在PHP中依次查询多个MSSQL表中的一个值

Question

I have 2 tables i need to query for a single result, but if it's found in $table0, I need to stop searching and use the values in that row. Something like this:

$p1_sql = "SELECT TOP 1 * FROM '$table0' WHERE phone1 = '$cidnumber'";
$p2_sql = "SELECT TOP 1 * FROM '$table0' WHERE phone2 = '$cidnumber'";
$c1_sql = "SELECT TOP 1 * FROM '$table1' WHERE contactphone = '$cidnumber'";
$c2_sql = "SELECT TOP 1 * FROM '$table1' WHERE contactphone2 = '$cidnumber'";
$c3_sql = "SELECT TOP 1 * FROM '$table1' WHERE contactphone3 = '$cidnumber'";
$c4_sql = "SELECT TOP 1 * FROM '$table1' WHERE contactphone4 = '$cidnumber'";

$p1_res = mssql_query($p1_sql);
$p1_row = mssql_num_rows($p1_res);

$p2_res = mssql_query($p2_sql);
$p2_row = mssql_num_rows($p2_row);

$c1_res = mssql_query($c1_sql);
$c1_row = mssql_num_rows($c1_res);

$c2_res = mssql_query($c2_sql);
$c2_row = mssql_num_rows($c2_res);

$c3_res = mssql_query($c3_sql);
$c3_row = mssql_num_rows($c3_res);

$c4_res = mssql_query($c4_sql);
$c4_row = mssql_num_rows($c4_res);

if ($p1_row = 1){
    $p1_res = $newres;
    goto okres;
} elseif ($p2_row = 1) {
    $p2_res = $newres;
    goto okres;
} elseif ($c1_row = 1) {
    $c1_res = $newres;
    goto okres;
} elseif ($c2_row = 1) {
    $c2_res = $newres;
    goto okres;
} elseif ($c3_row = 1) {
    $c3_res = $newres;
    goto okres;
} elseif ($c4_row = 1) {
    $c4_res = $newres;
    goto okres;
} else {
    $newres = "na";
    goto nares;
}

okres:
$cid_sel = mssql_query("SELECT TOP 1 * FROM '$table0' WHERE phone1 = '$cidnumber'");

This, however, is ugly and doesn't work. I was trying to use 'for each...' or 'while (something)', but couldn't wrap my head around how it would work. I don't even know if it would. What's the best way to go about this? It's my first forray into something like this and any help is appreciated.

Answer 1

It's unnecessary to do so many separate queries. Are you familiar with basic SQL, as far as JOINs and UNIONs? If not you should read on them-- what you want here seems achievable with a single query.

Answer 2

I would add the different queries in to an array and loop (using foreach) that array to subsequent query the database. As soon as you find what you're looking for you break out of the loop using the break; command.

Using joins in pure sql could also be a solution, but I'm not entirely sure what you wish to achieve here.

Good luck!