vb net 2d barcode generator Inside Microsoft SQL Server 2008: T-SQL Programming in Visual Studio .NET

Generation Denso QR Bar Code in Visual Studio .NET Inside Microsoft SQL Server 2008: T-SQL Programming

Inside Microsoft SQL Server 2008: T-SQL Programming
QR Encoder In VS .NET
Using Barcode generation for ASP.NET Control to generate, create QR Code image in ASP.NET applications.
www.OnBarcode.com
Bar Code Drawer In .NET
Using Barcode drawer for ASP.NET Control to generate, create bar code image in ASP.NET applications.
www.OnBarcode.com
speaking, query strings executed with sp_executesql were limited to the largest supported length of a Unicode character string (NVARCHAR), which was 4,000 characters . EXEC, on the other hand, supported a regular character (VARCHAR) input code string, allowing up to 8,000 characters . Furthermore, EXEC supports a special functionality that allows you to concatenate multiple variables within the parentheses, each up to the maximum supported size of 8,000 characters, like so:
QR Code Generation In C#
Using Barcode creator for Visual Studio .NET Control to generate, create QR-Code image in .NET framework applications.
www.OnBarcode.com
Paint QR Code 2d Barcode In .NET Framework
Using Barcode printer for Visual Studio .NET Control to generate, create QR Code image in .NET framework applications.
www.OnBarcode.com
DECLARE @sql1 AS VARCHAR(8000), @sql2 AS VARCHAR(8000), @sql3 AS VARCHAR(8000); SET @sql1 = <part 1>; SET @sql2 = <part 2>; SET @sql3 = <part 3>; EXEC(@sql1 + @sql2 + @sql3);
Print QR In VB.NET
Using Barcode creator for VS .NET Control to generate, create QR Code 2d barcode image in VS .NET applications.
www.OnBarcode.com
Make QR Code In .NET
Using Barcode generation for ASP.NET Control to generate, create QR-Code image in ASP.NET applications.
www.OnBarcode.com
However, this technique is very awkward, and it requires some acrobatics to construct code strings longer than 8,000 characters . In SQL Server 2008, this technique is not needed because you can provide the EXEC command with a variable defined as VARCHAR(MAX) or NVARCHAR(MAX) as input . The input string can be up to 2 gigabytes (GB) in size, which is the maximum supported size for large objects in SQL Server 2008 . For example, the following code generates a large batch with more than 8,000 characters and executes it:
Make USS Code 128 In VS .NET
Using Barcode drawer for ASP.NET Control to generate, create Code128 image in ASP.NET applications.
www.OnBarcode.com
Painting Bar Code In .NET
Using Barcode encoder for ASP.NET Control to generate, create bar code image in ASP.NET applications.
www.OnBarcode.com
DECLARE @sql AS VARCHAR(MAX) = 'PRINT ''This output was generated by' + REPLICATE(CAST('.' AS VARCHAR(MAX)), 100000) + '''' + CHAR(13) + CHAR(10) + 'PRINT ''a long batch.'''; EXEC(@sql); SELECT LEN(@sql) AS batch_length;
Data Matrix ECC200 Generation In .NET
Using Barcode generation for ASP.NET Control to generate, create Data Matrix image in ASP.NET applications.
www.OnBarcode.com
EAN / UCC - 13 Printer In VS .NET
Using Barcode printer for ASP.NET Control to generate, create UCC-128 image in ASP.NET applications.
www.OnBarcode.com
This code generates the following output, shown here in abbreviated form:
Barcode Encoder In .NET
Using Barcode maker for ASP.NET Control to generate, create bar code image in ASP.NET applications.
www.OnBarcode.com
4-State Customer Barcode Maker In VS .NET
Using Barcode maker for ASP.NET Control to generate, create 4-State Customer Barcode image in ASP.NET applications.
www.OnBarcode.com
This output was generated by... a long batch. batch_length -------------------100059
Matrix Barcode Encoder In Java
Using Barcode encoder for Java Control to generate, create Matrix Barcode image in Java applications.
www.OnBarcode.com
Quick Response Code Encoder In Java
Using Barcode encoder for Android Control to generate, create QR Code JIS X 0510 image in Android applications.
www.OnBarcode.com
As you can see, the LEN function reports a batch length of 100,059 characters .
