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TheHades0210 wrote:easy as pie
Yes, i will import a full dump export but data only that i need to import and existing db_objects and metadata on the instance should not be touch.
[oracle@localhost ~]$ impdp help=yes Import: Release 188.8.131.52.0 - Production on Mon Feb 4 19:57:10 2013 Copyright (c) 1982, 2009, Oracle and/or its affiliates. All rights reserved. The Data Pump Import utility provides a mechanism for transferring data objects between Oracle databases. The utility is invoked with the following command: Example: impdp scott/tiger DIRECTORY=dmpdir DUMPFILE=scott.dmp You can control how Import runs by entering the 'impdp' command followed by various parameters. To specify parameters, you use keywords: Format: impdp KEYWORD=value or KEYWORD=(value1,value2,...,valueN) Example: impdp scott/tiger DIRECTORY=dmpdir DUMPFILE=scott.dmp USERID must be the first parameter on the command line. ------------------------------------------------------------------------------ The available keywords and their descriptions follow. Default values are listed within square brackets. ATTACH Attach to an existing job. For example, ATTACH=job_name. CLUSTER Utilize cluster resources and distribute workers across the Oracle RAC. Valid keyword values are: [Y] and N. CONTENT Specifies data to load. Valid keywords are: [ALL], DATA_ONLY and METADATA_ONLY. DATA_OPTIONS Data layer option flags. Valid keywords are: SKIP_CONSTRAINT_ERRORS. DIRECTORY Directory object to be used for dump, log and SQL files. DUMPFILE List of dump files to import from [expdat.dmp]. For example, DUMPFILE=scott1.dmp, scott2.dmp, dmpdir:scott3.dmp. ENCRYPTION_PASSWORD Password key for accessing encrypted data within a dump file. Not valid for network import jobs. ESTIMATE Calculate job estimates. Valid keywords are: [BLOCKS] and STATISTICS. EXCLUDE Exclude specific object types. For example, EXCLUDE=SCHEMA:"='HR'". FLASHBACK_SCN SCN used to reset session snapshot. FLASHBACK_TIME Time used to find the closest corresponding SCN value. FULL Import everything from source [Y]. HELP Display help messages [N]. INCLUDE Include specific object types. For example, INCLUDE=TABLE_DATA. JOB_NAME Name of import job to create. LOGFILE Log file name [import.log]. NETWORK_LINK Name of remote database link to the source system. NOLOGFILE Do not write log file [N]. PARALLEL Change the number of active workers for current job. PARFILE Specify parameter file. PARTITION_OPTIONS Specify how partitions should be transformed. Valid keywords are: DEPARTITION, MERGE and [NONE]. QUERY Predicate clause used to import a subset of a table. For example, QUERY=employees:"WHERE department_id > 10". REMAP_DATA Specify a data conversion function. For example, REMAP_DATA=EMP.EMPNO:REMAPPKG.EMPNO. REMAP_DATAFILE Redefine data file references in all DDL statements. REMAP_SCHEMA Objects from one schema are loaded into another schema. REMAP_TABLE Table names are remapped to another table. For example, REMAP_TABLE=HR.EMPLOYEES:EMPS. REMAP_TABLESPACE Tablespace objects are remapped to another tablespace. REUSE_DATAFILES Tablespace will be initialized if it already exists [N]. SCHEMAS List of schemas to import. SERVICE_NAME Name of an active Service and associated resource group to constrain Oracle RAC resources. SKIP_UNUSABLE_INDEXES Skip indexes that were set to the Index Unusable state. SOURCE_EDITION Edition to be used for extracting metadata. SQLFILE Write all the SQL DDL to a specified file. STATUS Frequency (secs) job status is to be monitored where the default  will show new status when available. STREAMS_CONFIGURATION Enable the loading of Streams metadata TABLE_EXISTS_ACTION Action to take if imported object already exists. Valid keywords are: APPEND, REPLACE, [SKIP] and TRUNCATE. TABLES Identifies a list of tables to import. For example, TABLES=HR.EMPLOYEES,SH.SALES:SALES_1995. TABLESPACES Identifies a list of tablespaces to import. TARGET_EDITION Edition to be used for loading metadata. TRANSFORM Metadata transform to apply to applicable objects. Valid keywords are: OID, PCTSPACE, SEGMENT_ATTRIBUTES and STORAGE. TRANSPORTABLE Options for choosing transportable data movement. Valid keywords are: ALWAYS and [NEVER]. Only valid in NETWORK_LINK mode import operations. TRANSPORT_DATAFILES List of data files to be imported by transportable mode. TRANSPORT_FULL_CHECK Verify storage segments of all tables [N]. TRANSPORT_TABLESPACES List of tablespaces from which metadata will be loaded. Only valid in NETWORK_LINK mode import operations. VERSION Version of objects to import. Valid keywords are: [COMPATIBLE], LATEST or any valid database version. Only valid for NETWORK_LINK and SQLFILE. ------------------------------------------------------------------------------ The following commands are valid while in interactive mode. Note: abbreviations are allowed. CONTINUE_CLIENT Return to logging mode. Job will be restarted if idle. EXIT_CLIENT Quit client session and leave job running. HELP Summarize interactive commands. KILL_JOB Detach and delete job. PARALLEL Change the number of active workers for current job. START_JOB Start or resume current job. Valid keywords are: SKIP_CURRENT. STATUS Frequency (secs) job status is to be monitored where the default  will show new status when available. STOP_JOB Orderly shutdown of job execution and exits the client. Valid keywords are: IMMEDIATE.
If you want to drop the schema, then yes, you can use:
drop user <your_schema_here> cascade;
You need to make sure you are a privileged user. If an unprivileged user exported their objects, then the "user" object is not part of the dumpfile. You need to be prived to get that object. Also, only Data Pump exports the user object in a schema mode export.
ex: expdp unprived_user/pwd directory=dpump_dir dumpfile=mydump.dmp
This would not get the user object so before the import, you need to create the user before running the import.
ex: expdp prived_user/pwd directory=dpump_dir dumpfile=user1.dmp schemas=user1
This would export the user1 user object and during import, you do not have to pre-create the user, it will be created as part of the import command.
Hope this helps.