Obtains [TableColumnSchema-Information] according to provider for specified [Table] via [Database] connected.
<co type="warning" inline="true">
    This method may needs some privilege according to the database product and its version.
</co>


<st>Return</st>
<div class="table-responsive">
    <table class="table table-bordered table-striped">
        <thead class="thead-dark">
            <tr>
                <th>SchemaTableColumnInfo</th>
                <th>Description</th>
            </tr>
        </thead>
        <tr><td>Catalog			</td><td>Table qualifier</td></tr>
        <tr><td>Schema			</td><td>Name of schema that contains the table.</td></tr>
        <tr><td>Table			</td><td>Table name.</td></tr>
        <tr><td>Name			</td><td>Column name.</td></tr>
        <tr><td>Ordinal			</td><td>Column identification number.</td></tr>
        <tr><td>Nullable        </td><td>Nullability of the column.</td></tr>
        <tr><td>DefaultValue    </td><td>Default value of the column.</td></tr>
        <tr><td>Length          </td><td>Precision of approximate numeric columns. This value is the Maximum length of characters, for types of binary, character, text and image.</td></tr>
        <tr><td>Scale	        </td><td>Scale of approximate numeric data.</td></tr>
        <tr><td>IsKey			</td><td>Is Column in primary-key.</td></tr>
        <tr><td>DataTypeName	</td><td>Database type name of the column.</td></tr>
        <tr><td>DataType		</td><td>.Net system type of the column.</td></tr>
        <tr><td>ColumnType	    </td><td>Table definition type of the column.</td></tr>
    </table>
</div>

<st>Examples</st>

Following section demonstrates reading the columns a of table <b>by its name</b>.
<sample>
    <pre lang="c#">
        using(var exc = cn.Executer()) 
			var columns = exc.GetTableColumns("table_name");
    </pre>
    <output>
    </output>
    <fiddle>RLg7Jd</fiddle>
</sample>

<br />

Following section demonstrates reading the columns of a table <b>by its instance</b>.
<sample>
    <pre lang="c#">
		var columns = (new Orders()).GetTableColumns();
    </pre>
    <output>
    </output>
    <fiddle>RLg7Jd</fiddle>
</sample>