Code 128 Code Set A Generator In .NET
Using Barcode maker for Reporting Service Control to generate, create Code-128 image in Reporting Service applications.
www.OnBarcode.com
Encode PDF-417 2d Barcode In Java
Using Barcode generation for Eclipse BIRT Control to generate, create PDF-417 2d barcode image in BIRT reports applications.
www.OnBarcode.com
EXEC AT
Data Matrix ECC200 Generator In None
Using Barcode generation for Software Control to generate, create Data Matrix ECC200 image in Software applications.
www.OnBarcode.com
Creating ANSI/AIM Code 39 In Java
Using Barcode creation for Java Control to generate, create ANSI/AIM Code 39 image in Java applications.
www.OnBarcode.com
SQL Server 2008 supports the EXEC AT syntax, which allows you to invoke dynamic pass-through code against a linked server . In certain cases this feature is preferable to the alternative method of submitting pass-through code against linked servers using the OPENQUERY table function . OPENQUERY has several limitations: the input query string
EAN 128 Recognizer In VB.NET
Using Barcode decoder for Visual Studio .NET Control to read, scan read, scan image in .NET applications.
www.OnBarcode.com
Code 39 Full ASCII Encoder In Java
Using Barcode generator for BIRT Control to generate, create Code-39 image in BIRT reports applications.
www.OnBarcode.com
9 Dynamic SQL
must be static it can t be a variable and it can t accept input arguments . Furthermore, you invoke OPENQUERY in the FROM clause of an outer query, so the function must represent a table . This requirement is very limiting when you just want to invoke executable code against the target server; for example, DDL statements . Similar limitations apply to the OPENROWSET table function . For details about the OPENQUERY and OPENROWSET functions, please refer to SQL Server Books Online . All these limitations are addressed by the EXEC AT command . To see the capabilities of the EXEC AT command, from a SQL Server 2008 instance, create a linked server to another SQL Server instance to which you have access, for example, a local instance of SQL Server Express . I will use a linked server called Dojo in my examples:
EXEC sp_addlinkedserver [Dojo], 'SQL Server';
The following example shows how you can use input parameters in the input string:
EXEC ( 'SELECT productid, productname, unitprice FROM InsideTSQL2008.Production.Products WHERE ProductID = ;', 3 ) AT [Dojo];
I m assuming in this example that the InsideTSQL2008 database exists in the target server, and permissions were set to allow access to the target linked server . EXEC invokes a query against Dojo, which returns the product details of a specified product ID (3 in this case):
productid productname unitprice ---------- -------------- ---------3 Product IMEHJ 10.00
The question mark is replaced with the specified input value . The input value doesn t have to be a constant; it can be a variable:
DECLARE @pid AS INT; SET @pid = 3; EXEC ( 'SELECT productid, productname, unitprice FROM InsideTSQL2008.Production.Products WHERE ProductID = ;', @pid ) AT [Dojo];
In fact, even the input code string can be a variable, which you construct dynamically:
DECLARE @sql AS NVARCHAR(500), @pid AS INT; SET @sql = 'SELECT productid, productname, unitprice
Inside Microsoft SQL Server 2008: T-SQL Programming
FROM InsideTSQL2008.Production.Products WHERE ProductID = ;' SET @pid = 3; EXEC(@sql, @pid) AT [Dojo];
Furthermore, EXEC doesn t have to return a table result . The following example creates a table called T1 in tempdb at Dojo:
EXEC ( 'USE tempdb; IF OBJECT_ID(''dbo.T1'', ''U'') IS NOT NULL DROP TABLE dbo.T1; CREATE TABLE dbo.T1 ( keycol INT NOT NULL PRIMARY KEY, datacol VARCHAR(10) NOT NULL );' ) AT [Dojo];
Remember that the AT clause allows you to invoke pass-through code at a specified linked server . The pass-through code is in the target server s dialect, and the target server type is not limited to SQL Server . It can be any OLEDB or ODBC provider supported as a linked server . To demonstrate the use of EXEC AT against a non SQL Server provider, first Use Microsoft Access 2007 to create a blank Access database called Database1 in the folder C:\temp . Then, execute the following code, which creates and configures a linked server called AccessDatabase1 against the Access database you created:
-- Create a linked server to an Access database EXEC sp_addlinkedserver @server = 'AccessDatabase1', @provider = 'Microsoft.ACE.OLEDB.12.0', @srvproduct = 'OLE DB Provider for ACE', @datasrc = 'C:\temp\Database1.accdb';
For security reasons, use the sp_droplinkedsrvlogin stored procedure to remove the default self-mapping added for all local logins . Use the sp_addlinkedsrvlogin stored procedure to map local logins to a security account on the remote server, like so:
-- Remove default self-mapping added for all local logins EXEC sp_droplinkedsrvlogin 'AccessDatabase1', NULL; -- Add login mappings EXEC sp_addlinkedsrvlogin 'AccessDatabase1', 'false', '<specify_local_login_name_here>', Admin, NULL; GO
Use the sp_serveroption stored procedure to allow remote procedure calls (RPCs) against the linked server, like so:
-- Allow RPC out EXEC sp_serveroption 'AccessDatabase1', 'rpc out', true;
Copyright © OnBarcode.com . All rights reserved.