How to use Conditional if-else in MYSQl query.

Question

1.00/5 (1 vote)

See more:

I have two tables (1) tblborrowloan contain columns pno, LoanAmt.
(2) tblextraloan contain columns pno, LoanAmt.
I need to select LoanAmt from table 2 according to pno but if it returns null then data should come from table 1 on the basis of same pno.
here is my qury.. but not executing, using Mysql(Ver 5.0) as backend.
Help me out. Thanks in Advance.

ifnull (SELECT LoanAmt FROM tblextraloan where pno = '0706' as L) then (SELECT LoanAmt FROM tblborrowloan where pno = '0706' as L);

Posted 23-Sep-13 0:51am

Member 9822231

Updated 23-Sep-13 2:03am

v2

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)

Thomas ktg · Answer 1 · 2013-09-23T02:58:00

Solution 1

I think the query syntax you have written is not correct as per the MYSQL syntax.

If the first expression is not null it returns the first expression result,else the second one.

the query could be..

SQL

ifnull((SELECT LoanAmt FROM tblextraloan where pno = '0706' as L),(SELECT LoanAmt FROM tblborrowloan where pno = '0706' as L));

for more details refer this below link.
http://dev.mysql.com/doc/refman/5.0/en/control-flow-functions.html#function_ifnull[^]

Posted 23-Sep-13 2:58am

Thomas ktg

Updated 23-Sep-13 19:00pm

v2

Comments

Member 12651508 31-Aug-16 4:59am

hello There I used if condition to filter data accurately but its not work.
I am trying to filter my product like Brand, Price and Fabric.
Its Filter data individual i.e if you Click brand Then its show only Brand.
But we need deep filter

Please help me out Thanks In Advance
23) {
$trimstring = substr($string, 0, 23);
} else {
$trimstring = $string;
}
?>