Using bind variables makes the statement reusable with different input values.
Using bind variables also improves query performance in the database, eliminates the need for special handling of literal quotation marks in the input, and protects against SQL injection attacks.
Note: If you are using SQL Server stored procedures to edit or delete data using a Data Adapter, make sure that you do not use SET NOCOUNT ON in the stored procedure definition. Table Mappings properties to facilitate the loading and updating of data. Update Command are generic templates that are automatically filled with individual values from every modified row through the parameters mechanism.
Sql Data Adapter is used in conjunction with Sql Connection and Sql Command to increase performance when connecting to a SQL Server database.
But How can you associate a Transaction with CUD commands given that you have no direct control over the Command generation?
This causes the rows affected count returned to be zero, which the Data Adapter interprets as a concurrency conflict. When an instance of Sql Data Adapter is created, the read/write properties are set to initial values. For every column that you propagate to the data source on Db Data Adapter. However, primary key information is not included in the implicitly created schema unless the Data Adapter. When the Sql Data Adapter fills a Data Set, it creates the necessary tables and columns for the returned data if they do not already exist.In Lesson 4, we learned about how to read data quickly an let go of the connection with the Sql Data Reader.This Lesson shows how to accomplish something in-between Sql Connection and Sql Data Reader interaction by using the Data Set and Sql Data Adapter objects.When a database receives a SQL statement, it determines if the statement has already been executed and stored in memory.