201 lines
9.2 KiB
HTML
201 lines
9.2 KiB
HTML
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<!DOCTYPE html>
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<html><head>
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<meta name="viewport" content="width=device-width, initial-scale=1.0">
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<meta http-equiv="content-type" content="text/html; charset=UTF-8">
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<link href="sqlite.css" rel="stylesheet">
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<title>DROP TABLE</title>
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<!-- path= -->
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</head>
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<body>
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<div class=nosearch>
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<a href="index.html">
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<img class="logo" src="images/sqlite370_banner.gif" alt="SQLite" border="0">
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</a>
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<div class="tagline desktoponly">
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Small. Fast. Reliable.<br>Choose any three.
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</div>
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<div class="menu mainmenu">
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<ul>
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<li><a href="index.html">Home</a>
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<li class='mobileonly'><a href="javascript:void(0)" onclick='toggle_div("submenu")'>Menu</a>
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<li class='desktoponly'><a href="docs.html">Documentation</a>
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<a href="javascript:void(0)" onclick='toggle_search()'>Search</a>
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<ul>
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<li><a href='about.html'>About</a>
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<li><a href='docs.html'>Documentation</a>
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<li><a href='download.html'>Download</a>
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<li><a href='support.html'>Support</a>
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<li><a href='prosupport.html'>Purchase</a>
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</ul>
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<div class="searchmenu" id="searchmenu">
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<input type="submit" value="Go">
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</form>
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<script>
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function toggle_div(nm) {
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w.style.display = "block";
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document.getElementById("searchbox").focus()
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}
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function div_off(nm){document.getElementById(nm).style.display="none";}
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window.onbeforeunload = function(e){div_off("submenu");}
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/* Disable the Search feature if we are not operating from CGI, since */
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if( !location.origin || !location.origin.match || !location.origin.match(/http/) ){
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document.getElementById("search_menubutton").style.display = "none";
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}
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/* Used by the Hide/Show button beside syntax diagrams, to toggle the */
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function hideorshow(btn,obj){
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var x = document.getElementById(obj);
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b.innerHTML='show';
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}else{
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x.style.display = '';
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b.innerHTML='hide';
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}
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return false;
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}
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var antiRobot = 0;
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function antiRobotGo(){
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if( antiRobot!=3 ) return;
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antiRobot = 7;
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var j = document.getElementById("mtimelink");
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if(j && j.hasAttribute("data-href")) j.href=j.getAttribute("data-href");
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}
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function antiRobotDefense(){
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document.body.onmousedown=function(){
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antiRobot |= 2;
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antiRobotGo();
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document.body.onmousedown=null;
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}
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document.body.onmousemove=function(){
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antiRobot |= 2;
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antiRobotGo();
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document.body.onmousemove=null;
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}
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setTimeout(function(){
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antiRobot |= 1;
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antiRobotGo();
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}, 100)
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antiRobotGo();
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}
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antiRobotDefense();
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</script>
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<div class=fancy>
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<div class=nosearch>
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<div class="fancy_title">
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DROP TABLE
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</div>
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</div>
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<p><b><a href="syntax/drop-table-stmt.html">drop-table-stmt:</a></b>
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<button id='xa474c09d' onclick='hideorshow("xa474c09d","xbbb7e16d")'>hide</button></p>
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<div id='xbbb7e16d' class='imgcontainer'>
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<div style="max-width:758px"><svg xmlns='http://www.w3.org/2000/svg' class="pikchr" viewBox="0 0 758.16 54">
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<circle cx="5" cy="17" r="3.6" style="fill:none;stroke-width:2.16;stroke:rgb(0,0,0);" />
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<polygon points="32,17 20,21 20,12" style="fill:rgb(0,0,0)"/>
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<path d="M9,17L26,17" style="fill:none;stroke-width:2.16;stroke:rgb(0,0,0);" />
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<path d="M47,32L78,32A15 15 0 0 0 93 17A15 15 0 0 0 78 2L47,2A15 15 0 0 0 32 17A15 15 0 0 0 47 32Z" style="fill:none;stroke-width:2.16;stroke:rgb(0,0,0);" />
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<text x="63" y="17" text-anchor="middle" fill="rgb(0,0,0)" dominant-baseline="central">DROP</text>
