What is the data dictionary view for indexes?

What is the data dictionary view for indexes?

DBA view describes indexes on all tables in the database. ALL view describes indexes on all tables accessible to the user. USER view is restricted to indexes owned by the user.

What is data dictionary in Oracle database?

One of the most important parts of an Oracle database is its data dictionary, which is a read-only set of tables that provides information about the database. A data dictionary contains: Auditing information, such as who has accessed or updated various schema objects. Other general database information.

What is data dictionary view in Oracle?

The USER, ALL, and DBA, views show information about schema objects that are accessible to you, at different levels of privilege. The V$ views show performance-related information. The _PRIVS views show privilege information for different combinations of users, roles, and objects.

What Oracle data dictionary command do you use to show the structure of a database table?

SELECT table_name FROM dba_tables WHERE table_name LIKE ‘EMP%’ AND owner like ‘ROBERT%’; You can find the data dictionary tables documented in the Oracle Database 10g Reference Guide, which is part of the overall Oracle database documentation set.

What are dictionary tables in Oracle?

A data dictionary in Oracle is a collection of read-only tables that provide useful information about the database including schemas, users, privileges, and even auditing data. The values in these stored dictionaries are updated automatically by Oracle anytime a statement is executed on the server that modifies data.

How do you find the DDL of an index?

sql select dbms_metadata. get_ddl (object_type, object_name) from user_objects where object_type = ‘INDEX’ — and 2. To get all index DDL of an (non-heterogeneous) object like a table, you can use the DBMS_METADATA.

What is a data dictionary in database?

A Data Dictionary is a collection of names, definitions, and attributes about data elements that are being used or captured in a database, information system, or part of a research project. A Data Dictionary also provides metadata about data elements.

What is data dictionary used for?

Data dictionaries are used to provide detailed information about the contents of a dataset or database, such as the names of measured variables, their data types or formats, and text descriptions. A data dictionary provides a concise guide to understanding and using the data.

How do you get DDL of an index in Oracle?

Best of all, it is easy to use. You simply execute dbms_metadata. get_ddl, specify the object names, and Oracle will extract ready-to-use DDL. select dbms_metadata.

How do you get DDL of a table in Oracle?

1. Statement 1. CREATE TABLE My_Table (COLUMN1 VARCHAR2(1), COLUMN2 NUMBER(1)) Table created.
2. Statement 2. BEGIN DBMS_METADATA. SET_TRANSFORM_PARAM(DBMS_METADATA.
3. Statement 3. select DBMS_METADATA.GET_DDL(object_type, object_name) from user_objects where object_type = ‘TABLE’ and object_name = ‘MY_TABLE’

What is data dictionary explain data modeling?

A data dictionary is a collection of descriptions of the data objects or items in a data model for the benefit of programmers and others who need to refer to them. Often a data dictionary is a centralized metadata repository. This process is called data modeling and results in a picture of object relationships.

What is data dictionary in Oracle?

Data Dictionary is a part of Oracle database. Data Dictionary is a read-only set of tables that provides information about the database. The data dictionary is structured in tables and views. A data dictionary contains:

Which data dictionary tables are supported by the data dictionary gateway?

Also, certain columns in an SQL Server system table cannot be used in data dictionary processing. The gateway supports the following views and tables: No other Oracle database data dictionary tables or views are supported. If you use a view not on the list, you will receive the Oracle database error code for no more rows available.

How is the data dictionary structured in a database?

Auditing information, such as who has accessed or updated various schema objects The data dictionary is structured in tables and views, just like other database data. All the data dictionary tables and views for a given database are stored in that database’s SYSTEM tablespace.

How do I access a gateway data dictionary in Oracle?

Accessing a gateway data dictionary table or view is identical to accessing a data dictionary in an Oracle database. You issue a SQL SELECT statement specifying a database link. The Oracle database data dictionary view and column names are used to access the gateway data dictionary in an Oracle database.