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PostgreSQL documentation

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</row>

<row>

<entry><literal>AM</literal> or <literal>A.M.</literal> or

<literal>li</literal> or <literal>P.M.</literal></entry>

<literal>PM</literal> or <literal>P.M.</literal></entry>

<entry>meridian indicator (upper case)</entry>

</row>

<row>

<entry><literal>am</literal> or <literal>a.m.</literal> or

<literal>li</literal> or <literal>p.m.</literal></entry>

<literal>pm</literal> or <literal>p.m.</literal></entry>

<entry>meridian indicator (lower case)</entry>

</row>

<row>

</row>

<row>

<entry><literal>BC</literal> or <literal>B.C.</literal> or

<literal>li</literal> or <literal>A.D.</literal></entry>

<literal>AD</literal> or <literal>A.D.</literal></entry>

<entry>era indicator (upper case)</entry>

</row>

<row>

<entry><literal>bc</literal> or <literal>b.c.</literal> or

<literal>li</literal> or <literal>a.d.</literal></entry>

<literal>ad</literal> or <literal>a.d.</literal></entry>

<entry>era indicator (lower case)</entry>

</row>

<row>

<bridgehead renderas="sect2">COALESCE</bridgehead>

<synopsis>

<function>COALESCE</function>(<replaceable>value</replaceable><optional

>, ...</optional>)

<function>COALESCE</function>(<replaceable>value</replaceable>

<optional>, ...</optional>)

</synopsis>

<para>