SQL JOIN not working the way i need - php

Question

Hi guys im have trouble with a SQL join statement. i cant seem to get it to work the way i want
ex.
TABLE1 TABLE 2
ID NAME ID INFO
1 JOE 1 YES
2 MIKE 1 NO
3 JESS 1 MAYBE
4 ROB 2 NO
2 NO
$stid = oci_parse($conn, "
SELECT * FROM TABLE1 TBL1 RIGHT JOIN TABLE2 TBL2
ON (TBL1.ID = TBL2.ID0 WHERE TBL1.ID = '1'
");
oci_execute($stid);
while (($row = oci_fetch_array($stid, OCI_BOTH+OCI_RETURN_NULLS)) != false) {
echo $row['NAME']."<br/ >";
echo $row['INFO']."<br/ >";
}
what i want to see is
RESULT
JOE
YES
NO
MAYBE
typically what i get (regardless of join type) is something like
JOE
YES
JOE
NO
JOE
MAYBE
any help would be great.

Answer 1

don't use rigth join, change it for left join
SELECT * FROM TABLE1 TBL1 LEFT JOIN TABLE2 TBL2
ON (TBL1.ID = TBL2.ID) WHERE TBL1.ID = '1'

Answer 2

First of all, you need to change the RIGHT JOIN to LEFT JOIN (or simple JOIN, check your requirements). Now for the main part of your problem: the JOIN works as expected, you need to use your favourite language to do something like that:
Pseudocode
var test_name = "";
var last_name = "";
while EXIST_MORE_RECORDS {
test_name = $row['NAME'];
if (test_name != last_name) {
last_name = test_name;
print last_name;
}
print $row['INFO']."<br/ >";
}

Answer 3

Look at the results of your query:
+----+------+----+-------+
| ID | NAME | ID | INFO |
+----+------+----+-------+
| 1 | JOE | 1 | MAYBE |
| 1 | JOE | 1 | NO |
| 1 | JOE | 1 | YES |
+----+------+----+-------+
Now look at your loop. You're outputting NAME and INFO for each row. You could alter your loop like #giorgos-altanis suggests.
You could also change your query to use UNION, and grab the NAME and INFO separately so that each is its own row.
select Name VALUE, 0 sortorder
from TABLE1
where ID = '1'
union
select Info VALUE, 1 sortorder
from TABLE2
where ID = '1'
order by sortorder
This would give you results like :
+-------+-----------+
| VALUE | sortorder |
+-------+-----------+
| JOE | 0 |
| MAYBE | 1 |
| NO | 1 |
| YES | 1 |
+-------+-----------+
Then you could use a simple loop. Hard to say whether this would be an appropriate solution to your actual code.
Note that the order of rows from Table2 cannot be guaranteed. If you want them to appear in order of YES, NO, MAYBE, you'll need an additional field in the table to define the sort order (or maybe a CASE statement).
UPDATE
If all you want is the count of the rows from Table2 (which is a completely different question), then you just need to join the tables and then group on the NAME:
select TBL1.ID, TBL1.NAME, COUNT(1) TBL2COUNT
from TABLE1 TBL1
join TABLE2 TBL2 on TBL1.ID = TBL2.ID
where TBL1.ID = '1'
group by tbl1.ID, TBL1.NAME