how to compare two tables in a db?

What you are trying to achieve ?

I guess you can do this using query only if two tables,[queries] have common field.

Give some more details,we can have some elegant solution out.

JD

Hai JD,
thanks for ur interest.kindly do help me.

my coding starts like this .....

$w1="Pass";
$result1 = mysql_query("select * from $tableName1
    where result='$w1'");
$result2=mysql_query("select * from $tableName2
    where result ='$w1'");
$num1=mysql_num_rows($result1);
$num2=mysql_num_rows($result2);
while($row1 = mysql_fetch_array($result1)){
     while(($row2 = mysql_fetch_array($result2)){
         if($row1["dbb"] == $row2["dbb"]{
          echo $row1["dbb"];
         }//if
     }//while
 }//while

ie what Iam trying to do is get $result1 & $result2 from 2 different tables where the condition is "Pass".

then from these 2 recordset($result1 & $result2) i need to get the record where field "dbb" has same value.

I hope now u can understand.
if not reply me back
thank u very much
harish

ie , $result1 & $result2 has common field "dbb".

dkjariwala answer looks perfect but if dbb is a unique identifier where only one dbb record of table 1 matches only 1 record of table 2 you can do it all in the query


$Query = "select * from TableName1,TableName2 where TableName1.result = \"Pass\" And TableName2.result = \"Pass\" And Table1.dbb = Table2.dbb";

$result1 = mysql_query($Query);


   while($row = mysql_fetch_array($result1)){
               echo $row["dbb"];
       }


$row will contain all fields for record for both tables.

Yeah, exactly,I was goin to suggest that only.
You can do it using query and that would be best thing to do.

JD

hai JD,

Thank u very much.
It works wonderful.I could get exactly what I require.

but if I wanted it to write to another table (table3) in the same database("db1").ie to write $value1 in table3 under field name field1.
how am I to do?

thankx
harish