Indicateurs pour scalper dans les options binaires
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For character data fields, optional terminating characters allow indicateur option binaire en ligne to mark the end of each field in a data file with a field terminator and the end of each row with a row terminator. Terminating characters are one way to indicate to programs that read the data file where one field or row ends and another field or row begins. When you use native or Indicateur option binaire en ligne native format, use length prefixes rather than field indicateur option binaire en ligne.
Native format data can conflict with terminators because a native-format data file is stored in the Microsoft SQL Server internal binary data format.
The following table lists the supported characters for terminators. This means that using the null control character indicateur option binaire en ligne a field or row terminator is different than having no field or row terminator at all. If a terminator character occurs within the data, it is interpreted as a terminator, not as data, and the data after that character is interpreted as belonging to the next field or record.
Therefore, choose your terminators carefully to make sure that they never appear in your data. For example, a low surrogate field terminator would not be a good choice for a field terminator if the indicateur option binaire en ligne contains that low surrogate. The row indicateur option binaire en ligne can be the same character as the terminator for the last field.
Generally, however, a distinct row terminator is useful. When you bulk export char or nchar data, and want to use a non-default terminator, you must specify the terminator to the bcp command. You can specify terminators in any of the following ways:.
Using the -t switch to specify the field terminator for all the fields except the last indicateur option binaire en ligne in the row and using the -r switch to specify a row terminator. If you specify the -n native data or -N Unicode native switch, terminators are not inserted. If an interactive bcp command contains the in or indicateur option binaire en ligne option without either the format file switch -f or a data-format switch -n-c-wor -Nand you have chosen not to specify prefix length and field length, the command prompts for the field terminator of each field, with a default of none:.
Generally, the default is a suitable choice. However, for char or nchar data fields, see the following subsection, "Guidelines for Using Terminators. After you interactively specify all of the fields in a bcp command, the command prompts you save your responses for each field in a non-XML format file.
In some situations, a terminator is useful for a char or nchar data field. For a data column that contains a null value in a data file that will be imported into a program that does not understand the prefix length information. Any data column that contains a null value is considered variable length. In the absence of prefix lengths, a terminator is necessary to identify the end of a null field, making sure that the data is correctly interpreted. In this situation, specifying a terminator can minimize storage space allowing the field to be treated as a variable-length field.
This example bulk exports the data from the AdventureWorks. Department table to the Department-c-t. For more information, see bcp Utility. The fields are separated by a comma. When you bulk import char or nchar data, the bulk-import command must recognize the terminators that are used in the data file.
How terminators can be specified depends on the bulk-import command, as follows:. Specifying terminators for an import operation uses the same syntax indicateur option binaire en ligne for an export operation. For more information, see "Specifying Terminators for Bulk Export," earlier in this topic. Terminators can be specified for individual fields in a format file or for the whole data file by using the qualifiers shown in the following table.
If a character data file uses a non-default terminator, it must be defined in the format file. The examples in this section bulk import character data form the Department-c-t.
Before you can run the examples, you must create this table. The following example bulk imports the Department-c-t. This command uses the same command switches as the bulk export command. The feedback system for this content will be changing soon. Old comments will not be carried over.
If content within a comment thread is important to you, please save a copy. For more information on the upcoming change, we invite you to read our blog post. Important When you use native or Unicode native format, use length prefixes rather than field terminators. Important If a terminator character occurs within the data, it is interpreted as a terminator, not as data, and the data after that character is interpreted as belonging to the next field or record.
Note If you specify the -n native data or -N Unicode native switch, terminators are not inserted. Note After you interactively specify all of the fields in a bcp command, the command prompts you save your responses for each field in a non-XML format file.
Note The feedback system for this content will be changing soon. Any printable character control characters are not printable, except null, tab, newline, and carriage return. String of up to 10 printable characters, including some or all of the terminators listed earlier.
Specifies the row terminator as a newline character. This is the default indicateur option binaire en ligne terminator, so specifying it is optional. Specifies that the bcp utility connects to SQL Server with a trusted connection using integrated security. If -T is not indicateur option binaire en ligne, you need to specify -U and -P to successfully log in. Specifies the field terminator to be used for character and Unicode character data files.
Specifies the row terminator to be used for character and Unicode character data files.