Programming using Database Object

Why Database Automation?

All tables in the Web

Application must

populate from the database

REQUIREMENT SPECS.

Database Automation Process

Create an instance of ADO database object 1

Prepare the connection string2

Open the database connection3

Create an ADO Recordset4

Steps in Database Automation:

Create SQL query5

Open the Recordset6

Extract data from the Record set 7

Close the Recordset and Database connection8

Step 1: Creating an ADO Connection to the Database

It acts as programming interface to access data in a database.

It is a Microsoft Technology

Active X Data Objects

ADO

CreateObject(“ADODB.Connection”)

Set objDBConnection = CreateObject(“ADODB.Connection”)

Creation of ADO Connection Creating the instance of ADO - database connection object by using the CreateObject()

method

Step 2: Preparing Connection String

'Use Fields and get the record set column count when we don't ‘know the 'column count

'Create an ADO connection to a databaseSet objDBConnection = CreateObject("ADODB.Connection")

'Connection String for MSAccess Database - DSN lessstrAccessDBPath = "C:\Program Files\HP\QuickTestProfessional\samples\flight32.mdb"

strConnString = "Provider=Microsoft.Jet.OLEDB.4.0;Data Source=" & strAccessDBPath

It is better to store the physical path of the database in a variable.

Note:

Provider is Microsoft Jet OLEDB 4.0.

The Provider details vary with the type of database we want to connect to, and location of the database.

Note:

We need to specify the provider

For the password protected database, you also need to provide valid database User ID and Password in the connection string.

Note:

Data Source

Step 3: Opening the Database Connection

'Use Fields and get the record set column count when we don't ‘know the 'column count

'Create an ADO connection to a databaseSet objDBConnection = CreateObject("ADODB.Connection" )

'Connection String for MSAccess Database - DSN lessstrAccessDBPath = "C:\Program Files\HP\QuickTestProfessional\samples\flight32.mdb"

strConnString = "Provider=Microsoft.Jet.OLEDB.4.0;Data Source=" & strAccessDBPath

'Open the database connectionobjDBConnection.Open strConnString

To open the database, we need to use the Open method of Database object.

Step 4: Creating an ADO Recordset

'Use Fields and get the record set column count when we don't ‘know the 'column count

'Create an ADO connection to a databaseSet objDBConnection = CreateObject("ADODB.Connection" )

'Connection String for MSAccess Database - DSN lessstrAccessDBPath = "C:\Program Files\HP\QuickTestProfessional\samples\flight32.mdb"

strConnString = "Provider=Microsoft.Jet.OLEDB.4.0;Data Source=" & strAccessDBPath

'Open the database connectionobjDBConnection.Open strConnString

'Create an ADO recordsetSet objRecordSet = CreateObject("ADODB.Recordset")

The ADO Record set object is used to hold a set of records from a database table. A Record set object consist of records

and columns (fields).

CreateObject(“ADODB.Recordset”)

Step 5: Creating SQL Query

'Use Fields and get the record set column count when we don't ‘know the 'column count

'Create an ADO connection to a databaseSet objDBConnection = CreateObject("ADODB.Connection" )

'Connection String for MSAccess Database - DSN lessstrAccessDBPath = "C:\Program Files\HP\QuickTestProfessional\samples\flight32.mdb"

strConnString = "Provider=Microsoft.Jet.OLEDB.4.0;Data Source=" & strAccessDBPath

'Open the database connectionobjDBConnection.Open strConnString

'Open the database connectionSet objRecordSet = CreateObject("ADODB.Recordset")

'SQLQuery to get the datastrQuery = "SELECT * FROM Orders WHERE Order_Number<=5"

Step 6: Opening the Recordset

'Use Fields and get the record set column count when we don't ‘know the 'column count

'Create an ADO connection to a databaseSet objDBConnection = CreateObject("ADODB.Connection" )

'Connection String for MSAccess Database - DSN lessstrAccessDBPath = "C:\Program Files\HP\QuickTestProfessional\samples\flight32.mdb"

strConnString = "Provider=Microsoft.Jet.OLEDB.4.0;Data Source=" & strAccessDBPath

'Open the database connectionobjDBConnection.Open strConnString

'Open the database connectionSet objRecordSet = CreateObject("ADODB.Recordset")

'SQLQuery to get the datastrQuery = "SELECT * FROM Orders WHERE Order_Number<=5“

'Open the recordset objRecordSet.Open strQuery,objDBConnection

Step 7: Extracting Data from the Recordset

'Open the database connectionSet objRecordSet = CreateObject("ADODB.Recordset")

'SQLQuery to get the datastrQuery = "SELECT * FROM Orders WHERE Order_Number<=5“

'Open the recordset objRecordSet.Open strQuery,objDBConnection

'Record Set has only one row - Get column count of record set using FieldsintColumnCount = objRecordSet.Fields.Count

'Read all the fields from record setFor intCol = 0 to intColumnCount-1

msgbox "Column Name:" & objRecordSet.Fields.Item(intCol).Name & vbNewLine&_ "Value:" & objRecordSet(intCol)

Next

Step 8: Closing Recordset and Database Connections

'Open the database connectionSet objRecordSet = CreateObject("ADODB.Recordset")

'SQLQuery to get the datastrQuery = "SELECT * FROM Orders WHERE Order_Number<=5“

'Open the recordset objRecordSet.Open strQuery,objDBConnection

'Record Set has only one row - Get column count of record set using FieldsintColumnCount = objRecordSet.Fields.Count

'Read all the fields from record setFor intCol = 0 to intColumnCount-1 msgbox "Column Name:" & objRecordSet.Fields.Item(intCol).Name & vbNewLine&_ "Value:" & objRecordSet(intCol)Next

'Close RecordSet and Database ConnectionsobjRecordSet.Close

objDBConnection.Close