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- Q1. How to export only ddl/metadata of a table? …
- Q2: Which memory area used by datapump process? Ans: streams_pool_size. …
- Q3: How to improve datapump performance so that export/import happens faster? Ans: …
- Q4: How to monitor status of export/import – datapump operations/jobs? …
- Q5: How to stop/start/kill datapump jobs? …
- Q6: How will you take consistent export backup? …
- Q7: How to drop constraints before import? …
Contents
- 1 Oracle 12C Datapump New Feature – LOGTIME Paramater
- 2 Do we need to create user before import during impdp?
- 3 What is the difference between exp/imp and datapump?
- 4 How do I use query clause in expdp?
- 5 What is table_exists_action option in impdp?
- 6 Information related to the topic expdp and impdp interview questions
Oracle 12C Datapump New Feature – LOGTIME Paramater
Do we need to create user before import during impdp?
If you need consistent backup for example when you do initial load using datapump for golden gate. 3.During impdp with full=y caluse , do we need to create user before import? No.User will be automatically created. 4.which memory area expdp and impdp uses mainly? Stream pool size. 5.How can you improve performance of datapump?
When does impdp create uses?
-1 The documentation states, that impdp will create uses, when the dump file contains the create user statements: If the schema you are remapping to does not already exist, the import operation creates it, provided the dump file set contains the necessary CREATE USER metadata and you are importing with enough privileges.
How to import a schema using impdp?
Start the IMPDP process for import into Destination. Create the directory for import process. 2. Copy the dump file from source to destination. 3. Start the IMPDP process for importing the schema.
What if the user performing import has ‘import full database’ privilege?
My understanding is that if the user performing import has ‘IMPORT FULL DATABASE’ privilege, it’ll create the users/schemas in the targetHOST. I granted it to ‘scott’ and tried with that too, same error. DB version: SQL*Plus: Release 11.2.0.1.0 Production on Thu Oct 24 14:27:41 2013
What are the pre and post steps before impdp?
Pre-steps before IMPDP. Start IMPDP. Post steps after IMPDP. Check the Version or Edition of Source database. (like Standard or Enterprise). 2. Check the count of objects present in Schema which needs to be backup.
What is the difference between exp/imp and datapump?
• Datapump has parallel execution but in exp/imp single stream execution. • Datapump does not support sequential media like tapes, but traditional export supports. 10.In 12c , Does IMPDP Re-create Jobs in the New Schema?
What is the difference between exp/imp and expdp/impdp?
The main difference compared to the architecture of Data Pump utility exp / imp and expdp / impdp are always run on the DB server and not on a client. Then the files will always on the server where and active an Oracle database. The advantages of the data pump is performance (eg.
What is the difference between data pump and imp?
You can connect to a Data Pump job that is currently running and dynamically alter the number of parallel processes. Data Pump will recreate the user, whereas the old imp utility required the DBA to create the user ID before importing. The Oracle docs list syntax differences between the traditional import (imp) and Data Pump (impdp):
What is the difference between concourse exp/imp and datapump?
Conventional exp/imp can utilize the client machine resource for taking the backups but, the datapump works only in server. Parallel execution is possible in datapump which is not supported in conventional exp/imp. Using the parallel option the datapump generates multiple dump files simultaneously.
What is the difference between Oracle export (EXP) and datapump (expdp)?
Difference Between ORACLE Export (exp) and Datapump (expdp) ORACLE provides two external utilities to transfer database objects from one database to another database. Traditional exports (exp /imp) are introduced before 10g. Then from 10g, ORACLE introduced datapump (expdp / impdp) as an enhancement to traditional export utility.
How do I use query clause in expdp?
QUERY CLAUSE in EXPDP Requirement – Export dump of a table from emp_tab WHERE created > sysdate -40 . Filter can be added on any column depending upon the requirement. SQL> select count (*) from “DBACLASS”.”EMP_TAB” WHERE created > sysdate -40; Now run the expdp command with parfile. We can see, 1384 rows will be exported.
