254 lines
11 KiB
HTML
254 lines
11 KiB
HTML
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<title>CREATE VIEW</title>
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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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CREATE VIEW
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</div>
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</div>
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<h1 id="syntax"><span>1. </span>Syntax</h1>
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<p><b><a href="syntax/create-view-stmt.html">create-view-stmt:</a></b>
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<button id='x1535' onclick='hideorshow("x1535","x1536")'>hide</button></p>
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<div id='x1536' class='imgcontainer'>
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<img alt="syntax diagram create-view-stmt" src="images/syntax/create-view-stmt.gif" />
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<p><b><a href="syntax/select-stmt.html">select-stmt:</a></b>
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<button id='x1537' onclick='hideorshow("x1537","x1538")'>show</button></p>
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<div id='x1538' style='display:none;' class='imgcontainer'>
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<img alt="syntax diagram select-stmt" src="images/syntax/select-stmt.gif" />
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<p><b><a href="syntax/common-table-expression.html">common-table-expression:</a></b>
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<button id='x1539' onclick='hideorshow("x1539","x1540")'>show</button></p>
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<div id='x1540' style='display:none;' class='imgcontainer'>
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<img alt="syntax diagram common-table-expression" src="images/syntax/common-table-expression.gif" />
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</div>
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<p><b><a href="syntax/compound-operator.html">compound-operator:</a></b>
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<button id='x1541' onclick='hideorshow("x1541","x1542")'>show</button></p>
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<div id='x1542' style='display:none;' class='imgcontainer'>
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<img alt="syntax diagram compound-operator" src="images/syntax/compound-operator.gif" />
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</div>
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<p><b><a href="syntax/expr.html">expr:</a></b>
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<button id='x1543' onclick='hideorshow("x1543","x1544")'>show</button></p>
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<div id='x1544' style='display:none;' class='imgcontainer'>
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<img alt="syntax diagram expr" src="images/syntax/expr.gif" />
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<p><b><a href="syntax/filter-clause.html">filter-clause:</a></b>
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<button id='x1545' onclick='hideorshow("x1545","x1546")'>show</button></p>
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<div id='x1546' style='display:none;' class='imgcontainer'>
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<img alt="syntax diagram filter-clause" src="images/syntax/filter-clause.gif" />
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</div>
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<p><b><a href="syntax/literal-value.html">literal-value:</a></b>
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<button id='x1547' onclick='hideorshow("x1547","x1548")'>show</button></p>
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<div id='x1548' style='display:none;' class='imgcontainer'>
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<img alt="syntax diagram literal-value" src="images/syntax/literal-value.gif" />
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</div>
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<p><b><a href="syntax/over-clause.html">over-clause:</a></b>
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<button id='x1549' onclick='hideorshow("x1549","x1550")'>show</button></p>
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<div id='x1550' style='display:none;' class='imgcontainer'>
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<img alt="syntax diagram over-clause" src="images/syntax/over-clause.gif" />
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<p><b><a href="syntax/frame-spec.html">frame-spec:</a></b>
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<button id='x1551' onclick='hideorshow("x1551","x1552")'>show</button></p>
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<div id='x1552' style='display:none;' class='imgcontainer'>
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<img alt="syntax diagram frame-spec" src="images/syntax/frame-spec.gif" />
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</div>
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</div>
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<p><b><a href="syntax/raise-function.html">raise-function:</a></b>
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<button id='x1553' onclick='hideorshow("x1553","x1554")'>show</button></p>
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<div id='x1554' style='display:none;' class='imgcontainer'>
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<img alt="syntax diagram raise-function" src="images/syntax/raise-function.gif" />
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</div>
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<p><b><a href="syntax/type-name.html">type-name:</a></b>
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<button id='x1555' onclick='hideorshow("x1555","x1556")'>show</button></p>
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<div id='x1556' style='display:none;' class='imgcontainer'>
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<img alt="syntax diagram type-name" src="images/syntax/type-name.gif" />
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<p><b><a href="syntax/signed-number.html">signed-number:</a></b>
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<button id='x1557' onclick='hideorshow("x1557","x1558")'>show</button></p>
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<div id='x1558' style='display:none;' class='imgcontainer'>
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<img alt="syntax diagram signed-number" src="images/syntax/signed-number.gif" />
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</div>
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</div>
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</div>
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<p><b><a href="syntax/join-clause.html">join-clause:</a></b>
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<button id='x1559' onclick='hideorshow("x1559","x1560")'>show</button></p>
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<div id='x1560' style='display:none;' class='imgcontainer'>
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<img alt="syntax diagram join-clause" src="images/syntax/join-clause.gif" />
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<p><b><a href="syntax/join-constraint.html">join-constraint:</a></b>
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<button id='x1561' onclick='hideorshow("x1561","x1562")'>show</button></p>
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<div id='x1562' style='display:none;' class='imgcontainer'>
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<img alt="syntax diagram join-constraint" src="images/syntax/join-constraint.gif" />
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</div>
