JavaScript operation Oracle database example_javascript skills
I am still a newbie in the IT world and have not been working for a long time. However, with my eagerness to learn and my never-ending pace of learning, I have gained a lot in programming~~
I always thought that JavaScript must call server-side code (C# or JAVA) through AJAX if it wants to interact with the database, but recently I discovered that JavaScript can interact with the database directly... The following is a simple call from the database A small example of loading data into the interface (if you have any good suggestions about JS operation data, I hope you can leave them, we can learn from each other and make progress together)~~
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
<HTML>
<HEAD>
<TITLE> New Document </TITLE>
<META NAME="Generator" CONTENT="EditPlus">
<META NAME="Author" CONTENT="">
<META NAME="Keywords" CONTENT="">
<META NAME="Description" CONTENT="">
<script type="text/javascript">
function getData()
{
//定义SQL语句
var sql = "select obj_id,obj_caption from mw_sys.mwt_om_obj where rownum<5000";
//新建数据库连接对象和数据集存取对象
var ConnDB = new ActiveXObject("ADODB.Connection");
ConnDB.open("Provider=MSDAORA.1;Password=app;User ID=mw_app;Data Source=pms;Persist Security Info=True");
var rs = new ActiveXObject("ADODB.Recordset");
rs.ActiveConnection = ConnDB;
rs.Open(sql);
//遍历
var s;
var rownum=0;
var shtml="<table cellpadding=0; cellspacing=0; style='border:solid 1px gray;'><thead><td style='border:solid 1px gray; text-align:center;'>行号</td><td style='border:solid 1px gray; text-align:center;'>作业文本ID号</td><td style='border:solid 1px gray;'>专业编号</td><tbody>";
while(!rs.EOF)
{
shtml+="<tr><td style='border:solid 1px gray; text-align:center;'>";
shtml+=rownum+1;
shtml+="</td>";
for(i = 0;i<rs.Fields.Count;++i)
{
shtml+="<td style='border:solid 1px gray; background-color:yellow;'>";
shtml+=rs.Fields(i).value==null?" ":rs.Fields(i).value;
shtml+="</td>";
}
shtml+="</tr>";
rownum++;
if(rownum==1000)
break;
rs.MoveNext();
}
shtml+="</tbody></table>";
rs.close();
ConnDB.close();
document.getElementById("data").innerHTML=shtml;
}
</script>
</HEAD>
<BODY>
<input type="button" value="Table" onclick="getData()"/>
<div id="data">
</div>
</BODY>
</HTML>
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