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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN" "http://www.w3.org/TR/html4/strict.dtd"><html><head><title>Number Of SQL Parameters</title><style type="text/css">body { margin: auto; font-family: "Verdana" "sans-serif"; padding: 8px 1%;}a { color: #45735f }a:visited { color: #734559 }.logo { position:absolute; margin:3px; }.tagline { float:right; text-align:right; font-style:italic; width:240px; margin:12px; margin-top:58px;}.toolbar { font-variant: small-caps; text-align: center; line-height: 1.6em; margin: 0; padding:1px 8px;}.toolbar a { color: white; text-decoration: none; padding: 6px 12px; }.toolbar a:visited { color: white; }.toolbar a:hover { color: #80a796; background: white; }.content { margin: 5%; }.content dt { font-weight:bold; }.content dd { margin-bottom: 25px; margin-left:20%; }.content ul { padding:0px; padding-left: 15px; margin:0px; }/* rounded corners */.se { background: url(../images/se.png) 100% 100% no-repeat #80a796}.sw { background: url(../images/sw.png) 0% 100% no-repeat }.ne { background: url(../images/ne.png) 100% 0% no-repeat }.nw { background: url(../images/nw.png) 0% 0% no-repeat }</style><meta http-equiv="content-type" content="text/html; charset=UTF-8"> </head><body><div><!-- container div to satisfy validator --><a href="../index.html"><img class="logo" src="../images/SQLite.gif" alt="SQLite Logo" border="0"></a><div><!-- IE hack to prevent disappearing logo--></div><div class="tagline">Small. Fast. Reliable.<br>Choose any three.</div><table width=100% style="clear:both"><tr><td> <div class="se"><div class="sw"><div class="ne"><div class="nw"> <div class="toolbar"> <a href="../about.html">About</a> <a href="../sitemap.html">Sitemap</a> <a href="../docs.html">Documentation</a> <a href="../download.html">Download</a> <a href="../copyright.html">License</a> <a href="../news.html">News</a> <a href="http://www.sqlite.org/cvstrac/index">Developers</a> <a href="../support.html">Support</a> </div></div></div></div></div></td></tr></table> <a href="intro.html"><h2>SQLite C Interface</h2></a><h2>Number Of SQL Parameters</h2><blockquote><pre>int sqlite3_bind_parameter_count(sqlite3_stmt*);</pre></blockquote><p>This routine can be used to find the number of SQL parametersin a prepared statement. SQL parameters are tokens of theform "?", "?NNN", ":AAA", "$AAA", or "@AAA" that serve asplace-holders for values that are <a href="../c3ref/bind_blob.html">bound</a>to the parameters at a later time.</p><p>This routine actually returns the index of the largest parameter.For all forms except ?NNN, this will correspond to the number ofunique parameters. If parameters of the ?NNN are used, there maybe gaps in the list.</p><p>See also: <a href="../c3ref/bind_blob.html">sqlite3_bind()</a>,<a href="../c3ref/bind_parameter_name.html">sqlite3_bind_parameter_name()</a>, and<a href="../c3ref/bind_parameter_index.html">sqlite3_bind_parameter_index()</a>.</p><p><h3>Invariants:</h3><table border="0" cellpadding="5" cellspacing="0"><tr><td valign="top">F13601</td> <td valign="top">The <a href="../c3ref/bind_parameter_count.html">sqlite3_bind_parameter_count(S)</a> interface returnsthe largest index of all SQL parameters in the<a href="../c3ref/stmt.html">prepared statement</a> S, or 0 if Scontains no SQL parameters.</td></tr></table></p><p>See also lists of <a href="objlist.html">Objects</a>, <a href="constlist.html">Constants</a>, and <a href="funclist.html">Functions</a>.</p><hr><small><i>This page last modified 2008/05/12 13:08:44 UTC</i></small></div></body></html>⌨️ 快捷键说明
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