Answer:- In a database, the table is the first physical object. Oracle divides data into rows and columns using tables in a database. In a database, the table is the first physical object.

Answer:- A query is added to any view in order to define specific rows and columns of the table. The view is a type of virtual table. Read-only and read-write views are available types of views.

Answer:- The advantages of using a view in the table are • It is a subset of the data in table • It store complex queries • It can simplify multiple tables into one • It occupies very little space • It presents the data from different perspectives

Answer:- A tablespace is a logical storage unit that groups together similar logical structures. It is the logical structure that will organise all of the database’s objects.

Answer:- Every database in Oracle has a tablespace called SYSTEM, which is generated automatically when the database is created. It also includes a data dictionary table for the entire set of data.

Answer:- Each database has one or more tablespaces, each of which is divided into one or more data files.

Answer:- Materialized views are items that contain condensed sets of data from base tables that have been summarised, clustered, or aggregated. They’re commonly used in data centres and decision-making systems.

Answer:- The SELECT statement is used to retrieve a collection of unique values from a database table based on the conditions defined in a SQL query.

Answer:- To compare different parts, we use the LIKE operator, which functions as a database’s regex engine.

Answer:- The user will use SELECT DISTINCT to select distinct values from a database table.

Answer:- The keyword ORDER BY is used to sort the data.. It returns the sorted results to your program.

Answer:- The COUNT keyword is used to find the total number of records in a table.

Answer:- The keyword GROUP BY is an aggregate function like SUM, MULTIPLE, and so on, and without it, the sum for each individual group value cannot be determined.

Answer:- Oracle has several modes for shutting down the database 1. Normal Mode: In normal mode the database is shut down by default. It can be used when no other clause is provided. the database waits for all currently linked users to detach from the database before shutting it down and no new connections are permitted once the statement is released. The command line is SHUTDOWN NORMAL 2. Transactional Mode: Transactional mode helps to shut down the database while allowing to complete the active transactions. In this process, no new connections are allowed and this mode waits for all transactions to finish before shutting down the database. Use this command line to shut down the database SHUTDOWN TRANSACTIONAL 3. Immediate Mode: When you know a power outage is coming up fast, then you can use immediate mode. All sessions will be disconnected, all running transactions will be rolled back, the database does not wait for existing database users to disconnect until proceeding and the database will be shut down. No instance recovery is needed during this next startup. Issue the command SHUTDOWN with an IMMEDIATE clause to shut down a database immediately. SHUTDOWN IMMEDIATE 4. Abort Mode: When you want to shut down the database immediately within seconds without any active transactions then you can use this abort method. Hereafter the statement has been released, no new connections or transactions are permitted to be initiated. The Oracle database automatically terminates all current client SQL statements and does not wait for existing database users to disconnect. Transactions that have not been committed will not roll back. All linked users are automatically disconnected by the database. Use the command SHUTDOWN with ABORT clause: SHUTDOWN ABORT