Validating data in vb net
The size of table-valued parameters is limited only by server memory.
Before table-valued parameters were introduced to SQL Server 2008, the options for passing multiple rows of data to a stored procedure or a parameterized SQL command were limited.
For working with database ANSI SQL null values, use System. Because null is considered to be unknown, two null values compared to each other are not considered to be equal. The following truth tables show how the AND, OR, and NOT operators function in the presence of a null value. All arithmetic operators ( , -, *, /, %), bitwise operators (~, &, |), and most functions return null if any of the operands or arguments is null, except for the property = NULL in a WHERE clause. Write Line(" Two empty strings=", Sql String Equals(a, b)) Console.
The incoming data rows are stored in a table variable that can then be operated on by using Transact-SQL.This ' Assumes connection is an open Sql Connection. Categories (Category ID, Category Name)" _ & " SELECT nc. Category Name" _ & " FROM @tvp New Categories AS nc;" ' Configure the command and parameter. Execute Non Query() End Using You can also use any object derived from Db Data Reader to stream rows of data to a table-valued parameter.Using connection ' Create a Data Table with the modified rows. Dim insert Command As New Sql Command(sql Insert, connection) Dim tvp Param As Sql Parameter = _ insert Command. Add With Value( _ "@tvp New Categories", added Categories) tvp Param. The following code fragment demonstrates retrieving data from an Oracle database by using an Oracle Command and an Oracle Data Reader. The following Transact-SQL fragment demonstrates how to declare a table-valued parameter in a stored procedure definition.Note that the READONLY keyword is required for declaring a table-valued parameter.