Syntax:
<div class='sql'>
<pre>
WHERE <i>where_condition</i>
</pre>
</div>
<ul>
<li \> The WHERE clause, if given, indicates the condition or conditions that the records must satisfy to be selected.
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<li \> <i>where_condition</i> is an expression that evaluates to true for each row to be selected. 
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<li \> The statement selects all rows if there is no WHERE clause.
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<li \> When narrowing results with aggregate function values HAVING clause should be used instead of WHERE clause
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