Jump to content

Joins, subqueries, confusion


the_924

Recommended Posts

I have a situation with two tables:
CREATE TABLE `quiz`
(
    id int (5) NOT NULL auto_increment,
    title varchar(100) NOT NULL,
    course_id INT(4) NOT NULL,
    question_first_id INT(6) NOT NULL,
    question_last_id INT(6) NOT NULL,
    question_list text NOT NULL,
    PRIMARY KEY (id)
);

and

CREATE TABLE `course`
(
    id int (5) NOT NULL auto_increment,
    name varchar(100) NOT NULL,
    description text NOT NULL,
    PRIMARY KEY (id)
);

I'm trying to query the Quiz table and generate a table that would, ideally, look something like this:
[table]
[tr][td][b]Quiz name    [/b][/td]    [td][b]Quiz course[/b][/td][/tr]
[tr][td]Lesson 1[/td][td]AP Euro History[/td][/tr]
[tr][td]Lesson 1[/td][td]AP US History[/td][/tr]
[tr][td]Fun quiz[/td][td] - NO COURSE! -[/td][/tr]
[/table]

However, since I want the Course names, and not ID's, I need to "join" them together (I think); I want the query results to look like this:
[table]
[tr][td][b]quiz.id    [/b][/td]    [td][b]quiz.name    [/b][/td]    [td][b]course.name    [/b][/td][/tr]
[tr][td]1[/td][td]Lesson 1[/td][td]AP Euro History[/td][/tr]
[tr][td]2[/td][td]Lesson 1[/td][td]AP US History[/td][/tr]
[tr][td]2[/td][td]Fun quiz[/td][td][/td][/tr]
[/table]
Link to comment
Share on other sites

Update:
This is what I've gotten so far,
[code]SELECT q.id, q.course_id, q.title, c.id, c.name
FROM ft_quiz q, ft_course c
WHERE q.course_id = c.id[/code]

But it leaves out the quizzes that aren't attatched to a course; still working on it :D

EDIT:
[table]
[tr][td][b]id [/b][/td][td][b]course_id    [/b][/td][td][b]title    [/b][/td][td][b]id    [/b][/td][td][b]name    [/b][/td][/tr]
[tr][td]1[/td][td]1[/td][td]AP US Quiz[/td][td]1[/td][td]US History (AP)[/td][/tr]
[tr][td]2[/td][td]0[/td][td]Quiz - No Course[/td][td]1[/td][td]US History (AP)[/td][/tr]
[tr][td]2[/td][td]0[/td][td]Quiz - No Course[/td][td]2[/td][td]Euro History (AP)[/td][/tr]
[/table]
Link to comment
Share on other sites

This thread is more than a year old. Please don't revive it unless you have something important to add.

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.

Guest
Reply to this topic...

×   Pasted as rich text.   Restore formatting

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.

×
×
  • Create New...

Important Information

We have placed cookies on your device to help make this website better. You can adjust your cookie settings, otherwise we'll assume you're okay to continue.