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><H1
><A
NAME="function.sqlite-query"
></A
>sqlite_query</H1
><DIV
CLASS="refnamediv"
><A
NAME="AEN217754"
></A
><P
> (PHP 5)</P
>sqlite_query<P
> (no version information, might be only in CVS)</P
>SQLiteDatabase->query -- Executes a query against a given database and returns a result handle</DIV
><DIV
CLASS="refsect1"
><A
NAME="AEN217758"
></A
><H2
>说明</H2
>resource <B
CLASS="methodname"
>sqlite_query</B
> ( resource dbhandle, string query [, int result_type [, string &error_msg]] )<BR
></BR
>resource <B
CLASS="methodname"
>sqlite_query</B
> ( string query, resource dbhandle [, int result_type [, string &error_msg]] )<BR
></BR
><P
>Object oriented style (method):</P
>class <B
CLASS="classname"
>SQLiteDatabase</B
> { <BR
></BR
>SQLiteResult <B
CLASS="methodname"
>query</B
> ( string query [, int result_type [, string &error_msg]] )<BR
></BR
>}<P
> Executes an SQL statement given by the <CODE
CLASS="parameter"
>query</CODE
> against
a given database handle.
</P
></DIV
><DIV
CLASS="refsect1"
><A
NAME="AEN217808"
></A
><H2
>参数</H2
><P
> <P
></P
><DIV
CLASS="variablelist"
><DL
><DT
><CODE
CLASS="parameter"
>dbhandle</CODE
></DT
><DD
><P
> The SQLite Database resource; returned from
<A
HREF="function.sqlite-open.html"
><B
CLASS="function"
>sqlite_open()</B
></A
> when used procedurally. This parameter
is not required when using the object-oriented method.
</P
></DD
><DT
><CODE
CLASS="parameter"
>query</CODE
></DT
><DD
><P
> The query to be executed.
</P
></DD
><DT
><CODE
CLASS="parameter"
>result_type</CODE
></DT
><DD
><P
>可选的 <CODE
CLASS="parameter"
>result_type</CODE
>
参数接受一个常量并决定返回的数组如何索引。用
<TT
CLASS="constant"
><B
>SQLITE_ASSOC</B
></TT
> 只会返回关联索引（有名称字段）而
<TT
CLASS="constant"
><B
>SQLITE_NUM</B
></TT
> 只会返回数字索引（有序字段数）。<TT
CLASS="constant"
><B
>SQLITE_BOTH</B
></TT
>
会同时返回关联和数字索引。
<TT
CLASS="constant"
><B
>SQLITE_BOTH</B
></TT
> 是本函数的默认值。</P
></DD
><DT
><CODE
CLASS="parameter"
>error_msg</CODE
></DT
><DD
><P
> The specified variable will be filled if an error occurs. This is
specially important because SQL syntax errors can't be fetched using
the <A
HREF="function.sqlite-last-error.html"
><B
CLASS="function"
>sqlite_last_error()</B
></A
> function.
</P
></DD
></DL
></DIV
>
</P
><DIV
CLASS="note"
><BLOCKQUOTE
CLASS="note"
><P
><B
>注意: </B
>为兼容其它数据库（例如
MySQL），支持另两种替代的语法。推荐用第一种，<CODE
CLASS="parameter"
>dbhandle</CODE
>
参数作为函数的第一个参数。</P
></BLOCKQUOTE
></DIV
></DIV
><DIV
CLASS="refsect1"
><A
NAME="AEN217842"
></A
><H2
>返回值</H2
><P
> This function will return a result handle or <TT
CLASS="constant"
><B
>FALSE</B
></TT
> on failure.
For queries that return rows, the result handle can then be used with
functions such as <A
HREF="function.sqlite-fetch-array.html"
><B
CLASS="function"
>sqlite_fetch_array()</B
></A
> and
<A
HREF="function.sqlite-seek.html"
><B
CLASS="function"
>sqlite_seek()</B
></A
>.
</P
><P
> Regardless of the query type, this function will return <TT
CLASS="constant"
><B
>FALSE</B
></TT
> if the
query failed.
</P
><P
> <B
CLASS="function"
>sqlite_query()</B
> returns a buffered, seekable result
handle. This is useful for reasonably small queries where you need to
be able to randomly access the rows. Buffered result handles will
allocate memory to hold the entire result and will not return until it
has been fetched. If you only need sequential access to the data, it is
recommended that you use the much higher performance
<A
HREF="function.sqlite-unbuffered-query.html"
><B
CLASS="function"
>sqlite_unbuffered_query()</B
></A
> instead.
</P
></DIV
><DIV
CLASS="refsect1"
><A
NAME="AEN217853"
></A
><H2
>更新日志</H2
><P
> <DIV
CLASS="informaltable"
><P
></P
><A
NAME="AEN217856"
></A
><TABLE
BORDER="1"
CLASS="CALSTABLE"
><COL><COL><THEAD
><TR
><TH
>版本</TH
><TH
>说明</TH
></TR
></THEAD
><TBODY
><TR
><TD
>5.1.0</TD
><TD
> Added the <CODE
CLASS="parameter"
>error_msg</CODE
> parameter
</TD
></TR
></TBODY
></TABLE
><P
></P
></DIV
>
</P
></DIV
><DIV
CLASS="refsect1"
><A
NAME="AEN217867"
></A
><H2
>注释</H2
><DIV
CLASS="warning"
><P
></P
><TABLE
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BORDER="1"
WIDTH="100%"
><TR
><TD
ALIGN="CENTER"
><B
>警告</B
></TD
></TR
><TR
><TD
ALIGN="LEFT"
><P
> SQLite <SPAN
CLASS="emphasis"
><I
CLASS="emphasis"
>will</I
></SPAN
> execute multiple queries separated by
semicolons, so you can use it to execute a batch of SQL that you have
loaded from a file or have embedded in a script. However, this works only
when the result of the function is not used - if it is used,
only the first SQL statement would be executed. Function
<A
HREF="function.sqlite-exec.html"
><B
CLASS="function"
>sqlite_exec()</B
></A
> will always execute multiple SQL
statements.
</P
><P
> When executing multiple queries, the return value of this function
will be <TT
CLASS="constant"
><B
>FALSE</B
></TT
> if there was an error, but undefined otherwise (it might
be <TT
CLASS="constant"
><B
>TRUE</B
></TT
> for success or it might return a result handle).
</P
></TD
></TR
></TABLE
></DIV
></DIV
><DIV
CLASS="refsect1"
><A
NAME="AEN217876"
></A
><H2
>参见</H2
><P
> <P
></P
><TABLE
BORDER="0"
><TBODY
><TR
><TD
><A
HREF="function.sqlite-unbuffered-query.html"
><B
CLASS="function"
>sqlite_unbuffered_query()</B
></A
></TD
></TR
><TR
><TD
><A
HREF="function.sqlite-array-query.html"
><B
CLASS="function"
>sqlite_array_query()</B
></A
></TD
></TR
></TBODY
></TABLE
><P
></P
>
</P
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