_id, dob 2.employee_id, dob 3.employee_id, dob Department : Marketing 1.employee_id, dob 2.employee_id, dob 3.employee_id, dob
– Deepan
Nov 23 '18 at 11:14
1
Why don't you just join all those tables in a simple SQL statement? Nested FOR loops or even a function seems completely unnecessary here.
– a_horse_with_no_name
Nov 23 '18 at 11:18
|
show 2 more comments
1
1
1
I am getting error as "subquery must return only one column". Because i have more employees in each department. Tell me the solution to fix this issue
CREATE OR REPLACE FUNCTION dept_emp()
RETURNS TEXT AS
$$
DECLARE
cur_dept CURSOR FOR SELECT dept_name FROM dept;
cur_emp CURSOR FOR SELECT employee_id,dob,department FROM emp;
d RECORD;
e RECORD;
BEGIN
FOR d IN SELECT dept_name FROM dept
LOOP
FOR e IN SELECT employee_id,dob,department FROM emp
LOOP
RAISE NOTICE 'Department: %',d.dept_name;
RETURN (SELECT employee_id,dob FROM emp WHERE d.dept_name=e.department);
END LOOP;
END LOOP;
END;
$$ LANGUAGE 'plpgsql';
sql postgresql subquery
edited Nov 23 '18 at 11:17
a_horse_with_no_name
292k46446541
asked Nov 23 '18 at 10:11
DeepanDeepan
61
I am getting error as "subquery must return only one column". Because i have more employees in each department. Tell me the solution to fix this issue
CREATE OR REPLACE FUNCTION dept_emp()
RETURNS TEXT AS
$$
DECLARE
cur_dept CURSOR FOR SELECT dept_name FROM dept;
cur_emp CURSOR FOR SELECT employee_id,dob,department FROM emp;
d RECORD;
e RECORD;
BEGIN
FOR d IN SELECT dept_name FROM dept
LOOP
FOR e IN SELECT employee_id,dob,department FROM emp
LOOP
RAISE NOTICE 'Department: %',d.dept_name;
RETURN (SELECT employee_id,dob FROM emp WHERE d.dept_name=e.department);
END LOOP;
END LOOP;
END;
$$ LANGUAGE 'plpgsql';
sql postgresql subquery
sql postgresql subquery
edited Nov 23 '18 at 11:17
a_horse_with_no_name
292k46446541
asked Nov 23 '18 at 10:11
DeepanDeepan
61
edited Nov 23 '18 at 11:17
a_horse_with_no_name
292k46446541
asked Nov 23 '18 at 10:11
DeepanDeepan
61
edited Nov 23 '18 at 11:17
a_horse_with_no_name
292k46446541
edited Nov 23 '18 at 11:17
a_horse_with_no_name
292k46446541
edited Nov 23 '18 at 11:17
a_horse_with_no_name
292k46446541
292k46446541
asked Nov 23 '18 at 10:11
DeepanDeepan
61
asked Nov 23 '18 at 10:11
DeepanDeepan
61
asked Nov 23 '18 at 10:11
DeepanDeepan
61
61
5
Your function return only one value of type text. But in your return clause you try to return 'employee_id,dob' which is obviously not a simple text value.
– StephaneM
Nov 23 '18 at 10:14
In my dept table i'm having 10 departments. In emp table am having 30 records(3 records for each department). Thats Y it returns 'more than one row returned'.
– Deepan
Nov 23 '18 at 11:11
My Output should looks like this
– Deepan
Nov 23 '18 at 11:13
I need a output like this Department : Sales 1.employee_id, dob 2.employee_id, dob 3.employee_id, dob Department : Marketing 1.employee_id, dob 2.employee_id, dob 3.employee_id, dob
– Deepan
Nov 23 '18 at 11:14
1
Why don't you just join all those tables in a simple SQL statement? Nested FOR loops or even a function seems completely unnecessary here.
– a_horse_with_no_name
Nov 23 '18 at 11:18
|
show 2 more comments
5
Your function return only one value of type text. But in your return clause you try to return 'employee_id,dob' which is obviously not a simple text value.
– StephaneM
Nov 23 '18 at 10:14
In my dept table i'm having 10 departments. In emp table am having 30 records(3 records for each department). Thats Y it returns 'more than one row returned'.
– Deepan
Nov 23 '18 at 11:11
My Output should looks like this
– Deepan
Nov 23 '18 at 11:13
I need a output like this Department : Sales 1.employee_id, dob 2.employee_id, dob 3.employee_id, dob Department : Marketing 1.employee_id, dob 2.employee_id, dob 3.employee_id, dob
– Deepan
Nov 23 '18 at 11:14
1
Why don't you just join all those tables in a simple SQL statement? Nested FOR loops or even a function seems completely unnecessary here.
– a_horse_with_no_name
Nov 23 '18 at 11:18
5
5
Your function return only one value of type text. But in your return clause you try to return 'employee_id,dob' which is obviously not a simple text value.
– StephaneM
Nov 23 '18 at 10:14
Your function return only one value of type text. But in your return clause you try to return 'employee_id,dob' which is obviously not a simple text value.
– StephaneM
Nov 23 '18 at 10:14
In my dept table i'm having 10 departments. In emp table am having 30 records(3 records for each department). Thats Y it returns 'more than one row returned'.
– Deepan
Nov 23 '18 at 11:11
In my dept table i'm having 10 departments. In emp table am having 30 records(3 records for each department). Thats Y it returns 'more than one row returned'.
– Deepan
Nov 23 '18 at 11:11
My Output should looks like this
– Deepan
Nov 23 '18 at 11:13
My Output should looks like this
– Deepan
Nov 23 '18 at 11:13
I need a output like this Department : Sales 1.employee_id, dob 2.employee_id, dob 3.employee_id, dob Department : Marketing 1.employee_id, dob 2.employee_id, dob 3.employee_id, dob
– Deepan
Nov 23 '18 at 11:14
I need a output like this Department : Sales 1.employee_id, dob 2.employee_id, dob 3.employee_id, dob Department : Marketing 1.employee_id, dob 2.employee_id, dob 3.employee_id, dob
– Deepan
Nov 23 '18 at 11:14
1
1
Why don't you just join all those tables in a simple SQL statement? Nested FOR loops or even a function seems completely unnecessary here.
– a_horse_with_no_name
Nov 23 '18 at 11:18
Why don't you just join all those tables in a simple SQL statement? Nested FOR loops or even a function seems completely unnecessary here.
– a_horse_with_no_name
Nov 23 '18 at 11:18
|
show 2 more comments
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5
Your function return only one value of type text. But in your return clause you try to return 'employee_id,dob' which is obviously not a simple text value.
– StephaneM
Nov 23 '18 at 10:14
In my dept table i'm having 10 departments. In emp table am having 30 records(3 records for each department). Thats Y it returns 'more than one row returned'.
– Deepan
Nov 23 '18 at 11:11
My Output should looks like this
– Deepan
Nov 23 '18 at 11:13
I need a output like this Department : Sales 1.employee_id, dob 2.employee_id, dob 3.employee_id, dob Department : Marketing 1.employee_id, dob 2.employee_id, dob 3.employee_id, dob
– Deepan
Nov 23 '18 at 11:14
1
Why don't you just join all those tables in a simple SQL statement? Nested FOR loops or even a function seems completely unnecessary here.
– a_horse_with_no_name
Nov 23 '18 at 11:18