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    <p>From the <a href="http://dev.mysql.com/doc/refman//5.5/en/select.html" rel="nofollow">fine manual</a>:</p> <blockquote> <p><code>DISTINCT</code> specifies removal of duplicate rows from the result set. [...] <code>DISTINCTROW</code> is a synonym for <code>DISTINCT</code>.</p> </blockquote> <p>So saying this:</p> <pre><code>SELECT DISTINCTROW Email, login_id, user_id ... where SecurityAns = securityans </code></pre> <p>just removes duplicates from the result set but if you have multiple rows with the same <code>SecurityAns</code> and they're all <code>securityans</code>, then your query will return multiple rows. If <code>SecurityAns</code> is an answer to a standard question like "what is your favorite color" or "what was your mother's maiden name" then you should be expecting a lot of duplicates so <code>SecurityAns</code> is certainly not sufficient to guarantee uniqueness.</p> <p>You need to add more to the WHERE clause to guarantee unique results. Or, you could add LIMIT 1 but that's just a bandage over the real problem.</p> <p>You're also probably running into a problem with your WHERE clause:</p> <pre><code>where SecurityAns = securityans </code></pre> <p>the should be true for every row in the table because I think the <code>securityans</code> column name will be used rather than the <code>securityans</code> parameter. Try using a different parameter name. For example, I see your duplicate problem with a procedure like this:</p> <pre><code>create procedure p(in id int, out result int) begin select id into result from t where id = id; end </code></pre> <p>but not with this version:</p> <pre><code>create procedure p(in find_id int, out result int) begin select id into result from t where id = find_id; end </code></pre>
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    1. COHello @mu the result which i am fetching is only one in spite of that too the error it is showing the same
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    2. COThe table has only less row,the security question is one and it gives results only 1 row is there any method to avoid duplication.
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    3. CO@user1297878: I think you're also seeing a conflict between the `securityans` column name and the `securityans` parameter name and the column name is winning.
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