mysql finding unmatched record

Question

0.00/5 (No votes)

See more:

hi frnds,

im trying to find out unmatched records from 2 tables i had tried below query it works fine but i need to find for multiple column matching plz help

res = mysql_query("SELECT * FROM emp WHERE emp.roll_no NOT IN (SELECT emp_no FROM emp_old)");

similarly i had did as follows..
it has error..

emp has rollno and name

emp_old has emp_no and name

i need to find out for this two columns which are unmatched

res = mysql_query("SELECT * FROM emp WHERE emp.roll_no AND emp.name NOT IN (SELECT emp_no AND name FROM emp_old)");

Posted 22-Jan-14 19:17pm

Arun-23

Add a Solution

1 solution

Add a Solution

Add your solution here

Treat my content as plain text, not as HTML

Preview 0

…

Existing Members

Sign in to your account

...or Join us

Download, Vote, Comment, Publish.

Your Email
Password
Forgot your password?

Your Email
This email is in use. Do you need your password?
Optional Password

I have read and agree to the Terms of Service and Privacy Policy
Please subscribe me to the CodeProject newsletters

When answering a question please:

Read the question carefully.
Understand that English isn't everyone's first language so be lenient of bad spelling and grammar.
If a question is poorly phrased then either ask for clarification, ignore it, or edit the question and fix the problem. Insults are not welcome.
Don't tell someone to read the manual. Chances are they have and don't get it. Provide an answer or move on to the next question.

Let's work to help developers, not make them feel stupid.

This content, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)

skydger · Accepted Answer · 2014-01-22T20:17:00

Solution 1

Hello, try these ones
1.

SQL

SELECT *
  FROM emp
 WHERE NOT EXISTS (SELECT emp_old.roll_no, emp_old.name
                     FROM emp_old
                    WHERE emp_old.roll_no = emp.roll_no AND
                          emp_old.name = emp.name)

2.

SQL

SELECT emp.*
  FROM emp
  LEFT JOIN emp_old
    ON emp_old.roll_no = emp.roll_no AND
       emp_old.name = emp.name
 WHERE emp.name IS NULL

Posted 22-Jan-14 20:17pm

skydger

v2

Comments

Arun-23 23-Jan-14 2:20am

its working its listing out unmatched list of 2 columns emp_no & name i want to highlight this two columns according to result is this possible..

skydger 23-Jan-14 14:00pm

Where do you wish to highlight these columns?

Arun-23 23-Jan-14 23:44pm

in fetched result
while($row=mysql_fetch_array($res))
{
echo "<tr>";
echo "<td align='center' width='200'>" . $row['roll_no'] . "</td>";// which rollno is wrong in red color
echo "<td align='left' width='200'>" . $row['name'] . "</td>";//which name is wrong in blue color
echo "</tr>";
}

echo "</table>";

skydger 24-Jan-14 2:01am

Consider to use for html 4.0 or to use CSS. Please refer following link for details: http://www.w3schools.com/tags/att_font_color.asp