pass null value to sql parameter

... Team LiB ] Recipe 2.14 Passing Null Values to Parameters Problem You need to pass a null value to a parameter. Solution Use the System.DbNull .Value static value. The sample code, as ... 2-18. Stored procedure: SP0214_NullParameter CREATE PROCEDURE SP0214_NullParameter @ValueIn int AS if @ValueIn is null select 1 as IsParameterNull else select 0 as IsParameterNull ... initialized. Passing a null parameter value into a stored procedure is not very different than passing any other parameter value. Construct the parameter using either the Parameter constructor or...

Ngày tải lên: 14/12/2013, 18:16

... LINQ to SQL Tutorial 3 Mục lục Bài 1: Sử dụng LINQ to SQL 6 1. LINQ to SQL là gì? 6 2. Mô hình hóa CSDL dùng LINQ to SQL: 6 3. Tìm hiểu lớp DataContext 7 4. Các ví dụ LINQ to SQL 8 ... của sổ thiết kế LINQ to SQL, và cũng là cái mà bạn sẽ thấy ngay khi tạo ra một mô hình dữ liệu LINQ to SQL: LINQ to SQL Tutorial 30 Câu SQL ở trên cho phép tính to n tất cả các giá trị ... cách dùng LINQ to SQL DataContext, và tất cả các thay đổi đó sẽ được lưu vết lại. 2009 LINQ to SQL Tutorial From ScottGu blog Đào Hải Nam LINQ to SQL Tutorial 7 ...

Ngày tải lên: 12/01/2013, 16:18

... 51202 Israel LINQ to Relational Data • LINQ to DataSet – Leveraging the existing investment • LINQ to SQL – Designer-generated mapping – Custom mapping, ORM facilities • LINQ to Entities – VS2008 ... 51202 Israel Querying Inheritance • The OfType query operator – The LINQ to SQL query provider translates it to a WHERE on the discriminator column //LINQ: var cars = from car in context.GetTable<Vehicle>() ... Israel What’s Supported? • All language-integrated query operators • Most standard query operators • Inserts, updates and deletes • Custom SQL commands (strings) • Database creation from mapping • Transactional...

Ngày tải lên: 12/01/2013, 16:18

Ngày tải lên: 06/08/2013, 17:30

Ngày tải lên: 06/08/2013, 17:33

... iDATA.ws Chapter 20 Using LINQ to SQL After completing this chapter, you will be able to:  Build LINQ queries that use the LINQ to SQL provider  Understand how LINQ to SQL prepares queries for ... processing SQL Server data. This chapter focuses on the LINQ to SQL provider and the benefits it supplies to your data- focused application. In many ways, LINQ to SQL feels like LINQ to Entities, ... LINQ to SQL provider. This “Update on LINQ to SQL and LINQ to Entities Roadmap” blog entry posted by the ADO.NET team (http://blogs.msdn.com/b/adonet/archive/2008/10/29/update-on-linq -to- sql- and-linq -to- entities-roadmap.aspx)...

Ngày tải lên: 03/10/2013, 00:20

... Connecting to SQL Server Using Integrated Security from ASP.NET Problem You want to coordinate Windows security accounts between an ASP.NET application and SQL Server. Solution Connect to SQL Server ... account to provide authentication information. It does not expose the user ID and password and is the recommended method for authenticating a connection. SQL Server Authentication Uses a SQL Server ... Solution Connect to SQL Server from ASP.NET using Windows Authentication in SQL Server. Discussion Connecting to a SQL Server database provides two different authentication modes: Windows Authentication...

Ngày tải lên: 24/12/2013, 05:15

... network library to be monitored is installed and configured. Available network libraries for SQL Server 2000 include: AppleTalk ADSP Allows Apple Macintosh to communicate with SQL Server using ... protocol. Banyan VINES Supports Banyan VINES Sequenced Packet Protocol (SPP) across Banyan VINES IP network protocol. Multiprotocol Automatically chooses the first available network protocol ... TCP/IP Sockets [ Team LiB ] Recipe 1.6 Using an IP Address to Connect to SQL Server Problem You want to connect to a SQL Server using its IP address instead of its server name. Solution Use...

Ngày tải lên: 21/01/2014, 11:20

... decided to implement is not always easy and may represent a real obstacle. Members will suddenly be obliged to bear the psychologi- cal costs involved in agreeing to be monitored, and to adhere to ... is quickly to obtain a geographical indication so as to create institutional barriers to be added to the technical or geophysical ones already in place. The objective is legally to underpin ... marks that are of particular relevance to producers who wish to implement a joint value- adding strategy. Specifically, groups of operators often decide to work with certification marks or collective...

Ngày tải lên: 18/02/2014, 21:20

... according with sample pulses to fire thyristor valves. - Pulse Amplifier: to amplify both sample pusles and controlling pulses to fire desired thyristor valves. - Isolator: to isolate the power circuit ... time to issue controlling pulses in the positive half-cycles of applied voltage to thyritor valves. - Generate firing pulses to fire thyristor valves. The pulses have amplitudes from 2 V to 10 ... change in spite of using Automatic Reactive Power Regulator. To regulate voltage and cosφ in an expected range, it is necessary to change the parameters of regulators as the loads change. Determining...

Ngày tải lên: 05/03/2014, 14:20

... need to describe the parameters that you pass to routines, give examples of their use, give a revision history of the routine, and so on, then it suddenly all gets more dicult unless you store ... NOT NULL , [NickName] [nvarchar](50) NOT NULL , [LastName] [nvarchar](50) NOT NULL , [DateOfBirth] [datetime] NULL , [insertiondate] [datetime] NOT NULL , [terminationdate] [datetime] NULL ... Generating Simple INSERT Statements 307 Summary 308 Chapter 11: SQL Refactoring 309 Why Refactor SQL? 309 Requirements for Successful SQL Refactoring 311 A set-based mindset 311 Consistent naming conventions...

Ngày tải lên: 08/03/2014, 22:20

Ngày tải lên: 23/03/2014, 21:20

Ngày tải lên: 25/03/2014, 20:22

Ngày tải lên: 18/04/2014, 10:24