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Get the designated column's table's schema.</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"><CODE> <A HREF="../../java/lang/String.html">String</A></CODE></FONT></TD><TD><CODE><B><A HREF="../../java/sql/ResultSetMetaData.html#getTableName(int)">getTableName</A></B>(int column)</CODE><BR> Gets the designated column's table name.</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"><CODE> boolean</CODE></FONT></TD><TD><CODE><B><A HREF="../../java/sql/ResultSetMetaData.html#isAutoIncrement(int)">isAutoIncrement</A></B>(int column)</CODE><BR> Indicates whether the designated column is automatically numbered, thus read-only.</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"><CODE> boolean</CODE></FONT></TD><TD><CODE><B><A HREF="../../java/sql/ResultSetMetaData.html#isCaseSensitive(int)">isCaseSensitive</A></B>(int column)</CODE><BR> Indicates whether a column's case matters.</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"><CODE> boolean</CODE></FONT></TD><TD><CODE><B><A HREF="../../java/sql/ResultSetMetaData.html#isCurrency(int)">isCurrency</A></B>(int column)</CODE><BR> Indicates whether the designated column is a cash value.</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"><CODE> boolean</CODE></FONT></TD><TD><CODE><B><A HREF="../../java/sql/ResultSetMetaData.html#isDefinitelyWritable(int)">isDefinitelyWritable</A></B>(int column)</CODE><BR> Indicates whether a write on the designated column will definitely succeed.</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"><CODE> int</CODE></FONT></TD><TD><CODE><B><A HREF="../../java/sql/ResultSetMetaData.html#isNullable(int)">isNullable</A></B>(int column)</CODE><BR> Indicates the nullability of values in the designated column.</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"><CODE> boolean</CODE></FONT></TD><TD><CODE><B><A HREF="../../java/sql/ResultSetMetaData.html#isReadOnly(int)">isReadOnly</A></B>(int column)</CODE><BR> Indicates whether the designated column is definitely not writable.</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"><CODE> boolean</CODE></FONT></TD><TD><CODE><B><A HREF="../../java/sql/ResultSetMetaData.html#isSearchable(int)">isSearchable</A></B>(int column)</CODE><BR> Indicates whether the designated column can be used in a where clause.</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"><CODE> boolean</CODE></FONT></TD><TD><CODE><B><A HREF="../../java/sql/ResultSetMetaData.html#isSigned(int)">isSigned</A></B>(int column)</CODE><BR> Indicates whether values in the designated column are signed numbers.</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"><CODE> boolean</CODE></FONT></TD><TD><CODE><B><A HREF="../../java/sql/ResultSetMetaData.html#isWritable(int)">isWritable</A></B>(int column)</CODE><BR> Indicates whether it is possible for a write on the designated column to succeed.</TD></TR></TABLE> <P><!-- ============ FIELD DETAIL =========== --><A NAME="field_detail"><!-- --></A><TABLE BORDER="1" CELLPADDING="3" CELLSPACING="0" WIDTH="100%"><TR BGCOLOR="#CCCCFF" CLASS="TableHeadingColor"><TD COLSPAN=1><FONT SIZE="+2"><B>Field Detail</B></FONT></TD></TR></TABLE><A NAME="columnNoNulls"><!-- --></A><H3>columnNoNulls</H3><PRE>public static final int <B>columnNoNulls</B></PRE><DL><DD>The constant indicating that a column does not allow <code>NULL</code> values.</DL><HR><A NAME="columnNullable"><!-- --></A><H3>columnNullable</H3><PRE>public static final int <B>columnNullable</B></PRE><DL><DD>The constant indicating that a column allows <code>NULL</code> values.</DL><HR><A NAME="columnNullableUnknown"><!-- --></A><H3>columnNullableUnknown</H3><PRE>public static final int <B>columnNullableUnknown</B></PRE><DL><DD>The constant indicating that the nullability of a column's values is unknown.</DL><!-- ========= CONSTRUCTOR DETAIL ======== --><!-- ============ METHOD DETAIL ========== --><A NAME="method_detail"><!-- --></A><TABLE BORDER="1" CELLPADDING="3" CELLSPACING="0" WIDTH="100%"><TR BGCOLOR="#CCCCFF" CLASS="TableHeadingColor"><TD COLSPAN=1><FONT SIZE="+2"><B>Method Detail</B></FONT></TD></TR></TABLE><A NAME="getColumnCount()"><!