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POmysql result not displaying based on my query
 

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  1. POmysql result not displaying based on my query
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    <p>I have a table called <code>add_project</code>:</p> <pre> +------------+---------+-------------------+--------------+ | project_id | user_id | project_status_id | project_name | +------------+---------+-------------------+--------------+ | 1 | 1 | 3 | abc | | 2 | 1 | 0 | def | | 3 | 1 | 1 | xyz | | 4 | 1 | 3 | lmn | | 5 | 1 | 0 | trs | | 6 | 1 | 3 | ght | +------------+---------+-------------------+--------------+ </pre> <p>Here on this table admin add the new projects. The admin <code>user_id</code> is 1 so it is all common. <code>project_status_id</code> indicates the completion status of that project (0=new, 1=working, 3=completed).</p> <p>And I have another table called <code>asign_project</code>:</p> <pre> +----------+------------+---------+ | asign_id | project_id | user_id | +----------+------------+---------+ | 1 | 1 | 5 | | 2 | 5 | 9 | | 3 | 2 | 5 | | 4 | 4 | 5 | | 5 | 6 | 9 | | 6 | 3 | 9 | +----------+------------+---------+ </pre> <p>Here on this table the admin assigns the project to different users.</p> <p>Now what I want is to find how many completed projects each user has done. As you can see, <code>project_id(1,4)</code> has been completed by <code>user_id=5</code>.</p> <p>So my question is how do I get that value?</p> <p>Below is the query that I have written:</p> <pre class="lang-sql prettyprint-override"><code>SELECT * FROM asign_project, add_project WHERE asign_project.project_id = add_project.project_id AND project_status_id='3' AND user_id='5' </code></pre> <p>But it is showing:</p> <blockquote> <p><code>#1052 - Column 'user_id' in where clause is ambiguous</code></p> </blockquote> <p>See it on <a href="http://sqlfiddle.com/#!2/2f8e3b/1" rel="nofollow">sqlfiddle</a>.</p> <p>Waiting for your reply.</p>
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    1. USeggyal
    1. USfuturing
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      1. VTDownMod
    1. CODo you have the column user_id both in the table asign_project and add_project?
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      1. USsekky
    2. COSince `add_project.user_id` will necessarily always be 1, what is the point in having that column in that table?
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      1. USeggyal
 

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