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<a href="intro.html"><h2>SQLite C Interface</h2></a><h2>Column Names In A Result Set</h2><blockquote><pre>const char *sqlite3_column_name(sqlite3_stmt*, int N);
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const void *sqlite3_column_name16(sqlite3_stmt*, int N);
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</pre></blockquote><p>
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These routines return the name assigned to a particular column
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in the result set of a <a href="../lang_select.html">SELECT</a> statement. The sqlite3_column_name()
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interface returns a pointer to a zero-terminated UTF-8 string
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and sqlite3_column_name16() returns a pointer to a zero-terminated
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UTF-16 string. The first parameter is the <a href="../c3ref/stmt.html">prepared statement</a>
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that implements the <a href="../lang_select.html">SELECT</a> statement. The second parameter is the
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column number. The leftmost column is number 0.</p>
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<p>The returned string pointer is valid until either the <a href="../c3ref/stmt.html">prepared statement</a>
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is destroyed by <a href="../c3ref/finalize.html">sqlite3_finalize()</a> or until the statement is automatically
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reprepared by the first call to <a href="../c3ref/step.html">sqlite3_step()</a> for a particular run
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or until the next call to
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sqlite3_column_name() or sqlite3_column_name16() on the same column.</p>
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<p>If sqlite3_malloc() fails during the processing of either routine
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(for example during a conversion from UTF-8 to UTF-16) then a
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NULL pointer is returned.</p>
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<p>The name of a result column is the value of the "AS" clause for
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that column, if there is an AS clause. If there is no AS clause
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then the name of the column is unspecified and may change from
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one release of SQLite to the next.
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</p><p>See also lists of
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<a href="objlist.html">Objects</a>,
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<a href="constlist.html">Constants</a>, and
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<a href="funclist.html">Functions</a>.</p>
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