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For non-Data Guard patch installation tutorials, refer to [Oracle] CPU/PSU patch installation detailed tutorial. Data Guard requires both Primary and Standby patches, so the steps are more complex, the main steps are as follows:1. Stop the log transmission service in Primary;2. Shut down the Standby database, patch the
Disk DirectoryDisk directory contains information about all the disks in the disk group. Disk directory information is more detailed than PST. Each disc in a disk group has an entry that is indexed by a number. The file number of disk directory is number 2nd (F2) in each disk group.The fields in Disk directory are as follows:N Disk NameN Failure Group Namen Disk Sizen Disk Free Spacen Disk creation timeMost of the information in disk directory is available in the disk header. Alterdiskgroup ...
Oracle, things are different. Oracle treats LOBs as a special type of data and cannot be manipulated in a conventional way. For example, you cannot insert a value directly into a LOB field in an INSERT statement, or you can find it with like.
The following is an example of how to use PHP's OCI functions to insert, remove, and query LOB
Starting from 10 Gb, Oracle provides more efficient Data Pump (expdp/impdp) for Data import and export. The old exp/imp can also be used, but it is not recommended. Note: expdp/impdp AND exp/imp are incompatible. In other words, exp exported files can only be imported using imp, and expdp exported files can only be imported using impdp.
Key Points of migrating 11
The following is the data Guard CPU/PSU patch installation method for a detailed analysis of the introduction, the need for friends can refer to the next
Non-Data guard patch installation tutorials refer to the [Oracle] CPU/PSU patch installation detailed tutorial, where Data
Oracle Data Warehouse creation tutorial. How to create a data warehouse, create an example, think of graduation design requirements, recently began Oracle's Warehouse modeling practice, detailed records of the graphical interface Oracle database 12C
Non-Data guard patch installation tutorials refer to the [Oracle] cpu/psu patch installation tutorial, where Data Guard requires primary and standby to be patched at the same time, so the steps are more complex and the main steps are as follows:
Stop log transport service at primary;
Close the standby database, stand
PHP migrates data from Oracle to Mysql instances. Why migration? First of all, considering the operation cost, using Mysql can save a lot of money. On the other hand, the stability and functions of Mysql are constantly improved and enhanced to meet the needs of customers.
Why migration?
First of all, considering the operation cost, using Mysql can save a lot of money. On the other hand, the stability and f
For example, there is a shortage of hard disk space in a development library recently. A new disk is added to prepare to move all the data files to the new disk.First, list the data files to be moved. The data files belong to the tablespace. The following table spaces can be used in different categories:Control FileSystem tablespaceUndo tablespaceTemporary tables
If you delete a data file in a tablespace before you oracle10g it, the file will still exist in the database data dictionary, and the file information will not be erased unless you delete the tablespace.
But starting with ORACLE10GR2, Oracle allows us to completely delete an empty file without leaving traces.
But note: If you add a file to the SYSTEM table space
1. The control file contains the data to be loaded.
First, create a test table.
SQL> showUser
USERIs"ING"
SQL>CreateTableDept
2 (deptno number (10)ConstraintDept_pkPrimaryKey,
3 dname varchar2 (20 ),
4 loc varchar2 (20 ));
The table has been created.
Create a control file (including the loaded data)
[Oracle @ linux sqlldr] $ pwd
/U01/sqlldr
[
If you delete a data file in a tablespace before Oracle10g, the file will still exist in the Database Data Dictionary. Unless you delete the tablespace, the file information will not be cleared.
However, from oracle10gr2, Oracle allows us to completely delete an empty file without any trace.
But note: if you wantSystemIf a file is added incorrectly in the t
I deleted the database by mistake. The boss was very upset. I had to recover the database within 30 minutes. In a hurry, I wrote a stored procedure, which is suitable for deleting the table on the day of recovery without remembering the table name.
I deleted the database by mistake. The boss was very upset. I had to recover the database within 30 minutes. In a hurry, I wrote a stored procedure, which is suitable for deleting the table on the day of recovery without remembering the table name.
Non-Data guard patch installation tutorials refer to the [Oracle] CPU/PSU patch installation detailed tutorial, where Data Guard requires primary and standby to be patched at the same time, so the steps are more complex and the main steps are as follows:
1. Stop log transfer service in primary;
2. Close the standby dat
Move data objects between tablespaces
I. BASIC script
Moving objects between tablespaces in the Oracle database involves multiple types of data objects.Move Table:
AlterTableT_aMoveTablespace tbs_a;
Mobile index:
AlterIndexI _a rebuild tablespace tbs_a;
Mobile LOBSEGMENT:
AlterTableT_aMoveLob (colume_a) storeAs(Tablespace tbs_a );
According to the actual
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