Dbms_stats Import and Export schema-level statistics are used in Oracle databases using the CBO optimizer mode. statistics are an important basis for CBO to generate the best execution plan. These statistics usually include column-level, table-level,
In Oracle databases using the CBO optimizer mode, statistical information is an important basis for CBO to generate the best execution plan. These statistics usually include column-level, table-level, index, and system-level statistics. All such
I'm guessing there's a lot of friends out there. Oracle Data Pump Export import and traditional export import difference bar, the following small series for you to introduce, interested friends can not enter into a reference.
Let's take a look at
Import Export of data
Description:
Objects targeted: Import and export of data the role involved is primarily the engineering implementation personnel.
The problem to be solved is to import the required data from one database into another. 1 Tools
Let's take a look at the Oracle data pump Export Import Example
1, first set up a directory:
Create directory directory name as ' a directory on the database server ', such as:Create directory alias as ' d:\ server directory name ';Put the
Data pump technology is a new technology in Oracle Database 10g, which is 15-45 times faster than the original import/export (IMP,EXP) technology. The increase in speed stems from the use of parallel techniques to read and write export dump files.
To create a logical directory, the command does not create a real directory in the operating system, preferably created by an administrator such as system. Create directory Dpdata1 as ' D:\test\dump ';Second, view the Management Manager directory
This address: http://blog.csdn.net/sushengmiyan/article/details/50422102This paper mattered meters alongHibernate reads The mapping metadata for your Java model class. and generates SCHEMADDL statements. You can export them to a text file, or
Use the exp;impcommand to export and import racledata databases and execute them in the environment of the local or sqlplus.exe command. The exp command can export data from the remote database server to a local dmp file, and the imp command can
1. DIRECTORY
Specify the directory where dump files and log files are locatedDirectory=directory_objectDirectory_object is used to specify the directory object name. Note that directory objects are objects created using the Create DIRECTORY
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