137 lines
9.6 KiB
HTML
137 lines
9.6 KiB
HTML
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PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
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<meta name="DC.Title" content="Work with triggers and constraints" />
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<meta name="abstract" content="Triggers and constraints can be used to manipulate and manage data in your database tables. These links describe different methods for adding and using triggers and constraints." />
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<meta name="description" content="Triggers and constraints can be used to manipulate and manage data in your database tables. These links describe different methods for adding and using triggers and constraints." />
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<title>Work with triggers and constraints</title>
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<body id="rzahftrigcontable"><a name="rzahftrigcontable"><!-- --></a>
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<!-- Java sync-link --><script language="Javascript" src="../rzahg/synch.js" type="text/javascript"></script>
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<h1 class="topictitle1">Work with triggers and constraints</h1>
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<div><p>Triggers and constraints can be used to manipulate and manage data
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in your database tables. These links describe different methods for adding
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and using triggers and constraints.</p>
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<p>A trigger is a type of stored procedure program that is automatically called
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whenever a specified action is performed on a specific table. Triggers are
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useful for keeping audit trails, for detecting exceptional conditions, for
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maintaining relationships in the database, and for running applications and
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operations that coincide with the change operation.</p>
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<p>Constraints are restrictions or limitations that you place on your database.
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Constraints are implemented at the table level. You can use constraints to
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create referential integrity in your database.</p>
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<p>You can work with triggers and constraints using <span class="keyword">iSeries™</span> Navigator,
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SQL, or the traditional file interface. The following table shows the available
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options for each task. Click the appropriate “X” for more information about
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performing the task.</p>
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<p>The <span class="keyword">iSeries</span> Navigator tasks
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are also documented in the Online help. For more information about accessing <span class="keyword">iSeries</span> Navigator objects and using
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Online help, see <a href="../rzatc/rzatccreateobj.htm"><span class="keyword">iSeries</span> Navigator database tasks</a>.</p>
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<div class="p">
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<div class="tablenoborder"><table cellpadding="4" cellspacing="0" summary="" width="100%" frame="border" border="1" rules="all"><thead align="left"><tr><th align="left" valign="top" width="25%" id="d0e51">Task</th>
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<th align="center" valign="top" width="25%" id="d0e53"><span class="keyword">iSeries</span> Navigator</th>
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<th align="center" valign="top" width="25%" id="d0e58">SQL</th>
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<th align="center" valign="top" width="25%" id="d0e60">Traditional file interface</th>
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</tr>
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</thead>
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<tbody><tr><td valign="top" width="25%" headers="d0e51 ">Write an external trigger program</td>
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<td align="center" valign="top" width="25%" headers="d0e53 "><a href="../dbp/rbaforzahftrn.htm">X</a></td>
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<td align="center" valign="top" width="25%" headers="d0e58 "> </td>
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<td align="center" valign="top" width="25%" headers="d0e60 "><a href="../cl/addpftrg.htm">X</a></td>
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</tr>
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<tr><td valign="top" width="25%" headers="d0e51 ">Add an external trigger</td>
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<td align="center" valign="top" width="25%" headers="d0e53 "><a href="../rzatc/rzatccreateobj.htm">X</a></td>
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<td align="center" valign="top" width="25%" headers="d0e58 "> </td>
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<td align="center" valign="top" width="25%" headers="d0e60 "><a href="../dbp/rbaforzahftrb.htm">X</a></td>
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</tr>
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<tr><td valign="top" width="25%" headers="d0e51 ">Add an SQL trigger</td>
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<td align="center" valign="top" width="25%" headers="d0e53 "><a href="../rzatc/rzatccreateobj.htm">X</a></td>
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<td align="center" valign="top" width="25%" headers="d0e58 "><a href="../sqlp/rbafydb2triggers.htm">X</a></td>
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<td align="center" valign="top" width="25%" headers="d0e60 "> </td>
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</tr>
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<tr><td valign="top" width="25%" headers="d0e51 ">Write an SQL trigger program</td>
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<td align="center" valign="top" width="25%" headers="d0e53 "><a href="../dbp/rbaforzahftrb.htm">X</a></td>
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<td align="center" valign="top" width="25%" headers="d0e58 "><a href="../sqlp/rbafysqltrig.htm">X</a></td>
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<td align="center" valign="top" width="25%" headers="d0e60 "> </td>
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</tr>
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<tr><td valign="top" width="25%" headers="d0e51 ">Enable and disable a trigger</td>
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<td align="center" valign="top" width="25%" headers="d0e53 "><a href="../rzatc/rzatccreateobj.htm">X</a></td>
