c# generate barcode free Figure 2-28. Scripting variables let you reuse T-SQL scripts from sqlcmd statements. in Font

Drawing Code-39 in Font Figure 2-28. Scripting variables let you reuse T-SQL scripts from sqlcmd statements.

Figure 2-28. Scripting variables let you reuse T-SQL scripts from sqlcmd statements.
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Typing one or more sqlcmd statements into a text file and saving the file with a .bat extension can simplify the use of sqlcmd statements. Windows operating systems (and MS DOS too) recognizes .bat files as batch files. A batch file can include one or more cmd.exe commands and other commands, such as sqlcmd statements, that you can execute from a command prompt. The contents of a batch file are plain text that you can enter and edit from Notepad or any text editor.
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cmd.exe is an outgrowth of command.com for MS DOS. cmd.exe ships with Windows NT, Windows 2000, Windows XP, and Windows 2003.
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Figure 2-29 shows Notepad open with a file named ListColumnValues.bat. The sqlcmd statement in ListColumnValues.bat is the same one in Figure 2-10, with one minor enhancement. The enhancement sends the output to the ColumnValuesOut.rpt file instead of the command prompt window.
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Figure 2-29. You can easily edit sqlcmd statements in a batch file. When you need to rerun or edit a sqlcmd statement, having the statement in a batch file simplifies the task. For example, you can edit the batch file by opening it in Notepad, making your changes, and saving the file with your modifications. Using a sqlcmd statement when it is in a batch file is easier as well. To run the batch file, just type the path and file name for the batch file. You can optionally change the current directory with the CD command to the path containing the batch file. Because batch file names are typically much shorter than sqlcmd statements with multiple switches, this batching approach simplifies the use of sqlcmd statements. Figure 2-30 shows a second batch file named ListColumnValues2.bat. This second batch file contains two sqlcmd statements. Both statements use the ListColumnValues.sql file with its scripting variables. The first sqlcmd statement is identical to the one in Figure 2-11, but the second sqlcmd statement changes the assignment statements for the scripting variables to return customer, instead of shipper, company names. In addition, the second sqlcmd statement uses the >> operator to append its output to the end of the previous output generated by the first sqlcmd statement in the batch file.
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Figure 2-30. Using a batch file, you can run multiple sqlcmd statements sequentially. The output file (ColumnValuesOut.rpt) for the two sqlcmd statements in the ListColumnValues2 batch file contains extended characters, such as an acute accent i ( ) and an umlaut o ( ). The Notepad applet does not represent these extended characters properly when it opens ColumnValuesOut.rpt. However, you can copy directly from the cmd.exe window after invoking the type command for the output file. Figure 2-31 shows an excerpt from the output generated with the type command. Figure 2-32 shows the same excerpt copied from the cmd.exe window to Excel. Notice in both figures that the extended characters appear correctly.
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The normal Ctrl+C shortcut does not work for copying content from a cmd.exe window. To copy text, first you highlight (or mark) the content that you want to copy. Choose the Edit Mark command and then highlight the area of the cmd.exe window that you want to copy. After marking the area, choose Edit Copy from the window's menu or press Enter (you can open the window s menu by clicking the icon in the window's top-left border area). You can paste content that you copy from a cmd.exe window into another application, such as Excel, in the same way that you do from any other application.
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CHAPTER 2 GRAPHICAL AND COMMAND-LINE QUERY TOOLS
Figure 2-31. You can view the output file from a sqlcmd statement with the type command in the cmd.exe window.
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