Solved

if $new_input is empty do not update

Posted on 2013-01-18
4
228 Views
Last Modified: 2013-01-20
using php to update $new_input to varchar column

if $new_input is empty do not update


this has to be writen in mysql not php
0
Comment
Question by:rgb192
  • 2
4 Comments
 
LVL 27

Assisted Solution

by:Lukasz Chmielewski
Lukasz Chmielewski earned 200 total points
ID: 38794136
This would require a conditional statement and this function,
http://dev.mysql.com/doc/refman/5.1/en/string-functions.html#function_length

Wouldn't that be easier if you'd check the variable from php ?
0
 

Author Comment

by:rgb192
ID: 38794334
I understand length
SELECT LENGTH('text');
http://dev.mysql.com/doc/refman/5.1/en/string-functions.html#function_length


but do not understand how to do conditional statement


the if in php would be too complex
I would rather do in mysql so I can test in query editor
0
 
LVL 2

Accepted Solution

by:
EndreCz earned 300 total points
ID: 38796374
You need something like this:

UPDATE table SET column='$new_input' WHERE LENGTH('$new_input')>0
0
 

Author Closing Comment

by:rgb192
ID: 38799841
the former introduced length and the latter applied length and a conditional statement to a sample query. Thank you.
0

Featured Post

PRTG Network Monitor: Intuitive Network Monitoring

Network Monitoring is essential to ensure that computer systems and network devices are running. Use PRTG to monitor LANs, servers, websites, applications and devices, bandwidth, virtual environments, remote systems, IoT, and many more. PRTG is easy to set up & use.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Suggested Solutions

Introduction In this article, I will by showing a nice little trick for MySQL similar to that of my previous EE Article for SQLite (http://www.sqlite.org/), A SQLite Tidbit: Quick Numbers Table Generation (http://www.experts-exchange.com/A_3570.htm…
All XML, All the Time; More Fun MySQL Tidbits – Dynamically Generate XML via Stored Procedure in MySQL Extensible Markup Language (XML) and database systems, a marriage we are seeing more and more of.  So the topics of parsing and manipulating XM…
This Micro Tutorial hows how you can integrate  Mac OSX to a Windows Active Directory Domain. Apple has made it easy to allow users to bind their macs to a windows domain with relative ease. The following video show how to bind OSX Mavericks to …
This tutorial gives a high-level tour of the interface of Marketo (a marketing automation tool to help businesses track and engage prospective customers and drive them to purchase). You will see the main areas including Marketing Activities, Design …

910 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question

Need Help in Real-Time?

Connect with top rated Experts

20 Experts available now in Live!

Get 1:1 Help Now