A general single sql query

Question

I have a table like this:

id | roll_no | name
---------------------
 1 |   111   | Naveed
 2 |   222   | Adil
 3 |   333   | Ali 

If I

Answer 1

Complete solution with the help of accepted answer.

$tableName = "test"; 
$fields = array( "id" , "roll_no" );
$values = array( "1,111", "2,222" );

$fieldsStr = implode(',', $fields);
$valuesStr = implode("','", $values);

// Get all records from remote table
$sql = "SELECT * FROM $tableName WHERE concat_ws(',', $fieldsStr ) NOT IN ( '$valuesStr' )";

Answer 2

select * from dummy where concat_ws (',', id, roll_no) not in ('1,111', '2,222')

Complete solution:

$tableName = "test"; 
$fields = array( "id" , "roll_no" );
$values = array( "1,111", "2,222" );

$fieldsStr = implode(',', $fields);
$valuesStr = implode("','", $values);
$sql = "SELECT * 
    FROM $tableName 
    WHERE concat_ws(',', $fieldsStr ) NOT IN ( '$valuesStr' )";

Answer 3

You will probably always have to explode the Array in PHP and pass the values as a string into the query (sprintf) so you probably can, and should, do all in PHP.

One thing that catches my eye is that you are always using ID's. Are the ID's a unique or primary field? If so just forget about the roll_no as your query will be faster using just ID's.