Go Premium for a chance to win a PS4. Enter to Win

x
?
Solved

MySQL:  WHERE field only contains letters, numbers, single spaces and no leading/trailing space

Posted on 2014-11-25
8
Medium Priority
?
261 Views
Last Modified: 2014-12-07
Hi All,

As the title suggests, I am looking to create a SELECT query that has a WHERE clause to display only companies that only contains letters, numbers, single spaces and no leading/trailing space


SELECT * FROM MyTable WHERE company  NOT LIKE '%  %' etc...


Many thanks
D
0
Comment
Question by:detox1978
  • 5
  • 2
8 Comments
 
LVL 52

Expert Comment

by:Vitor Montalvão
ID: 40464185
No leading spaces:
SELECT * FROM MyTable WHERE company  NOT LIKE '  %'

Open in new window

0
 
LVL 2

Author Comment

by:detox1978
ID: 40464202
Any thoughts on the only letters and numbers?

Obviously, No Trailing spaces would be.
SELECT * FROM MyTable WHERE company  NOT LIKE '% '

Open in new window


Also, I need it to be a single query
0
 
LVL 2

Author Comment

by:detox1978
ID: 40464229
I found this online.

SELECT * FROM MyTable WHERE Company REGEXP '^[A-Za-z0-9]+$'

So I need to add the single space and no leading/trailing space to it
0
What does it mean to be "Always On"?

Is your cloud always on? With an Always On cloud you won't have to worry about downtime for maintenance or software application code updates, ensuring that your bottom line isn't affected.

 
LVL 2

Accepted Solution

by:
detox1978 earned 0 total points
ID: 40464234
I suspect this is close

SELECT * FROM table WHERE column REGEXP '^[A-Za-z0-9 ]+$'

Open in new window

0
 
LVL 111

Expert Comment

by:Ray Paseur
ID: 40464278
Regular expression engines differ a little from each other; I think you're headed in the right direction with that pattern.  I would try what you have both with and without the plus sign.  Be aware that it will match a single blank, or multiple blanks, too.  You may want to do a "down-select" into a temporary table so you can use more than one REGEX to filter the data.
0
 
LVL 2

Author Comment

by:detox1978
ID: 40464291
HI Ray,

I found that on the web, I dont really understand it.
0
 
LVL 52

Expert Comment

by:Vitor Montalvão
ID: 40464305
detox, you are almost there but that solution miss the leading spaces. For that I added the following:
SELECT * FROM table WHERE column REGEXP '^[A-Za-z0-9]+$' AND LEFT(column, 1)<>' '

Open in new window


RegExp --> Regular Expression - are the valid expressions that you want to find in a string. You can also NEGATE and then means that you don't want the strings with the presented expressions (NOT REGEXP).
0
 
LVL 2

Author Closing Comment

by:detox1978
ID: 40485347
Regex I found is the closest.
0

Featured Post

Independent Software Vendors: We Want Your Opinion

We value your feedback.

Take our survey and automatically be enter to win anyone of the following:
Yeti Cooler, Amazon eGift Card, and Movie eGift Card!

Question has a verified solution.

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

An alternative to the "For XML" way of pivoting and concatenating result sets into strings, and an easy introduction to "common table expressions" (CTEs). Being someone who is always looking for alternatives to "work your data", I came across this …
It’s a season to be thankful, and we’re thankful for users like you who engage on site, solve technology problems, and network with others in the industry. What tech are we most thankful for? Keep reading.
Explain concepts important to validation of email addresses with regular expressions. Applies to most languages/tools that uses regular expressions. Consider email address RFCs: Look at HTML5 form input element (with type=email) regex pattern: T…
This tutorial will teach you the core code needed to finalize the addition of a watermark to your image. The viewer will use a small PHP class to learn and create a watermark.
Suggested Courses

971 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