oracle与sql的区别（常用函数）

前台页面：
<div class="mtgz_prev_next">
<p>
<span class="textcolor6">上一篇：</span>
<asp:Label ID="lblPre" runat="server" Text=""></asp:Label>
</p>
<p>
<span class="textcolor6">下一篇： </span>
<asp:Label ID="lblNext" runat="server" Text=""></asp:Label>
</p>
</div>

后台代码：
protected void GetPreTitle()
{
if (!string.IsNullOrEmpty(NewsID))
{
int num = Convert.ToInt32(NewsID);
DataSet ds = bll.GetList("ID=" + (num - 1));
if (ds.Tables[0].Rows.Count > 0)
{
newsArr["PreTitle"] = ds.Tables[0].Rows[0]["Title"].ToString();
newsArr["PreID"] = num - 1;
lblPre.Text=" <a href=ljwm-mtgz-ny.aspx?ID=" + newsArr["PreID"].ToString() + ">" + newsArr["PreTitle"].ToString() + "</a>";
}
else
{
lblPre.Text ="已经是第一篇";
}
}
}

protected void GetNextTitle()
{
if (!string.IsNullOrEmpty(NewsID))
{
int num = Convert.ToInt32(NewsID);
DataSet ds = bll.GetList("ID=" + (num + 1));
if (ds.Tables[0].Rows.Count > 0)
{
newsArr["NextTitle"] = ds.Tables[0].Rows[0]["Title"].ToString();
newsArr["NextID"] = num + 1;
lblNext.Text = " <a href=ljwm-mtgz-ny.aspx?ID=" + newsArr["NextID"].ToString() + ">" + newsArr["NextTitle"].ToString() + "</a>";
}
else
{
lblNext.Text ="已经是最后一篇";
}
}
}