</para>
       <para>
        Remainder of <parameter>y</parameter>/<parameter>x</parameter>;
        available for <type>smallint</type>, <type>integer</type>,
        <type>bigint</type>, and <type>numeric</type>
       </para>
       <para>
        <literal>mod(9, 4)</literal>
        <returnvalue>1</returnvalue>
       </para></entry>
      </row>

      <row>
       <entry role="func_table_entry"><para role="func_signature">
        <indexterm>
         <primary>pi</primary>
        </indexterm>
        <function>pi</function> (  )
        <returnvalue>double precision</returnvalue>
       </para>
       <para>
        Approximate value of <phrase role="symbol_font">&pi;</phrase>
       </para>
       <para>
        <literal>pi()</literal>
        <returnvalue>3.141592653589793</returnvalue>
       </para></entry>
      </row>

      <row>
       <entry role="func_table_entry"><para role="func_signature">
        <indexterm>
         <primary>power</primary>
        </indexterm>
        <function>power</function> ( <parameter>a</parameter> <type>numeric</type>,
        <parameter>b</parameter> <type>numeric</type> )
        <returnvalue>numeric</returnvalue>
       </para>
       <para role="func_signature">
        <function>power</function> ( <parameter>a</parameter> <type>double precision</type>,
        <parameter>b</parameter> <type>double precision</type> )
        <returnvalue>double precision</returnvalue>
       </para>
       <para>
        <parameter>a</parameter> raised to the power of <parameter>b</parameter>
       </para>
       <para>
        <literal>power(9, 3)</literal>
        <returnvalue>729</returnvalue>
       </para></entry>
      </row>

      <row>
       <entry role="func_table_entry"><para role="func_signature">
        <indexterm>
         <primary>radians</primary>
        </indexterm>
        <function>radians</function> ( <type>double precision</type> )
        <returnvalue>double precision</returnvalue>
       </para>
       <para>
        Converts degrees to radians
       </para>
       <para>
        <literal>radians(45.0)</literal>
        <returnvalue>0.7853981633974483</returnvalue>
       </para></entry>
      </row>

      <row>
       <entry role="func_table_entry"><para role="func_signature">
        <indexterm>
         <primary>round</primary>
        </indexterm>
        <function>round</function> ( <type>numeric</type> )
        <returnvalue>numeric</returnvalue>
       </para>
       <para role="func_signature">
        <function>round</function> ( <type>double precision</type> )
        <returnvalue>double precision</returnvalue>
       </para>
       <para>
        Rounds to nearest integer.  For <type>numeric</type>, ties are
        broken by rounding away from zero.  For <type>double precision</type>,
        the tie-breaking behavior is platform dependent, but
        <quote>round to nearest even</quote> is the most common rule.
       </para>
       <para>
        <literal>round(42.4)</literal>
        <returnvalue>42</returnvalue>
       </para></entry>
      </row>

      <row>
       <entry role="func_table_entry"><para role="func_signature">
        <function>round</function> ( <parameter>v</parameter> <type>numeric</type>, <parameter>s</parameter> <type>integer</type> )
        <returnvalue>numeric</returnvalue>
       </para>
       <para>
        Rounds <parameter>v</parameter> to <parameter>s</parameter> decimal
        places.  Ties are broken by rounding away from zero.
       </para>
       <para>
        <literal>round(42.4382, 2)</literal>
        <returnvalue>42.44</returnvalue>
       </para>
       <para>
        <literal>round(1234.56, -1)</literal>
        <returnvalue>1230</returnvalue>
       </para></entry>
      </row>

      <row>
       <entry role="func_table_entry"><para role="func_signature">
        <indexterm>
         <primary>scale</primary>
        </indexterm>
        <function>scale</function> ( <type>numeric</type> )
        <returnvalue>integer</returnvalue>