MySQL 2 Tables, query before insert - mysql

Question

I'm perplexed, here is what I have.
Two tables, one is temporary, one is permanent.
table Temptable:
city , state //- has a list of 20 citys and states
table Permtable:
city , state //- has hundreds of citys and states
I want to do two things:
I want to use city and state from Temptable and query the Permtable to see if it already contains
that city and state. If it doesn't I want it to add it.
IF it has a match in city and state, I want it to play c:\sound.wav and then I want it add it to the
permtable.
I am lost as to how to do this.

Answer 1

This will tell you which records exist or don't exist from your TempTable:
SELECT T.City, T.State, CASE WHEN P.State IS NULL THEN 'DOES NOT EXIST' ELSE 'DOES EXIST' END
FROM TempTable T
LEFT JOIN PermTable P ON T.City = P.City AND T.STate = P.State
You can INSERT those records that don't exists in the PermTable like such:
INSERT INTO PermTable
SELECT T.City, T.State
FROM TempTable T
LEFT JOIN PermTable P ON T.City = P.City AND T.STate = P.State
WHERE P.State IS NULL
Not sure about your requirement to play a sound and it doesn't make sense to then add it (since it already exists).

Answer 2

Since we have no code to run with here, query temptable for city and state, then query SELECT COUNT(id) FROM permtable WHERE city='$tempcity' AND state='$tempstate'.
Then user mysqli_num_rows on your query to see if any matches were found.
$q= "SELECT COUNT(*) FROM temptable WHERE city='$tempcity' AND state='$tempstate'";
$r = #mysqli_query($dbc, $q);
if(mysqli_num_rows($r) != 0) {
echo "<embed src =\"sound.wav\" hidden=\"true\" autostart=\"true\"></embed>";
}
else {
//Do your other stuff.
}
It really depends on how you have your table set up. If you have column 'State' and column 'City' where 'City' is something like 'Dallas-Austin-Houstin-San Antonio' then you will have to query for 'State', explode the value of 'City' into an array, run a while to check for $tempcity in the array, which would look like the following:
$q = "SELECT city FROM permtable WHERE state='$tempstate'";
$r = #mysqli_query($dbc, $q);
$row = mysqli_fetch_array($r, MYSQLI_ASSOC);
if (mysqli_num_rows($r) == 1) { //STATE MATCH
$cityCheck = explode("-", $row['city']);
$i = 0;
$count = count($cityCheck);
$goodMatch = 0;
while ($i < $count) { //find out if user already voted on post
if ($cityCheck[$i] == $tempcity) {
$goodMatch = 1;
} //City State match
else { } //City does not match with state, continue while loop.
$i++;
} //END WHILE
else { } //STATE DID NOT MATCH
if ($goodmatch) {
echo "<embed src =\"sound.wav\" hidden=\"true\" autostart=\"true\"></embed>";
}
else {}