![Database SQL
Display PCode, PName, and Price for
PName=‘Monitor’ from Product table
SELECT PCode, PName, Price FROM Product WHERE
PName=‘Monitor’
Display Client#, ClientName from Product table and
Trip#, TripDate, People from Booking table for
Client#=120
SELECT Client.[Client#], Client.ClientName, Booking.
[Trip#], Booking.TripDate, Booking.People FROM
Client INNER JOIN Booking ON Client.[Client#] =
Booking.[Client#] WHERE Client.[Client#]=120
10](https://image.slidesharecdn.com/aspdb-150415144839-conversion-gate02/85/Asp-db-10-320.jpg)
![Database SQL
Sum of People from Booking
SELECT Client.[Client#], Client.ClientName,
Sum(Booking.People) AS SumOfPeople FROM Client
INNER JOIN Booking ON Client.[Client#] = Booking.
[Client#] GROUP BY Client.[Client#],
Client.ClientName
Computed attribute
SELECT Product.ProdID, Product.ProdType,
Product.price, Product.stock, [price]*[stock] AS
StockValue FROM Product
11](https://image.slidesharecdn.com/aspdb-150415144839-conversion-gate02/85/Asp-db-11-320.jpg)
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Asp db
- 1. 1
- 2. ASP.Net using Database 2 ASP .Net VB J# ASP.Net File ADO.Net Objects Database Web Server Client HTTP Request HTTP Response Language Engines
- 3. ADO.NET ActiveX Data Objects (ADO) and its .Net version ADO.Net are Microsoft’s answer to universal data access - at least for all their languages ADO.Net insulates the programmer from database implementation details Allows you to use SQL and ADO.Net objects to accomplish most of your data access and manipulation 3
- 5. ADO.Net Basics ADO.Net designed to separate data access from data manipulation Two central components of ADO.Net .Net Framework Data Provider Connection Command DataReader DataAdapter DataSet DataTableCollection DataRelationCollection 5
- 6. .Net Framework Data Providers Object Description Connection Establishes a connection to a specific data source. Command Executes a command against a data source. Exposes Parameters and can execute within the scope of a Transaction from a Connection. DataReader Reads a forward-only, read-only stream of data from a data source. DataAdapter Populates a DataSet and resolves updates with the data source. 6
- 7. ADO.Net Basics Two .Net Framework providers (by default) SQL Server for all SQL Server databases OLE DB for other databases Microsoft Access 7
- 8. Displaying Database Data 1. Create a data source and connect it to a database through ASP.Net data control 2. Create an appropriate data display Web control 3. Link the Web control to the data source 4. Execute the Page 8
- 9. Database SQL Display all records from Product table SELECT * FROM Product Display the record for attribute PCode=120 from Product table SELECT * FROM Product WHERE PCode=120 Display PCode, PName, and Price for PCode=120 from Product table SELECT PCode, PName, Price FROM Product WHERE PCode=120 9
- 10. Database SQL Display PCode, PName, and Price for PName=‘Monitor’ from Product table SELECT PCode, PName, Price FROM Product WHERE PName=‘Monitor’ Display Client#, ClientName from Product table and Trip#, TripDate, People from Booking table for Client#=120 SELECT Client.[Client#], Client.ClientName, Booking. [Trip#], Booking.TripDate, Booking.People FROM Client INNER JOIN Booking ON Client.[Client#] = Booking.[Client#] WHERE Client.[Client#]=120 10
- 11. Database SQL Sum of People from Booking SELECT Client.[Client#], Client.ClientName, Sum(Booking.People) AS SumOfPeople FROM Client INNER JOIN Booking ON Client.[Client#] = Booking. [Client#] GROUP BY Client.[Client#], Client.ClientName Computed attribute SELECT Product.ProdID, Product.ProdType, Product.price, Product.stock, [price]*[stock] AS StockValue FROM Product 11
- 12. Database Query Creating a String variable that stores a SQL query Dim s as String s= “SELECT PCode, PName, Price FROM Product WHERE PName=‘Monitor’” A SQL query string that includes variable value Dim s, m as String m=“Monitor” s= “SELECT PCode, PName, Price FROM Product WHERE PName=‘” & m & “’” 12