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<polygon points="116,17 105,21 105,12" style="fill:rgb(0,0,0)"/>
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<path d="M93,17L110,17" style="fill:none;stroke-width:2.16;stroke:rgb(0,0,0);" />
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<path d="M131,32L171,32A15 15 0 0 0 186 17A15 15 0 0 0 171 2L131,2A15 15 0 0 0 116 17A15 15 0 0 0 131 32Z" style="fill:none;stroke-width:2.16;stroke:rgb(0,0,0);" />
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<text x="151" y="17" text-anchor="middle" fill="rgb(0,0,0)" dominant-baseline="central">TABLE</text>
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<polygon points="222,17 210,21 210,12" style="fill:rgb(0,0,0)"/>
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<path d="M186,17L216,17" style="fill:none;stroke-width:2.16;stroke:rgb(0,0,0);" />
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<path d="M237,32A15 15 0 0 0 252 17A15 15 0 0 0 237 2A15 15 0 0 0 222 17A15 15 0 0 0 237 32Z" style="fill:none;stroke-width:2.16;stroke:rgb(0,0,0);" />
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<text x="237" y="17" text-anchor="middle" fill="rgb(0,0,0)" dominant-baseline="central">IF</text>
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<polygon points="275,17 264,21 264,12" style="fill:rgb(0,0,0)"/>
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<path d="M252,17L269,17" style="fill:none;stroke-width:2.16;stroke:rgb(0,0,0);" />
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<path d="M290,32L335,32A15 15 0 0 0 350 17A15 15 0 0 0 335 2L290,2A15 15 0 0 0 275 17A15 15 0 0 0 290 32Z" style="fill:none;stroke-width:2.16;stroke:rgb(0,0,0);" />
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<text x="313" y="17" text-anchor="middle" fill="rgb(0,0,0)" dominant-baseline="central">EXISTS</text>
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<polygon points="404,17 392,21 392,12" style="fill:rgb(0,0,0)"/>
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<path d="M350,17L398,17" style="fill:none;stroke-width:2.16;stroke:rgb(0,0,0);" />
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<path d="M419,32L515,32A15 15 0 0 0 531 17A15 15 0 0 0 515 2L419,2A15 15 0 0 0 404 17A15 15 0 0 0 419 32Z" style="fill:none;stroke-width:2.16;stroke:rgb(0,0,0);" />
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<text x="467" y="17" text-anchor="middle" fill="rgb(0,0,0)" dominant-baseline="central">schema-name</text>
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<polygon points="554,17 542,21 542,12" style="fill:rgb(0,0,0)"/>
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<path d="M531,17L548,17" style="fill:none;stroke-width:2.16;stroke:rgb(0,0,0);" />
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<path d="M569,32A15 15 0 0 0 584 17A15 15 0 0 0 569 2A15 15 0 0 0 554 17A15 15 0 0 0 569 32Z" style="fill:none;stroke-width:2.16;stroke:rgb(0,0,0);" />
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<text x="569" y="17" text-anchor="middle" font-weight="bold" fill="rgb(0,0,0)" dominant-baseline="central">.</text>
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<polygon points="620,17 608,21 608,12" style="fill:rgb(0,0,0)"/>
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<path d="M584,17L614,17" style="fill:none;stroke-width:2.16;stroke:rgb(0,0,0);" />
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<path d="M635,32L710,32A15 15 0 0 0 725 17A15 15 0 0 0 710 2L635,2A15 15 0 0 0 620 17A15 15 0 0 0 635 32Z" style="fill:none;stroke-width:2.16;stroke:rgb(0,0,0);" />
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<text x="673" y="17" text-anchor="middle" fill="rgb(0,0,0)" dominant-baseline="central">table-name</text>
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<polygon points="748,17 737,21 737,12" style="fill:rgb(0,0,0)"/>
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<path d="M725,17L743,17" style="fill:none;stroke-width:2.16;stroke:rgb(0,0,0);" />
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<circle cx="752" cy="17" r="3.6" style="fill:none;stroke-width:2.16;stroke:rgb(0,0,0);" />
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<polygon points="275,47 264,51 264,43" style="fill:rgb(0,0,0)"/>
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<path d="M186,17 L 193,17 Q 201,17 201,32 L 201,32 Q 201,47 216,47 L 254,47 L 269,47" style="fill:none;stroke-width:2.16;stroke:rgb(0,0,0);" />
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<path d="M275,47 L 350,47 Q 365,47 365,32 L 365,32 Q 365,17 372,17 L 380,17" style="fill:none;stroke-width:2.16;stroke:rgb(0,0,0);" />
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<polygon points="467,47 456,51 456,43" style="fill:rgb(0,0,0)"/>
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<path d="M372,17 L 379,17 Q 387,17 387,32 L 387,32 Q 387,47 402,47 L 447,47 L 462,47" style="fill:none;stroke-width:2.16;stroke:rgb(0,0,0);" />
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<path d="M467,47 L 584,47 Q 599,47 599,32 L 599,32 Q 599,17 606,17 L 614,17" style="fill:none;stroke-width:2.16;stroke:rgb(0,0,0);" />
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</svg>
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</div>
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</div>
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<p>The DROP TABLE statement removes a table added with the
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<a href="lang_createtable.html">CREATE TABLE</a> statement. The name specified is the
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table name. The dropped table is completely removed from the database
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schema and the disk file. The table can not be recovered.
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All indices and triggers
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associated with the table are also deleted.</p>
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<p>The optional IF EXISTS clause suppresses the error that would normally
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result if the table does not exist.</p>
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<p>If <a href="foreignkeys.html">foreign key constraints</a> are enabled, a DROP TABLE command performs an
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implicit <a href="lang_delete.html">DELETE FROM</a> command before removing the
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table from the database schema. Any triggers attached to the table are
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dropped from the database schema before the implicit DELETE FROM
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is executed, so this cannot cause any triggers to fire. By contrast, an
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implicit DELETE FROM does cause any configured
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<a href="foreignkeys.html#fk_actions">foreign key actions</a> to take place.
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If the implicit DELETE FROM executed
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as part of a DROP TABLE command violates any immediate foreign key constraints,
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an error is returned and the table is not dropped. If
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the implicit DELETE FROM causes any
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deferred foreign key constraints to be violated, and the violations still
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exist when the transaction is committed, an error is returned at the time
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of commit.
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</p><p align="center"><small><i>This page last modified on <a href="https://sqlite.org/docsrc/honeypot" id="mtimelink" data-href="https://sqlite.org/docsrc/finfo/pages/lang_droptable.in?m=0350dfc779">2022-01-08 05:02:57</a> UTC </small></i></p>
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