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POSQL Query GROUP BY
 

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  1. POSQL Query GROUP BY
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    <p>I have the following record and values:</p> <pre><code>create table student ( LastName varchar(40), FirstName varchar(40), SID number(5), SSN number(9), Career varchar(4), Program varchar(10), City varchar(40), Started number(4), primary key (SID), unique(SSN) ); create table enrolled ( StudentID number(5), CourseID number(4), Quarter varchar(6), Year number(4), primary key (StudentID, CourseID), foreign key (StudentID) references student(SID), foreign key (CourseID) references course(CID) ); insert into student values ( 'Brennigan', 'Marcus', 90421, 987654321, 'UGRD', 'COMP-GPH', 'Evanston', 2001 ); insert into student values ( 'Patel', 'Deepa', 14662, null, 'GRD', 'COMP-SCI', 'Evanston', 2003 ); insert into student values ( 'Snowdon', 'Jonathan', 08871, 123123123, 'GRD', 'INFO-SYS', 'Springfield', 2005 ); insert into student values ( 'Starck', 'Jason', 19992, 789789789, 'UGRD', 'INFO-SYS', 'Springfield', 2003 ); insert into student values ( 'Johnson', 'Peter', 32105, 123456789, 'UGRD', 'COMP-SCI', 'Chicago', 2004 ); insert into student values ( 'Winter', 'Abigail', 11035, 111111111, 'GRD', 'PHD', 'Chicago', 2003 ); insert into student values ( 'Patel', 'Prakash', 75234, null, 'UGRD', 'COMP-SCI', 'Chicago', 2001 ); insert into student values ( 'Snowdon', 'Jennifer', 93321, 321321321, 'GRD', 'COMP-SCI', 'Springfield', 2004 ); insert into enrolled values (11035, 1020, 'Fall', 2005); insert into enrolled values (11035, 1092, 'Fall', 2005); insert into enrolled values (11035, 8772, 'Spring', 2006); insert into enrolled values (75234, 3201, 'Winter', 2006); insert into enrolled values (08871, 1092, 'Fall', 2005); insert into enrolled values (90421, 8772, 'Spring', 2006); insert into enrolled values (90421, 2987, 'Spring', 2006); </code></pre> <p>My goal is to: List (pairs of) students that have taken the same class together. </p> <p>Expected output:</p> <pre><code>StudentID COURSEID 11035 1092 8871 1092 11035 8772 90421 8772 </code></pre> <p>How can I achieve this?</p> <p>Thanks,</p>
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    1. USSohel Mansuri
    1. USSohel Mansuri
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    1. This table or related slice is empty.
    1. This table or related slice is empty.
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      1. POSQL Query GROUP BY
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    1. COWhich is your database?
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      1. USTechDo
    2. COI use Oracle SQL Developer.
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      1. USSohel Mansuri
    3. COTable `course` is missing in the create script.
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