使用SQL（mysql）将一个子查询的结果附加到另一个子查询的结果

Question

I have two mysql tables. And essentially two queries (one to each table) that I want to combine within a single SQL Query. Seems like it should be easy (kind of like an inner Join) But inner join is DUPLICATING non-uniqe values from table 2 into my results array... I dont want them duplicated... I want those duplicates from table/query 2 combined into the result record of query1

Query 1 Gets records from table 1. Results are unique. (one ID returns one record) It's simply returning all fields on records where an ID is equal to one of my conditions. [Im using IN instead of a bunch of OR's)

$sid = "'M-179','M-242','M-231','Q-2thru5'" ; 
$query = "SELECT * FROM table1 WHERE IN ($sid)`

Query 2 gets records from table 2. But results are NOT unique. One ID can return many records.

$query2 = "SELECT extra_data, pub_url FROM table2 WHERE IN ($sid)";

So I want EACH extra_data & pub_url field from ALL returned records just slapped onto the end of the query 1 result. Am I making sense? So the result would look something like this...

[0] => Array
        (
            * all my returned fields from the 
             record returned by query 1 here
            $row['extra_data']  
            $row['pub_url']  <-returned record from query 2
            $row['extra_data'] 
            $row['pub_url']  <-another returned record from query 2
            $row['extra_data'] 
            $row['pub_url']  <-any another returned 
                              record from query 2, etc..
        )

Answer 1

What do you mean by combining the result?

Do you want the results from query2 to appear in the same relevant rows but just extra columns, or you want them to appear as new rows.

For the first case, you will have to use JOIN .

But I have a feeling that what you want to do is the second case. In this case, you will have to use UNION . Note, however, that in this case the columns of the two queries must match. So the union of two queries would look like this:

-- pseudo code only
SELECT extra_data, pub_url FROM table1 WHERE IN ($sid)
union
SELECT extra_data, pub_url FROM table2 WHERE IN ($sid)

Answer 2

Try something similar to this, which would join the results of table 1 to table 2 on the column containing the sid value.

SELECT a.*, b.extra_data, pub_url
FROM table1 a
left outer join table2 b on a.sid = b.sid 
WHERE a.sid IN ($sid)