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<td valign="top" width="25%" headers="d0e58 "> </td>
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<td align="center" valign="top" width="25%" headers="d0e60 "><a href="../dbp/rbaforzahftrv.htm">X</a></td>
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</tr>
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<tr><td valign="top" width="25%" headers="d0e51 ">Remove a trigger</td>
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<td align="center" valign="top" width="25%" headers="d0e53 "><a href="../rzatc/rzatccreateobj.htm">X</a></td>
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<td align="center" valign="top" width="25%" headers="d0e58 "><a href="../db2/rbafzmstdropst.htm">X</a></td>
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<td align="center" valign="top" width="25%" headers="d0e60 "><a href="../dbp/rbaforzahftrp.htm">X</a></td>
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</tr>
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<tr><td valign="top" width="25%" headers="d0e51 ">Create a key constraint</td>
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<td align="center" valign="top" width="25%" headers="d0e53 "><a href="../rzatc/rzatccreateobj.htm">X</a></td>
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<td align="center" valign="top" width="25%" headers="d0e58 "><a href="../sqlp/rbafyconstex.htm">X</a></td>
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<td align="center" valign="top" width="25%" headers="d0e60 "><a href="../dbp/rbaforzahfcod.htm">X</a></td>
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</tr>
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<tr><td valign="top" width="25%" headers="d0e51 ">Remove a key constraint</td>
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<td align="center" valign="top" width="25%" headers="d0e53 "><a href="../rzatc/rzatccreateobj.htm">X</a></td>
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<td align="center" valign="top" width="25%" headers="d0e58 "><a href="../sqlp/rbafyaddconstraints.htm">X</a></td>
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<td align="center" valign="top" width="25%" headers="d0e60 "><a href="../dbp/rbaforzahfcof.htm">X</a></td>
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</tr>
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<tr><td valign="top" width="25%" headers="d0e51 ">Create a referential constraint</td>
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<td align="center" valign="top" width="25%" headers="d0e53 "><a href="../rzatc/rzatccreateobj.htm">X</a></td>
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<td align="center" valign="top" width="25%" headers="d0e58 "><a href="../sqlp/rbafyaddor.htm">X</a></td>
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<td align="center" valign="top" width="25%" headers="d0e60 "><a href="../dbp/rbaforzahfrce.htm">X</a></td>
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</tr>
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<tr><td valign="top" width="25%" headers="d0e51 ">Enable and disable a referential constraint</td>
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<td align="center" valign="top" width="25%" headers="d0e53 "><a href="../rzatc/rzatccreateobj.htm">X</a></td>
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<td align="center" valign="top" width="25%" headers="d0e58 "> </td>
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<td align="center" valign="top" width="25%" headers="d0e60 "><a href="../dbp/rbaforzahfrcy.htm">X</a></td>
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</tr>
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<tr><td valign="top" width="25%" headers="d0e51 ">Remove a referential constraint</td>
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<td align="center" valign="top" width="25%" headers="d0e53 "><a href="../rzatc/rzatccreateobj.htm">X</a></td>
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<td align="center" valign="top" width="25%" headers="d0e58 "><a href="../sqlp/rbafyaddor.htm">X</a></td>
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<td align="center" valign="top" width="25%" headers="d0e60 "><a href="../dbp/rbaforzahfrc0.htm">X</a></td>
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</tr>
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<tr><td valign="top" width="25%" headers="d0e51 ">Create a check constraint</td>
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<td align="center" valign="top" width="25%" headers="d0e53 "><a href="../rzatc/rzatccreateobj.htm">X</a></td>
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<td align="center" valign="top" width="25%" headers="d0e58 "><a href="../sqlp/rbafycheckcon.htm">X</a></td>
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<td align="center" valign="top" width="25%" headers="d0e60 "><a href="../dbp/rbaforzahfcod.htm">X</a></td>
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</tr>
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<tr><td valign="top" width="25%" headers="d0e51 ">Remove a check constraint</td>
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<td align="center" valign="top" width="25%" headers="d0e53 "><a href="../rzatc/rzatccreateobj.htm">X</a></td>
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<td align="center" valign="top" width="25%" headers="d0e58 "><a href="../sqlp/rbafycheckcon.htm">X</a></td>
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<td align="center" valign="top" width="25%" headers="d0e60 "><a href="../dbp/rbaforzahfcof.htm">X</a></td>
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</tr>
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<tr><td valign="top" width="25%" headers="d0e51 ">Manage check pending constraints</td>
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<td align="center" valign="top" width="25%" headers="d0e53 "><a href="../rzatc/rzatccheckpend.htm">X</a></td>
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<td align="center" valign="top" width="25%" headers="d0e58 "> </td>
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<td align="center" valign="top" width="25%" headers="d0e60 "> </td>
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</tr>
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</tbody>
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</table>
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</div>
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</div>
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</div>
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<div>
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<div class="familylinks">
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<div class="parentlink"><strong>Parent topic:</strong> <a href="rzahfdbadmin.htm" title="See several topics that can help you to manage your database.">Database administration</a></div>
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</div>
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</div>
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</body>
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</html> |