1<?xml version="1.0" encoding="UTF-8" standalone="no"?> 2<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> 3<html xmlns="http://www.w3.org/1999/xhtml"> 4 <head> 5 <meta http-equiv="Content-Type" content="text/html; charset=UTF-8" /> 6 <title>db count</title> 7 <link rel="stylesheet" href="apiReference.css" type="text/css" /> 8 <meta name="generator" content="DocBook XSL Stylesheets V1.73.2" /> 9 <link rel="start" href="index.html" title="Berkeley DB TCL API Reference" /> 10 <link rel="up" href="tclapi.html" title="Chapter��1.�� Berkeley DB Tcl APIs" /> 11 <link rel="prev" href="db_close.html" title="db close" /> 12 <link rel="next" href="db_cursor.html" title="db cursor" /> 13 </head> 14 <body> 15 <div class="navheader"> 16 <table width="100%" summary="Navigation header"> 17 <tr> 18 <th colspan="3" align="center"><span class="emphasis"><em>db</em></span> count</th> 19 </tr> 20 <tr> 21 <td width="20%" align="left"><a accesskey="p" href="db_close.html">Prev</a>��</td> 22 <th width="60%" align="center">Chapter��1.�� 23 Berkeley DB Tcl APIs 24 </th> 25 <td width="20%" align="right">��<a accesskey="n" href="db_cursor.html">Next</a></td> 26 </tr> 27 </table> 28 <hr /> 29 </div> 30 <div class="sect1" lang="en" xml:lang="en"> 31 <div class="titlepage"> 32 <div> 33 <div> 34 <h2 class="title" style="clear: both"><a id="db_count"></a><span class="emphasis"><em>db</em></span> count</h2> 35 </div> 36 </div> 37 </div> 38 <pre class="programlisting">db count key </pre> 39 <p> 40 The <span class="emphasis"><em>db</em></span> <span class="bold"><strong>count</strong></span> 41 command returns a count of the number of duplicate data items for the 42 key given. If the key does not exist, a value of 0 is returned. If 43 there are no duplicates, or if the database does not support 44 duplicates, but a key/data pair exists, a value of 1 is returned. If 45 an error occurs, a Berkeley DB error message is returned or a Tcl 46 error is thrown. 47 </p> 48 </div> 49 <div class="navfooter"> 50 <hr /> 51 <table width="100%" summary="Navigation footer"> 52 <tr> 53 <td width="40%" align="left"><a accesskey="p" href="db_close.html">Prev</a>��</td> 54 <td width="20%" align="center"> 55 <a accesskey="u" href="tclapi.html">Up</a> 56 </td> 57 <td width="40%" align="right">��<a accesskey="n" href="db_cursor.html">Next</a></td> 58 </tr> 59 <tr> 60 <td width="40%" align="left" valign="top"><span class="emphasis"><em>db</em></span> close��</td> 61 <td width="20%" align="center"> 62 <a accesskey="h" href="index.html">Home</a> 63 </td> 64 <td width="40%" align="right" valign="top">��<span class="emphasis"><em>db</em></span> cursor</td> 65 </tr> 66 </table> 67 </div> 68 </body> 69</html> 70