136 lines
4.6 KiB
HTML
136 lines
4.6 KiB
HTML
<!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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</head>
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<body>
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Small. Fast. Reliable.<br>Choose any three.
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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='x1645' onclick='hideorshow("x1645","x1646")'>hide</button></p>
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<div id='x1646' class='imgcontainer'>
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<img alt="syntax diagram drop-table-stmt" src="images/syntax/drop-table-stmt.gif" />
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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>
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