ASP gets the database table name, field name, and some actions on the field

Recently, in the ASP forum to see a lot of netizens asked how to get the database table name, field name and how to delete the field, add the operation so write this article.
I am more familiar with SQL Server, so SQL Server is the column:
<%
SET conn=server.createobject ("ADODB. Connection ")
Conn.Open "SERVER=IP address; provider=sqloledb;database= library name; uid= user name; pwd= password; "
%>
Read the table name in the SQL Server library:
<%
Set Rs=conn.openschema (20)
While not Rs. Eof
Response.Write ("Database name:" & RS (0) & "<br>")
Response.Write ("Owner:" & RS (1) & "<br>")
Response.Write ("Table name:" & RS (2) & "<br>")
Response.Write ("Type of Table:" & RS (3) & "<br>")
Rs. MoveNext
Wend
%>
So, we know the table name, so let's take a look at how to manipulate the table's fields.
Suppose: There are tables in the database: [Things], fields in the table: Id,thingsname,thingstype
Get all field names for this table:
<%
Dim I,j,sql
Set rs=server.createobject ("ADODB. Recordset ")
Sql= "SELECT * from [things] where 1<>1"
Rs.Open sql,conn,1,1
J=rs. Fields.Count
For I=0 to (J-1)
Response.Write ("First" & i+1 & "field Name:" & Rs. Fields (i). Name & "<br><br>")
Next
%>
OK, now we know how to get the name of the field.
If you want to do something about the value of the field you get, this is OK:
For example, if we want to delete the field thingstype in the table [things], we can
To write in this way:
<%
Sql= "ALTER TABLE [things] DROP COLUMN thingstype"
Conn.execute SQL
%>
For example, we want to add a field thingscolor, its type is varchar type, length is 20, and the default value is red, as follows:
<%
Sql= "ALTER TABLE [things] ADD thingscolor VARCHAR () DEFAULT ' Red '
Conn.execute SQL
%>
The basic operation of the above fields is implemented in the SQL language, in the ASP, through the SQL language, we have sufficient permissions to complete
More database operations, such as create tables, delete tables with drop, etc.
Finally, I talents, this article certainly will have the mistake place, also hoped everybody criticizes.
Also hope that everyone in the csdn text to me to discuss together, thank you!