How to implement addition, deletion, modification and query of database in js_javascript skills

JavaScript operates the database and JS operates the Access database, which is similar to other language operations. I have summarized the custom codes for reference only.
Now there is a file abc.mdf in the F drive, the table name is Student, there are 2 fields in total, Id numeric type primary key, stuName text type, now add, delete, modify and check the table:
1. Query

Copy code The code is as follows:

<script> <BR>var conn = new ActiveXObject("ADODB.Connection"); <BR>conn.Open("DBQ=f:// abc.mdb;DRIVER={Microsoft Access Driver (*.mdb)};"); <BR>var rs = new ActiveXObject("ADODB.Recordset"); <BR>var sql="select * from Student"; <BR>rs.open(sql, conn); <BR>var html=""; <BR>while(!rs.EOF) <BR>{ <BR>html=html rs.Fields("Id") " " rs.Fields("stuName"); <BR>rs.moveNext(); <BR>} <BR>document.write(html); <BR>rs.close(); <BR>rs = null; <BR>conn.close(); <BR>conn = null; <BR></script>

2. Add operation

Copy code The code is as follows:

Number

3. Delete Operation

Copy code The code is as follows:

4. Modification operation

Copy code The code is as follows:

<script> <BR>function updateUser(userId,userName) <BR>{ <BR>var conn = new ActiveXObject("ADODB.Connection"); <BR>conn.Open("DBQ=F://abc.mdb;DRIVER={Microsoft Access Driver (*.mdb)};"); <BR>var rs = new ActiveXObject("ADODB.Recordset"); <BR>var sql="update Student set stuName='" userName "' where Id=" userId ""; <BR>conn.execute(sql); <BR>conn.close(); <BR>conn = null; <BR>alert("修改成功"); <BR>} <BR></script>

编号	姓名

另外，JS也可以操作SQL Server数据库
数据库名为：MySchool，表名为Student，StudentId为int类型，自增列，studentName为学生姓名，为varchar类型。数据库用户名为sa，密码是ok，

复制代码 代码如下:

<script> <BR>var conn = new ActiveXObject("ADODB.Connection"); <BR>conn.Open("Driver={SQL server};Server=.;DataBase=MySchool;UID=sa;Password=ok;");//打开数据库 <BR>var rs = new ActiveXObject("ADODB.Recordset"); <BR>var sql="select * from Student"; <BR>rs.open(sql, conn); <BR>var html=""; <BR>while(!rs.EOF) <BR>{ <BR>html=html rs.Fields("StudentId") " " rs.Fields("studentName") "<br/>"; <BR>rs.moveNext(); <BR>} <BR>document.write(html); <BR>rs.close(); <BR>rs = null; <BR>conn.close(); <BR>conn = null; <BR></script>