How do you get the description of a table in Oracle?
For a list of tables in the current schema, use the Show Tables command. For a list of views in the current schema, use the Show Views command. For a list of available schemas, use the Show Schemas command. If the table or view is in a particular schema, qualify it with the schema name.
What is Oracle table definition?
Tables are the basic unit of data storage in an Oracle Database. Data is stored in rows and columns. You define a table with a table name, such as employees , and a set of columns.
What is read only table in Oracle?
In previous Oracle releases, tables could be made to appear read-only to other users by only granting the SELECT object privilege to them, but the tables remained read-write for the owner. Oracle 11g allows tables to be marked as read-only using the ALTER TABLE command.
What is describe in Oracle?
The DESCRIBE command enables you to describe objects recursively to the depth level set in the SET DESCRIBE command. You can also display the line number and indentation of the attribute or column name when an object contains multiple object types.
How do you check if a table is indexed in Oracle?
To show indexes for a particular table in Oracle use the following command: select index_name from dba_indexes where table_name=’tablename’; When showing indexes, make sure that you are giving the right .
What are table definitions in SQL?
Tables are database objects that contain all the data in a database. In tables, data is logically organized in a row-and-column format similar to a spreadsheet. Each row represents a unique record, and each column represents a field in the record.
What is meant by table definition in SQL?
Table is a collection of data, organized in terms of rows and columns. In DBMS term, table is known as relation and row as tuple.
How can you tell if a table is read only?
To identify if a table is read-only, a new column called READ_ONLY has been added to DBA_TABLES, USER_TABLES, and ALL_TABLES. This column is set to YES if the table is read-only and NO when the table is not read-only.
How do you make a table read write?
Oracle 11g allows tables to be marked as read-only using the ALTER TABLE command. ALTER TABLE table_name READ ONLY; ALTER TABLE table_name READ WRITE; Let’s create a table and make it read-only.