Databases
StackOverflow2013
Postsdbo
POMysql not returning result as expected
 

Note that there are some explanatory texts on larger screens.

plurals
  1. POMysql not returning result as expected
    primarykey
    data
    text
    <p>Can anyone see what is wrong with this sql query.</p> <p>This returns no results, although the same query out put so that vars are calculated and then run in mysql returns 3800+ results</p> <pre><code>$query = "SELECT * FROM twitter_user JOIN twitter_connection ON (twitter_user.tu_id = twitter_connection.tc_tu_id) WHERE tc_followyou = 1 AND tc_twitterapp_user_id = ". $mytwitterid . " LIMIT " . $perpage . " OFFSET " . $twitter_offset; </code></pre> <p>This same query however does work</p> <pre><code>$query = "SELECT * FROM twitter_user JOIN twitter_connection ON (twitter_user.tu_id = twitter_connection.tc_tu_id) WHERE tc_youfollow = 1 AND tc_twitterapp_user_id = ". $mytwitterid . " LIMIT " . $perpage . " OFFSET " . $twitter_offset; </code></pre> <p>The only difference is the use of tc_followyou vs tc_youfollow</p> <p>Both are in the same table, no NULL records, and integer.</p> <p>If I take the exact same piece of php code adn swap tc_followyou for tc_youfollow I get a result.</p> <p>I am not sure why, but this is only a problem if the script is run on an amazon RDS server Mysql v5.5.8-log, another server running mysql 5.1.52</p> <p>works as expected.</p> <p>Why would either the server version or the field name cause this issue?</p> <p>I'm stumped.</p> <p>Thanks Stephen</p> <p><strong>UPDATE :</strong> This is resolved. The issue was that the actual code I was running did not have a limit. I was carelessly running against the database to get a 'total'. This because the failing table had so many records, it did not return a result. I accepted the solution because the person helped me work through a thought process that helped discover the problem.</p>
    singulars
    1. PO
      singulars
      1. PTAnswer
    1. This table or related slice is empty.
    1. PTQuestion
    1. USStephen Baugh
    1. USStephen Baugh
    plurals
    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. PO
      singulars
      1. PTAnswer
    1. This table or related slice is empty.
    1. COPHP and SQL are different languages. Try to debug your SQL queries separately.
      singulars
      1. POMysql not returning result as expected
      1. USÁlvaro González
    2. COThanks Alvaro, I've tried to do that and the query works fine directly in MYSQL. It's the execution through php5 to MYSQL that is not working and I can't for the life of me work out why.
      singulars
      1. POMysql not returning result as expected
      1. USStephen Baugh
    3. COJust in case, please hard-code the complete query inside a single-quoted string. You can also replace `*` with something like `COUNT(*) AS total` to discard other issues.
      singulars
      1. POMysql not returning result as expected
      1. USÁlvaro González
 

Querying!

 
Guidance
A row detail

Detail views are divided into sections. All the information in the data section comes from columns in the selected row. The other sections display data from other, related rows.

Related data can be related in a to-one or a to-many fashion. Captions of data related in a to-many fashion link to a list view showing a filtered view of the table.

Try moving around until you find a non-empty to-many entry and click on the label to get to one. You can move back to the root by clicking on the database name in the header.

SQuiL has stopped working due to an internal error.

If you are curious you may find further information in the browser console, which is accessible through the devtools (F12).

Reload