expdp与impdp的相关参数（The related parameters of expdp and impdp）.docVIP

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expdp与impdp的相关参数（The related parameters of expdp and impdp）.doc

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expdp与impdp的相关参数（The related parameters of expdp and impdp）

expdp与impdp的相关参数（The related parameters of expdp and impdp） Expdp/Impdp related parameters EXPDP command line options 1. ATTACH This option is used to establish an association between the client session and the existing export function. The syntax is as follows ATTACH=[schema_name.]job_name Schema_name is used to specify the schema name, and job_name is used to specify the export job name. Note that if you use the ATTACH option, you cannot specify any other options on the command line except the connection string and the ATTACH option. Here are the examples: Expdp scott/tiger ATTACH=scott.export_job 2. CONTENT This option specifies the content to be exported. The default value is ALL CONTENT={ALL DATA_ONLY METADATA_ONLY} | | When CONTENT is set to ALL, the export object definition and all its data are exported. For DATA_ONLY, only the object data is exported. For METADATA_ONLY, only the object definitions are exported Expdp scott/tiger DIRECTORY=dump DUMPFILE=a.dump CONTENT=METADATA_ONLY 3. DIRECTORY Specifies the directory where the dump file and log file are located DIRECTORY=directory_object Directory_object is used to specify directory object names. It is important to note that the directory object is the object that is created using the CREATE DIRECTORY statement, not the OS directory Expdp scott/tiger DIRECTORY=dump DUMPFILE=a.dump Build directory: CREATE DIRECTORY dump as d:dump; The query created those subdirectories: SELECT * FROM dba_directories; 4. DUMPFILE Is used to specify the name of the dump file and the default name is expdat.dmp DUMPFILE=[directory_object:]file_name [,... . Directory_object is used to specify the directory object name, and file_name is used to specify the name of the dump file. Note that if you do not specify directory_object, the export tool will automatically use the directory object specified by the DIRECTORY option Expdp scott/tiger DIRECTORY=dump1 DUMPFILE=dump2:a.dmp 5. ESTIMATE Specifies the method of estimating the disk spa