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BULK INSERT parameters
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For a detailed description of the BULK INSERT command s many options, see the SQL Server 2005 Books Online topic BULK INSERT (Transact-SQL).
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Let s look at the same parameters we discussed for bcp to compare what they look like in BULK INSERT.
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Lesson 3: Performing a BULK INSERT Task
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FIELDTERMINATOR Specifies the field or column terminator or delimiter. As with the bcp -t parameter, the default value is /t (tab character). To explicitly declare a different field terminator, such as | (the pipe character), you would specify the following as part of the BULK INSERT command:
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FIELDTERMINATOR = |
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ROWTERMINATOR Specifies the row terminator or delimiter. As with the bcp -r parameter, the default value is /n (newline character). To explicitly declare a different row terminator, such as |>| (the pipe, greater than, and pipe characters concatenated together), you specify the following as part of the BULK INSERT command:
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ROWTERMINATOR = |>|
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FIRSTROW Specifies the first row in the file that will be inserted into the table. As with the bcp -F parameter, FIRSTROW can be used to skip a header row or to restart the loading of a file at a certain row number. To explicitly declare a row to start at, such as row 2, you would specify the following as part of the BULK INSERT command:
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FIRSTROW = 2
BULK INSERT Permissions
When it comes to BULK INSERT security, there are a few things to note, especially because SQL Server 2005 handles security differently from SQL Server 2000. SQL Server 2005 varies from SQL Server 2000 in how it verifies file access permissions. In SQL Server 2000, it didn t matter what type of login was used (Windows user or SQL login); the BULK INSERT command would access the import file by using the security privileges of the SQL Server service account. This was a potential security issue that might allow users to get access to a file that their Windows user accounts could not get to directly. In SQL Server 2005, using an integrated login, the BULK INSERT command uses the file access privileges of the user account that is executing the query, not the SQL Server service account. The only exception to this is if SQL Server is operating in Mixed Mode, and the BULK INSERT command is executed by a SQL Server login that does not map to a Windows user account. In this case, SQL Server still uses the file access permissions of the SQL Server service account. In addition, to use the BULK INSERT command, the user executing the BULK INSERT command must have at least INSERT and ADMINISTER BULK OPERATION permissions. And if the BULK INSERT command will suspend trigger execution, suspend constraint checking, or use the KEEPIDENTITY option, the user must also have ALTER TABLE permissions.
10
Working with Flat Files
Quick Check
What permissions are needed to run the following BULK INSERT command
BULK INSERT Table1 FROM 'c:\test.txt'
Quick Check Answer
To import data by using the BULK INSERT command, the user must have INSERT permissions on the target table and ADMINISTER BULK OPERATION permission on the server. Additionally, the defaults that are implied by the preceding command are that triggers and constraints will be disabled; therefore, the user also needs ALTER TABLE permission.
PRACTICE
Import Data by Using BULK INSERT
In this practice, you run the BULK INSERT command to import 500 rows into the Exam table in the FileImportDB database.
IMPORTANT
Perform Lesson 2, Practice 1 first
The necessary database, table, and files for this practice were created or copied during Practice 1, Prepare the Environment, in Lesson 2 of this chapter. Perform that practice before attempting the following exercise.
1. If necessary, open SSMS and connect to the server that you are using for these exercises. 2. Open a new query window by pressing Ctrl+N. 3. Try to formulate the proper BULK INSERT command to copy the ExamImportFile.txt into the FileImportDB..Exam table. Remember that the defaults for column and row terminators are /t (tab) and /n (newline), respectively. 4. When you think you have the right command, try executing it in the SQL window. It doesn t matter whether the data is imported more than once, so there is no need to clear the table between attempts. 5. Hints: If you are having trouble, remember that there are several ways to form the BULK INSERT command properly. However, unlike the bcp command, you do not have to specify that it is character data because that is the default for BULK INSERT. 6. Here is the simplest command:
BULK INSERT FileImportDB..Exam FROM 'c:\FileImportPractice\ExamImportFile.txt'
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