Skills | data | database | Database connection method and skill of common database connecting ASP
Posted: Snow Date: 2005-02-28 Views: 19
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<%
Dim conn,mdbfile
Mdbfile=server.mappath ("database name. mdb")
Set Conn=server.createobject ("Adodb.connection")
Conn.Open "Driver={microsoft Access Driver (*.mdb)};uid=admin;pwd= database password; dbq=" &mdbfile
%>
2. asp and SQL database connection:
<%
Dim conn
Set Conn=server.createobject ("Adodb.connection")
Con.open "Provider=sqloledb;data source=sql server name or IP address; Uid=sa; pwd= Database Password
;D atabase= Database name
%>
To set up a Recordset object:
Set Rs=server.createobject ("Adodb.recordset")
Rs.Open SQL statement, conn,3,2
3. SQL Common Command use method:
(1) Data record filtering:
Sql= "SELECT * from data table where field name = field value order By field name"
Sql= "SELECT * from data table where field name like '% field value ' Order By field name '
Sql= "SELECT top * from data table where field name order By field name"
Sql= "SELECT * from data table where field name in (' Value 1 ', ' Value 2 ', ' Value 3 ')"
Sql= "SELECT * from data table where field name between value 1 and value 2"
(2) Update data records:
sql= "Update data table set field name = field value where Condition expression"
Sql= Update data Table set field 1= value 1, field 2= value 2 ... field n= value n Where Condition expression "
(3) Delete data records:
Sql= "Delete from data table where condition expression"
Sql= "Delete from data table" (delete all records from datasheet)
(4) Adding data records:
sql= INSERT into Data table (field 1, Field 2, Field 3 ...) valuess (value 1, value 2, value 3 ...)
Sql= INSERT INTO Target datasheet SELECT * from source datasheet (add a record from the source datasheet to the destination datasheet)
(5) Data record statistic function:
AVG (field name) to derive a table column average
Count (*| field name) statistics on the number of data rows or the number of data rows that have a value for a column
Max (field name) gets the maximum value of a table column
Min (field name) gets the smallest value of a table column
sum (field name) adds the value of the data bar
How to reference the above function:
Sql= "Select sum (field name) as Alias from data table where condition expression"
Set Rs=conn.excute (SQL)
Using RS ("Alias") to obtain the value of the unified, other functions using the same.
(5) The establishment and deletion of the data table:
CREATE Table datasheet Name (field 1 type 1 (length), Field 2 type 2 (length) ...)
Example: CREATE TABLE tab01 (name varchar, datetime default Now ())
drop table datasheet name (permanently deletes a data table)
(6) Method of Recordset object:
Rs.movenext moves the record pointer down one row from the current position
Rs.moveprevious move the record pointer up one row from the current position
Rs.movefirst move the record pointer to the first row of the datasheet
Rs.movelast move the record pointer to the last row of the datasheet
Rs.absoluteposition=n move the record pointer to the nth row of the datasheet
Rs.absolutepage=n move the record pointer to the first row of page N
Rs.pagesize=n set every page to N records
Rs.pagecount returns the total number of pages based on pagesize settings
Rs.recordcount returns the total number of records
RS.BOF returns whether the record pointer is over the first end of the datasheet, True indicates Yes, FALSE is no
Rs.eof returns whether the record pointer is over the end of the datasheet, True indicates Yes, FALSE is no
Rs.delete deletes the current record, but the record pointer does not move down
Rs.addnew add records to the end of the datasheet
Rs.update Update datasheet Record
To determine the data is a digital type
If not IsNumeric (Request (field name)) Then
Response.Write "Not Numbers"
Else
Response.Write "Number"
End If
Operations on the database are often used. Including the connection code, SQL commands, and so on, and never deliberately to remember them (I am not willing to
To remember this stuff), so often in the use of time to check the books, turn over. Some of the less-used databases don't have to be easy to find.
, so now they are all summed up here, to provide you with reference. (Personal level is limited, there are defects, you are welcome to correct the point.) ）
< a >. How the database is connected:
1.Access Database Dsn-less Connection method:
Set Adocon=server.createobject ("Adodb.connection")
Adoconn. Open driver={microsoft Access Driver (*.mdb)};D bq= "& _
Server.MapPath ("Path to Database")
2.Access OLE db connection method:
Set Adocon=server.createobject ("Adodb.connection")
Adocon.open "Provider=Microsoft.Jet.OLEDB.4.0;" & _
"Data source=" & Server.MapPath ("Path to Database")
3.SQL Server Connection method:
Set Adocon=server.createobject ("Adodb.recordset")
ADOcon. Open "Driver={sql Server}; server= (local); uid=***; pwd=***; " & _
"Database= database name;"
4.SQL Server OLE db connection method:
Set Adocon=server.createobject ("Adodb.connection")
Adocon.open "Provider=SQLOLEDB.1;Data source=ritant4;" & _
"User id=***; password=***; " & _
"Inital catalog= database name"
5.Oracle Connection method:
Set Adocon=server.createobject ("Adodb.connection")
Adocon.open "Driver={microsoft ODBC for Oracle};server=oraclesever.world;uid=admin;pwd=pass;"
6.Oracle OLE DB Connection method:
Set Adocon=server.createobject ("Adodb.connection")
Adocon.open "Provider=oraoledb.oracle;data source=dbname;user id=admin;password=pass;"
7.dBase Connection method:
Set Adocon=server.createobject ("Adodb.connection")
Adocon.open "Driver={microsoft dbase Driver (*.db
