Question

Users

id, first, last
1   John   Johnsson
2   Mark   Jackson
3   Chris  Lager

Tags

id, userID, tag,       pass,        active
1   2       42564eb6   <some hash>  1
2   1       524846b6   <some hash>  0

What i want to output is this combination of data:

Tags

ID(from user), First name, Last name, Tag number, Password hash, Active
1              John        Johnsson   524846b6    <hash>         0
2              Mark        Jackson    42564eb6    <hash>         1
3              Chris       Lager                                  

So basically, I want a table with users, ordered by their ID’s, with the tag number, pass and active fields if applicable

I’m using webbased databases with PHPMyAdmin on an external server, and I am querying on it in Java through JDBC.

My question: what query do I need to use for this? I’m not really sure what commands such as Group By or Order By will do with my data, which comes in as a ResultSet object in Java.

Answer 1

I think it’s a LEFT JOIN, eg:

select
u.id,
u.first as [First Name],
u.Last as [Last name],
t.tag as [Tag Number],
t.pass as [Password],
t.Active
FROM [user] as u
LEFT JOIN [Tags] T ON U.id=T.UserId
ORDER BY u.[id] ASC