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<TITLE>DELETE(SQL) manual page</TITLE>
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<A HREF="sql.html">SQL Reference Contents</A>
<H2><A NAME="sect0" HREF="#toc0">NAME </A></H2>
delete - delete instances from a class
<H2><A NAME="sect1" HREF="#toc1">SYNOPSIS </A></H2>
<B>delete </B> <B>from </B> class_name
[ <B>where </B> qual ] <BR>
<H2><A NAME="sect2" HREF="#toc2">DESCRIPTION </A></H2>
<B>Delete</B> removes instances which satisfy the
qualification, <I>qual</I> from the specified class. If the qualification is absent,
the effect is to delete all instances in the class. The result is a valid,
but empty class. <P>
You must have write access to the class in order to modify
it, as well as read access to any class whose values are read in the qualification
(see <I>change <A HREF="acl.l.html">acl</I>(l)</A>
.
<H2><A NAME="sect3" HREF="#toc3">EXAMPLE </A></H2>
-- <BR>
--Remove all employees who make over $30,000
<BR>
-- <BR>
delete from emp where emp.sal > 30000 <BR>
-- <BR>
--Clear the hobbies class <BR>
-- <BR>
delete
from hobbies <BR>
<H2><A NAME="sect4" HREF="#toc4">SEE ALSO </A></H2>
<A HREF="drop.l.html">drop(l)</A>
. <P>
<HR><P>
<A NAME="toc"><B>Table of Contents</B></A><P>
<UL>
<LI><A NAME="toc0" HREF="#sect0">NAME</A></LI>
<LI><A NAME="toc1" HREF="#sect1">SYNOPSIS</A></LI>
<LI><A NAME="toc2" HREF="#sect2">DESCRIPTION</A></LI>
<LI><A NAME="toc3" HREF="#sect3">EXAMPLE</A></LI>
<LI><A NAME="toc4" HREF="#sect4">SEE ALSO</A></LI>
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