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<title>ADDWHEN and DELETEWHEN expression operators</title>
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<h4 id="rzahqoperator">ADDWHEN and DELETEWHEN expression operators</h4>
<p>You can use these operators for expressions:</p>
<a name="wq499"></a>
<table id="wq499" width="100%" summary="" border="1" frame="border" rules="all" class="singleborder">
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<tr class="tablemainheaderbar">
<th id="wq500" width="11%" align="left" valign="bottom">Operator</th>
<th id="wq501" width="88%" align="left" valign="bottom">Description</th>
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<td align="center" valign="top" headers="wq500">==</td>
<td align="left" valign="top" headers="wq501">Returns TRUE if operands are equivalent,
FALSE if they are not.</td>
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<tr>
<td align="center" valign="top" headers="wq500">!=</td>
<td align="left" valign="top" headers="wq501">Returns FALSE if operands are equivalent,
TRUE if they are not.</td>
</tr>
<tr>
<td align="center" valign="top" headers="wq500">></td>
<td align="left" valign="top" headers="wq501">Returns TRUE if the operand on the left is
greater than the operand on the right, FALSE if it is not. If the operands
are strings, the ASCII values are compared.</td>
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<tr>
<td align="center" valign="top" headers="wq500"><span class="bold"> &lt;</span></td>
<td align="left" valign="top" headers="wq501">Returns TRUE if the operand on the left
is less than the operand on the right, FALSE if it is not. If the operands
are strings, the ASCII values are compared.</td>
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<td align="center" valign="top" headers="wq500">>=</td>
<td align="left" valign="top" headers="wq501">Returns TRUE if the operand on the left
is greater than or equal to the operand on the right, FALSE if it is not.
If the operands are strings, the ASCII values are compared.</td>
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<tr>
<td align="center" valign="top" headers="wq500"><span class="bold"> &lt;=</span></td>
<td align="left" valign="top" headers="wq501">Returns TRUE if the operand on the left
is less than or equal to the operand on the right, FALSE if it is not. If
the operands are strings, the ASCII values are compared.</td>
</tr>
<tr>
<td align="center" valign="top" headers="wq500"><span class="bold"> &amp;&amp;</span></td>
<td align="left" valign="top" headers="wq501">Logical AND. Returns TRUE if both operands
have a value other than 0. Operands must be integers.</td>
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<td align="center" valign="top" headers="wq500"><span class="bold">||</span></td>
<td align="left" valign="top" headers="wq501">Logical OR. Returns TRUE if either operand
has a value other than 0. Operands must be integers.</td>
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<td align="center" valign="top" headers="wq500"><span class="bold">+</span></td>
<td align="left" valign="top" headers="wq501">If the operands are both integers, the result
is the sum of the integers. If the operands are both strings, the result
is the concatenation of the two strings.</td>
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<td align="center" valign="top" headers="wq500"><span class="bold">-</span></td>
<td align="left" valign="top" headers="wq501">Subtracts integers.</td>
</tr>
<tr>
<td align="center" valign="top" headers="wq500"><span class="bold">*</span></td>
<td align="left" valign="top" headers="wq501">Multiplies integers.</td>
</tr>
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<td align="center" valign="top" headers="wq500"><span class="bold">/</span></td>
<td align="left" valign="top" headers="wq501">Divides integers.</td>
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<td align="center" valign="top" headers="wq500"><span class="bold">()</span></td>
<td align="left" valign="top" headers="wq501"> Parentheses force an evaluation order.</td>
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<td align="center" valign="top" headers="wq500">!</td>
<td align="left" valign="top" headers="wq501">Logical NOT. Returns TRUE if the value of
a single operand is 0. Returns FALSE if it is not 0.</td>
</tr>
<tr>
<td align="center" valign="top" headers="wq500"> ALWAYS</td>
<td align="left" valign="top" headers="wq501">Always returns TRUE.</td>
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<td align="center" valign="top" headers="wq500">NEVER</td>
<td align="left" valign="top" headers="wq501">Always returns FALSE.</td>
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