What is Oracle imp command?
You want to export files that will be imported using the original Import utility ( imp ). An example of this would be if you wanted to export data from Oracle Database 10g and then import it into an earlier database release.
How do you use IMP command?
You can let Import prompt you for parameters by entering the IMP command followed by your username/password:
- Example: IMP SCOTT/TIGER.
- Format: IMP KEYWORD=value or KEYWORD=(value1,value2,…,valueN)
- Example: IMP SCOTT/TIGER IGNORE=Y TABLES=(EMP,DEPT) FULL=N.
- or TABLES=(T1:P1,T1:P2), if T1 is partitioned table.
What is (+) in Oracle where clause?
The plus sign is Oracle syntax for an outer join. There isn’t a minus operator for joins. An outer join means return all rows from one table. Also return the rows from the outer joined where there’s a match on the join key.
What is outer join in Oracle?
Another type of join is called an Oracle RIGHT OUTER JOIN. This type of join returns all rows from the RIGHT-hand table specified in the ON condition and only those rows from the other table where the joined fields are equal (join condition is met).
What is EXP and IMP in Oracle?
Export & Import utilities in Oracle Export (exp) and import (imp) utilities are used to perform logical database backup and recovery. When exporting, database objects are dumped to a binary file which can then be imported into another Oracle database. sql at the time of database creation).
What is the difference between EXP and Expdp?
Why expdp is faster than exp (or) why Data Pump is faster than conventional export/import. Data Pump is block mode, exp is byte mode. Data Pump will do parallel execution. Export and import can be taken over the network using database links even without generating the dump file using NETWORK_LINK parameter.
What is right outer join in SQL?
A right outer join is a method of combining tables. The result includes unmatched rows from only the table that is specified after the RIGHT OUTER JOIN clause. If you are joining two tables and want the result set to include unmatched rows from only one table, use a LEFT OUTER JOIN clause or a RIGHT OUTER JOIN clause.
What is spooling in Oracle Database?
The “spool” command is used within SQL*Plus to direct the output of any query to a server-side flat file. SQL> spool /tmp/myfile.lst. Becuse the spool command interfaces with the OS layer, the spool command is commonly used within Oracle shell scripts.
What is Expdp and Impdp?
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.
Do you have to have imp _ full _ databaseprivilege to import Oracle?
However, keep in mind that if the export file was created by a user with EXP_FULL_DATABASEprivilege, then you must have IMP_FULL_DATABASEprivilege to import it. Both of these privileges are typically assigned to DBAs. Importing Objects into Your Own Schema
Which is the default mode for EXP or imp?
SCHEMAS enables a schema-mode export (import) and specifies a comma-separated list of schemas (by default, current user’s schema); only priv users can exp (imp) other user’s schemas; this is the default mode for export and network-based import;
How does the import utility in Oracle work?
Using Export Files from a Previous Oracle Release What Is the Import Utility? The Import utility reads the object definitions and table data from an Export dump file. It inserts the data objects into an Oracle database. Figure 2-1illustrates the process of importing from an Export dump file.
Can You import old style exports with EXP / imp?
Therefore, old-style exports cannot be imported with the Data Pump Import utility. The Data Pump is more effective than original exp / imp (due to parallel execition, etc), can unload into a group of files [of the specified length], however, it requires more undo space.
