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    <p>Initially you have to <code>UPDATE</code> all the current record with their contains value:</p> <pre><code>UPDATE UserEntry SET contains = CASE WHEN screen_name LIKE CONCAT('%', name ,'%') OR description LIKE CONCAT('%', name ,'%') THEN True ELSE False END </code></pre> <p><a href="http://sqlfiddle.com/#!2/99fbd/1/0" rel="nofollow">Demo on SQLFiddle</a></p> <p>Then to maintain the integrity of the <code>contain</code> values whenever new records are inserted or existing records are updated you will need to use <code>TRIGGER</code>s:</p> <pre><code>CREATE TRIGGER TRG_UserEntry_BeforeInsert BEFORE INSERT ON UserEntry FOR EACH ROW SET new.contains = CASE WHEN new.screen_name LIKE CONCAT('%', new.name ,'%') OR new.description LIKE CONCAT('%', new.name ,'%') THEN True ELSE False END; </code></pre> <p>And you'll need an identical one for <code>BEFORE UPDATE</code> too. </p> <p>See a <a href="http://sqlfiddle.com/#!2/1664b/1/0" rel="nofollow">working demo on SQLFiddle</a>, note that I do an <code>UPDATE</code> on the last row which is why it shows <code>contains = 1</code> too.</p> <p>Since you are using SQLite you can't use <code>CONCAT()</code> so instead use <code>'%'||new.name||'%'</code>. And since your <code>contains</code> column is of type <code>text</code> you need to use quoted strings for the <code>True</code> and <code>False</code> values e.g.</p> <pre><code>CASE WHEN new.screen_name LIKE '%'||new.name||'%' OR new.description LIKE '%'||new.name||'%' THEN "Y" ELSE "N" END; </code></pre>
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    1. COWOW!! thanks so much for this, I am not very good at SQL and Python, but I do not think trigger will do it, since the table is already populated with everything except the "Contain" column. I need to populate the "Contain" column based on the values in description & screen_name (if they contain the name), and "contain" has to be true/false. We do not populate "Contain" on the update. I hope I am making sense.
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    2. COAnswer updated, you should still create the triggers after the initial `UPDATE`, otherwise whenever data in the table changes you will manually have to `UPDATE` all the `contains` values.
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    3. COThanks so much. I will try to use this code. In my case the "Contain" field is text, instead of Boolean, so syntactically am I just supposed to put quotes around "True" and "False" or should there be an equal sign as well. Thanks so much for your help once again.
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