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<p><b><a href="syntax/join-operator.html">join-operator:</a></b>
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<button id='x1563' onclick='hideorshow("x1563","x1564")'>show</button></p>
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<div id='x1564' style='display:none;' class='imgcontainer'>
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<img alt="syntax diagram join-operator" src="images/syntax/join-operator.gif" />
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</div>
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</div>
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<p><b><a href="syntax/ordering-term.html">ordering-term:</a></b>
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<button id='x1565' onclick='hideorshow("x1565","x1566")'>show</button></p>
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<div id='x1566' style='display:none;' class='imgcontainer'>
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<img alt="syntax diagram ordering-term" src="images/syntax/ordering-term.gif" />
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</div>
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<p><b><a href="syntax/result-column.html">result-column:</a></b>
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<button id='x1567' onclick='hideorshow("x1567","x1568")'>show</button></p>
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<div id='x1568' style='display:none;' class='imgcontainer'>
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<img alt="syntax diagram result-column" src="images/syntax/result-column.gif" />
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</div>
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<p><b><a href="syntax/table-or-subquery.html">table-or-subquery:</a></b>
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<button id='x1569' onclick='hideorshow("x1569","x1570")'>show</button></p>
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<div id='x1570' style='display:none;' class='imgcontainer'>
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<img alt="syntax diagram table-or-subquery" src="images/syntax/table-or-subquery.gif" />
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</div>
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<p><b><a href="syntax/window-defn.html">window-defn:</a></b>
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<button id='x1571' onclick='hideorshow("x1571","x1572")'>show</button></p>
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<div id='x1572' style='display:none;' class='imgcontainer'>
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<img alt="syntax diagram window-defn" src="images/syntax/window-defn.gif" />
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<p><b><a href="syntax/frame-spec.html">frame-spec:</a></b>
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<button id='x1573' onclick='hideorshow("x1573","x1574")'>show</button></p>
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<div id='x1574' style='display:none;' class='imgcontainer'>
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<img alt="syntax diagram frame-spec" src="images/syntax/frame-spec.gif" />
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</div>
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</div>
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</div>
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</div>
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<h1 id="description"><span>2. </span>Description</h1>
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<p>The CREATE VIEW command assigns a name to a pre-packaged
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<a href="lang_select.html">SELECT</a> statement.
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Once the view is created, it can be used in the FROM clause
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of another <a href="lang_select.html">SELECT</a> in place of a table name.
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</p>
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<p>If the "TEMP" or "TEMPORARY" keyword occurs in between "CREATE"
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and "VIEW" then the view that is created is only visible to the
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<a href="c3ref/sqlite3.html">database connection</a> that created it and is automatically deleted when
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the database connection is closed.</p>
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<p> If a <span class='yyterm'>schema-name</span> is specified, then the view
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is created in the specified database.
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It is an error to specify both a <span class='yyterm'>schema-name</span>
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and the TEMP keyword on a VIEW, unless the <span class='yyterm'>schema-name</span>
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is "temp".
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If no schema name is specified, and the TEMP keyword is not present,
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the VIEW is created in the main database.</p>
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<p>You cannot <a href="lang_delete.html">DELETE</a>, <a href="lang_insert.html">INSERT</a>, or <a href="lang_update.html">UPDATE</a> a view. Views are read-only
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in SQLite. However, in many cases you can use an
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<a href="lang_createtrigger.html#instead_of_trigger">INSTEAD OF trigger</a> on the view to accomplish
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the same thing. Views are removed
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with the <a href="lang_dropview.html">DROP VIEW</a> command.</p>
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<p>If a <span class='yyterm'>column-name</span> list follows
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the <span class='yyterm'>view-name</span>, then that list determines
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the names of the columns for the view. If the <span class='yyterm'>column-name</span>
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list is omitted, then the names of the columns in the view are derived
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from the names of the result-set columns in the <a href="syntax/select-stmt.html">select-stmt</a>.
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The use of <span class='yyterm'>column-name</span> list is recommended. Or, if
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<span class='yyterm'>column-name</span> list is omitted, then the result
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columns in the <a href="lang_select.html">SELECT</a> statement that defines the view should have
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well-defined names using the
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"<a href="syntax/result-column.html">AS column-alias</a>" syntax.
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SQLite allows you to create views that depend on automatically
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generated column names, but you should avoid using them since the
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rules used to generate column names are not a defined part of the
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interface and might change in future releases of SQLite.
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</p><p>The <span class='yyterm'>column-name</span> list syntax was added in
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SQLite versions 3.9.0 (2015-10-14).
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</p>
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