EXPDP with Select Query Clause in Oracle
- 1. Create the directory if not present. create directory EXPDIR as ‘D:\ORADUMP’
- 2. We export data from last 30 new employees to expdp dump file select * from HR.EMPLOYEES WHERE created > sysdate-30;
- 3. Run the EXPDP command for export query data.
How to use query clause in expdp or impdp?
QUERY clause can be used in expdp or impdp to export/import subset of the data or data with specific conditions. Export dump of a table from emp_tab WHERE created > sysdate -40 .
What is query clause in Oracle datapump?
Query clause in oracle datapump expdp. QUERY clause can be used in expdp or impdp to export/import subset of the data or data with specific conditions. DEMO: Export dump of a table from emp_tab WHERE created > sysdate -40 . Filter can be added on any column depending upon the requirement.
How do I use where clause in SQL export?
Using the query Parameter to use WHERE Clause During Export To export part of the data of a specific object, use the query parameter. In the following example, use the query parameter to get only one row from the tbl_two table and exclude table tbl_one:
How to export data from last 30 new employees to expdp?
Create the directory if not present. 2. We export data from last 30 new employees to expdp dump file 3. Run the EXPDP command for export query data. Loading… This entry was posted in Oracle on March 12, 2021 by SandeepSingh DBA .
What is table_exists_action option in impdp?
4. TABLE_EXISTS_ACTION option in IMPDP: Action to take if imported object already exists. Valid keywords are: APPEND, REPLACE, [SKIP] and TRUNCATE. With this option ,while importing the table, if table exists in the database, then it will append the data on top the existing data in table.
How to use table_exists_action in impdp?
TABLE_EXISTS_ACTION option in IMPDP. TABLE_EXISTS_ACTION parameter is required while importing table, which is already present in the database. We can put required value, according to our requirement. Action to take if imported object already exists. Valid keywords are: APPEND, REPLACE, [SKIP] and TRUNCATE.
What action to take if imported object already exists?
Action to take if imported object already exists. Valid keywords are: APPEND, REPLACE, [SKIP] and TRUNCATE. TABLE_EXISTS_ACTION=APPEND: With this option, while importing the table, if the table exists in the database, then it will append the data on top the existing data in the table.
What is table_exists_action in SQL?
TABLE_EXISTS_ACTION Action to take if imported object already exists. Valid keywords are: APPEND, REPLACE, [SKIP] and TRUNCATE. TABLE_EXISTS_ACTION=APPEND: With this option, while importing the table, if the table exists in the database, then it will append the data on top the existing data in the table.
What is the difference between impdp and append in SQL Server?
while IMPDP, if the table exists in the database, then it will append the data on top the existing data in the table. While IMPDP, if the table exists in database, it will truncate the table and load the data.
References:
ORACLE EXP/IMP &DATAPUMP INTERVIEW QUESTIONS
Oracle Data Pump utility expdp and impdp – DBA Genesis …
Expdp Impdp Tutorial – DBACLASS DBACLASS
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Questions just answered:
What is the difference between exp/imp and expdp/impdp?
What is the difference between data pump and imp?
What is the difference between concourse exp/imp and datapump?
What is the difference between Oracle export (EXP) and datapump (expdp)?
What is the difference between exp/imp and datapump?
How to use table_exists_action in impdp?
What action to take if imported object already exists?
What is table_exists_action in SQL?
What is the difference between impdp and append in SQL Server?
What is table_exists_action option in impdp?
How to use query clause in expdp or impdp?
What is query clause in Oracle datapump?
How do I use where clause in SQL export?
How to export data from last 30 new employees to expdp?
How do I use query clause in expdp?
When does impdp create uses?
How to import a schema using impdp?
What if the user performing import has ‘import full database’ privilege?
What are the pre and post steps before impdp?
Do we need to create user before import during impdp?
expdp and impdp interview questions
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