ASP and Database operations

Data | Database 1.ASP connect to Access database:
Dimstrconn
Dimconn
Strconn= "provider=microsoft.jet.oledb.4.0;datasource=" +server.mappath ("Data/db1.mdb") + "; Persistsecurityinfo=false "
Setconn=server.createobject ("ADODB.") Connection ")

2. Connect with SQL database:
Dimconn
Setconn=server.createobject ("Adodb.connection")
Con.open "Provider=sqloledb;datasource=sql server name or IP address; Uid=sa; pwd= database password; database= database name

Set up Recordset object: Setrs=server.createobject ("Adodb.recordset")
Rs.opensql statement, conn,1,3

Data record filtering:
sql= "select*from data table where field name = field value By field name"
sql= "select*from data table where field name like '% field value ' by field name '
sql= "selecttop10*from data table where field name 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 1and value 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 nwhere conditional expression "

To delete a data record:
sql= "deletefrom data table where condition expression"
sql= "Deletefrom data table" (delete all records in datasheet)

To add a data record:
Sql= "Insertinto Datasheet (field 1, Field 2, Field 3 ...) Valuess (value 1, value 2, value 3 ...) "
Sql= "Insertinto target datasheet select*from source data Table" (Add a record from the source data table to the destination datasheet)

Data Logging Statistics 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= "selectsum (field name) as Alias from data table where condition expression"
Setrs=conn.excute (SQL)
Using RS ("Alias") to obtain the value of the unified, other functions using the same.

Data table creation and deletion:
CreateTable Datasheet Name (field 1 type 1 (length), Field 2 type 2 (length) ...)
Example: CREATETABLEtab01 (Namevarchar), Datetimedefaultnow ())
Droptable data table name (permanently deletes a datasheet)

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