data matrix code c# Figure 11-31. Returning a number of characters starting from the right in Visual C#

Generator Data Matrix in Visual C# Figure 11-31. Returning a number of characters starting from the right

Figure 11-31. Returning a number of characters starting from the right
Creating ECC200 In C#
Using Barcode creation for .NET Control to generate, create ECC200 image in Visual Studio .NET applications.
www.OnBarcode.com
Scan Data Matrix In C#
Using Barcode recognizer for .NET framework Control to read, scan read, scan image in VS .NET applications.
www.OnBarcode.com
CHAPTER 11 T-SQL ESSENTIALS
Barcode Maker In Visual C#
Using Barcode generation for Visual Studio .NET Control to generate, create Barcode image in .NET framework applications.
www.OnBarcode.com
Matrix Printer In C#
Using Barcode encoder for Visual Studio .NET Control to generate, create Matrix Barcode image in .NET applications.
www.OnBarcode.com
RTRIM()
QR-Code Maker In Visual C#.NET
Using Barcode creation for .NET framework Control to generate, create Denso QR Bar Code image in .NET applications.
www.OnBarcode.com
PDF-417 2d Barcode Generation In C#
Using Barcode encoder for .NET framework Control to generate, create PDF 417 image in Visual Studio .NET applications.
www.OnBarcode.com
When you have a CHAR() data type, no matter how many characters you enter, the variable will be filled on the right, known as right padded, with spaces. To remove these, use RTRIM. This will change the data from a fixed-length CHAR() to a variable length value.
Draw DataMatrix In C#
Using Barcode creation for Visual Studio .NET Control to generate, create Data Matrix 2d barcode image in .NET framework applications.
www.OnBarcode.com
British Royal Mail 4-State Customer Barcode Creator In Visual C#.NET
Using Barcode maker for .NET framework Control to generate, create RoyalMail4SCC image in Visual Studio .NET applications.
www.OnBarcode.com
Try It Out: RTRIM()
Data Matrix Generator In .NET
Using Barcode creation for Reporting Service Control to generate, create Data Matrix 2d barcode image in Reporting Service applications.
www.OnBarcode.com
Painting Data Matrix 2d Barcode In None
Using Barcode maker for Office Word Control to generate, create Data Matrix 2d barcode image in Word applications.
www.OnBarcode.com
1. This example has no spaces after Robin, and we will prove the space padding with the first column returned from the following code. The second column has the spaces trimmed. DECLARE @StringTest char(10) SET @StringTest = 'Robin' SELECT @StringTest+'-End',RTRIM(@StringTest)+'-End' 2. And the results are as expected, as shown in Figure 11-32.
Code 39 Printer In Java
Using Barcode printer for Android Control to generate, create Code 3/9 image in Android applications.
www.OnBarcode.com
DataMatrix Creator In None
Using Barcode maker for Font Control to generate, create ECC200 image in Font applications.
www.OnBarcode.com
Figure 11-32. Removing spaces from the right
Barcode Generator In .NET
Using Barcode generator for ASP.NET Control to generate, create Barcode image in ASP.NET applications.
www.OnBarcode.com
Decoding QR Code 2d Barcode In Java
Using Barcode scanner for Java Control to read, scan read, scan image in Java applications.
www.OnBarcode.com
STR()
Barcode Generation In None
Using Barcode encoder for Office Excel Control to generate, create Barcode image in Excel applications.
www.OnBarcode.com
Generate Barcode In Visual Basic .NET
Using Barcode encoder for VS .NET Control to generate, create Barcode image in .NET framework applications.
www.OnBarcode.com
Some data types have implicit conversions. We will see later how to complete explicit conversions, but a simple conversion that will take any numeric value and convert it to a variable length string is STR(), which we look at next.
Create GS1 - 12 In None
Using Barcode creation for Online Control to generate, create UPC-A Supplement 2 image in Online applications.
www.OnBarcode.com
Denso QR Bar Code Creation In Java
Using Barcode creator for Java Control to generate, create QR-Code image in Java applications.
www.OnBarcode.com
Try It Out: STR()
Barcode Printer In Java
Using Barcode maker for Android Control to generate, create Barcode image in Android applications.
www.OnBarcode.com
Make USS-128 In None
Using Barcode creator for Microsoft Excel Control to generate, create UCC - 12 image in Microsoft Excel applications.
www.OnBarcode.com
1. Our first example demonstrates that we cannot add a number, 82, to a string. SELECT 'A'+82 2. When the preceding code is executed, you will see the following error: Msg 245, Level 16, State 1, Line 1 Conversion failed when converting a value of type varchar to type int. Ensure that all values of the expression being converted can be converted to the target type, or modify query to avoid this type conversion.
CHAPTER 11 T-SQL ESSENTIALS
3. Changing the example to include the STR() function will convert this numeric to a string of varying length such as varchar(). SELECT 'A'+STR(82) 4. Instead of an error, we now see the desired result, which appears in Figure 11-33. However, it isn t really desirable as there are spaces between the letter and the number. Leading zeros are translated to spaces.
Figure 11-33. Changing a number to a string 5. By including an LTRIM() function, we can remove those spaces: SELECT 'A'+LTRIM(STR(82)) 6. This code will now produce the correct results, as you see in Figure 11-34.
Figure 11-34. Changing a number to a string and removing leading spaces
SUBSTRING()
As you have seen, you can take a number of characters from the left and from the right of a string. To retrieve a number of characters that do not start with the first or last character, you need to use the function SUBSTRING(). This has three parameters: the variable or column, which character to start the retrieval from, and the number of characters to return.
Try It Out: SUBSTRING()
1. Define the variable we wish to return a substring from. Once complete, we can then take the variable, inform SQL Server we wish to start the substring at character position 3, and return the remaining characters. DECLARE @StringTest char(10) SET @StringTest = 'Robin ' SELECT SUBSTRING(@StringTest,3,LEN(@StringTest))
CHAPTER 11 T-SQL ESSENTIALS
2. And we have the desired result, as shown in Figure 11-35.
Figure 11-35. Returning part of a string from within a string
UPPER()
The final example is the reverse of the LOWER() function and will change all characters to uppercase.
Try It Out: UPPER()
1. After the declared variable has been set, we then use the UPPER() function to change the value to uppercase: DECLARE @StringTest char(10) SET @StringTest = 'Robin ' SELECT UPPER(@StringTest) 2. And as you can see from Figure 11-36, Robin becomes ROBIN.
Figure 11-36. Change the case of a string to uppercase
System Functions
System functions are functions that provide extra functionality outside of the boundaries that can be defined as string, numeric, or date related. Three of these functions will be used extensively throughout our code, and therefore you should pay special attention to CASE, CAST, and ISNULL.
CASE WHEN...THEN...ELSE...END
The first function is when we wish to test a condition. WHEN that condition is true THEN we can do further processing, ELSE if it is false, then we can do something else. What happens in the WHEN section and the THEN section can range from another CASE statement to providing a value that sets a column or a variable.
Copyright © OnBarcode.com . All rights reserved.