-- --></A><H3>getColumnCount</H3><PRE>public int <B>getColumnCount</B>() throws <A HREF="../../java/sql/SQLException.html">SQLException</A></PRE><DL><DD>Returns the number of columns in this <code>ResultSet</code> object.<DD><DL><DT><B>Returns:</B><DD>the number of columns<DT><B>Throws:</B><DD><CODE><A HREF="../../java/sql/SQLException.html">SQLException</A></CODE> - if a database access error occurs</DL></DD></DL><HR><A NAME="isAutoIncrement(int)"><!-- --></A><H3>isAutoIncrement</H3><PRE>public boolean <B>isAutoIncrement</B>(int column) throws <A HREF="../../java/sql/SQLException.html">SQLException</A></PRE><DL><DD>Indicates whether the designated column is automatically numbered, thus read-only.<DD><DL><DT><B>Parameters:</B><DD><CODE>column</CODE> - the first column is 1, the second is 2, ...<DT><B>Returns:</B><DD><code>true</code> if so; <code>false</code> otherwise<DT><B>Throws:</B><DD><CODE><A HREF="../../java/sql/SQLException.html">SQLException</A></CODE> - if a database access error occurs</DL></DD></DL><HR><A NAME="isCaseSensitive(int)"><!-- --></A><H3>isCaseSensitive</H3><PRE>public boolean <B>isCaseSensitive</B>(int column) throws <A HREF="../../java/sql/SQLException.html">SQLException</A></PRE><DL><DD>Indicates whether a column's case matters.<DD><DL><DT><B>Parameters:</B><DD><CODE>column</CODE> - the first column is 1, the second is 2, ...<DT><B>Returns:</B><DD><code>true</code> if so; <code>false</code> otherwise<DT><B>Throws:</B><DD><CODE><A HREF="../../java/sql/SQLException.html">SQLException</A></CODE> - if a database access error occurs</DL></DD></DL><HR><A NAME="isSearchable(int)"><!-- --></A><H3>isSearchable</H3><PRE>public boolean <B>isSearchable</B>(int column) throws <A HREF="../../java/sql/SQLException.html">SQLException</A></PRE><DL><DD>Indicates whether the designated column can be used in a where clause.<DD><DL><DT><B>Parameters:</B><DD><CODE>column</CODE> - the first column is 1, the second is 2, ...<DT><B>Returns:</B><DD><code>true</code> if so; <code>false</code> otherwise<DT><B>Throws:</B><DD><CODE><A HREF="../../java/sql/SQLException.html">SQLException</A></CODE> - if a database access error occurs</DL></DD></DL><HR><A NAME="isCurrency(int)"><!-- --></A><H3>isCurrency</H3><PRE>public boolean <B>isCurrency</B>(int column) throws <A HREF="../../java/sql/SQLException.html">SQLException</A></PRE><DL><DD>Indicates whether the designated column is a cash value.<DD><DL><DT><B>Parameters:</B><DD><CODE>column</CODE> - the first column is 1, the second is 2, ...<DT><B>Returns:</B><DD><code>true</code> if so; <code>false</code> otherwise<DT><B>Throws:</B><DD><CODE><A HREF="../../java/sql/SQLException.html">SQLException</A></CODE> - if a database access error occurs</DL></DD></DL><HR><A NAME="isNullable(int)"><!-- --></A><H3>isNullable</H3><PRE>public int <B>isNullable</B>(int column) throws <A HREF="../../java/sql/SQLException.html">SQLException</A></PRE><DL><DD>Indicates the nullability of values in the designated column.<DD><DL><DT><B>Parameters:</B><DD><CODE>column</CODE> - the first column is 1, the second is 2, ...<DT><B>Returns:</B><DD>the nullability status of the given column; one of <code>columnNoNulls</code>, <code>columnNullable</code> or <code>columnNullableUnknown</code><DT><B>Throws:</B><DD><CODE><A HREF="../../java/sql/SQLException.html">SQLException</A></CODE> - if a database access error occurs</DL></DD></DL><HR><A NAME="isSigned(int)"><!-- --></A><H3>isSigned</H3><PRE>public boolean <B>isSigned</B>(int column) throws <A HREF="../../java/sql/SQLException.html">SQLException</A></PRE><DL><DD>Indicates whether values in the designated column are signed numbers.<DD><DL><DT><B>Parameters:</B><DD><CODE>column</CODE> - the first column is 1, the second is 2, ...<DT><B>Returns:</B><DD><code>true</code> if so; <code>false</code> otherwise<DT><B>Throws:</B><DD><CODE><A HREF="../../java/sql/SQLException.html">SQLException</A></CODE> - if a database access error occurs</DL></DD></DL><HR><A NAME="getColumnDisplaySize(int)"><!-- --></A><H3>getColumnDisplaySize</H3><PRE>public int <B>getColumnDisplaySize</B>(int column)⌨️ 快捷键说明
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