SQL find a value from a column
<p>i have an easy question, imagine i have in a sql table a column A with values </p>

<pre><code>    A

20.30.40
20.40
10.30
</code></pre>

<p>and so on.</p>

<p>I want to find all rows with just value 30 , how can i do that with a sql query ? its a string data column.
Please some help guys ..</p>