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Where are Oracle tables stored?
Tables are the basic unit of data storage in an Oracle Database. Data is stored in rows and columns.
How can I restore a table in Oracle?
The RECOVER TABLE command is a new feature in 12C that allows a point in time recovery of a table or a table partition. The table is recovered into an auxiliary instance and there is the option to: import the recovered table into a new table or partition using REMAP option.
What are the system tables in Oracle?
Oracle / PLSQL: Oracle System Tables
| System Table | Description |
|---|---|
| ALL_SOURCE | Current source on stored objects that user is allowed to create |
| ALL_SYNONYMS | All synonyms accessible to the user |
| ALL_TABLES | Description of relational tables accessible to the user |
| ALL_TAB_COLUMNS | Columns of user’s tables, views and clusters |
How does the import utility work in Oracle?
The Import utility reads object definitions and table data from dump files created by the original Export utility. The dump file is in an Oracle binary-format that can be read only by original Import. The version of the Import utility cannot be earlier than the version of the Export utility used to create the dump file.
What is the Order of import in Oracle?
The order of import is as follows: new tables are created, data is imported and indexes are built, triggers are imported, integrity constraints are enabled on the new tables, and any bitmap, function-based, and/or domain indexes are built. This sequence prevents data from being rejected due to the order in which tables are imported.
Why are rows not imported from EMP table?
Referential constraints between tables can also cause problems. For example, if the emp table appears before the dept table in the export dump file, but a referential check exists from the emp table into the dept table, then some of the rows from the emp table may not be imported due to a referential constraint violation.
When to re-create import parameters in Oracle?
Oracle recommends that you re-create them after the import in case they define actions that would impede progress of the import. You can invoke Import, and specify parameters by using any of the following methods: Before you use one of these methods, be sure to read the descriptions of the available parameters.