What is view table in SQL?

What is view table in SQL?

A VIEW in SQL Server is like a virtual table that contains data from one or multiple tables. It does not hold any data and does not exist physically in the database. Similar to a SQL table, the view name should be unique in a database.

What is a view vs table SQL?

A table consists of rows and columns to store and organized data in a structured format, while the view is a result set of SQL statements. A table is structured with columns and rows, while a view is a virtual table extracted from a database.

How do I view a SQL description?

Syntax of SQL DESCRIBE TABLE. DESCRIBE | DESC [TableName | ViewName];

How do I find the description of a table in SQL Server?

The following syntax can be used to show table information:

  1. SELECT * FROM information_schema. columns.
  2. WHERE table_name = ‘object_name’;

What is view table?

In SQL, a view is a virtual table based on the result-set of an SQL statement. A view contains rows and columns, just like a real table. The fields in a view are fields from one or more real tables in the database. A view is created with the CREATE VIEW statement.

What is view explain?

1 : to look at attentively : scrutinize, observe view an exhibit. 2a : see, watch. b : to look on in a particular light : regard doesn’t view himself as a rebel. 3 : to survey or examine mentally : consider view all sides of a question.

Which is better table or view?

A table contains data, a view is just a SELECT statement which has been saved in the database (more or less, depending on your database). The advantage of a view is that it can join data from several tables thus creating a new view of it.

Why should we use views in SQL?

Views can provide advantages over tables: Views can join and simplify multiple tables into a single virtual table. Views can act as aggregated tables, where the database engine aggregates data (sum, average etc) and presents the calculated results as part of the data.

What is describe table?

Describes either the columns in a table or the current values, as well as the default values, for the stage properties for a table. DESCRIBE can be abbreviated to DESC. ALTER TABLE , CREATE TABLE , SHOW TABLES.

How do I view table structures in SQL Developer?

To view tables:

  1. In the Connections navigator in SQL Developer, navigate to the Tables node for the schema that includes the table you want to display. If the view is in your own schema, navigate to the Tables node in your schema.
  2. Open the Tables node.
  3. Click the name of the table that you want to display.

How do I view a view in SQL Server?

In Object Explorer, expand the database that contains the view to which you want to view the properties, and then expand the Views folder. Right-click the view of which you want to view the properties and select View Dependencies. Select Objects that depend on [view name] to display the objects that refer to the view.

What is view in SQL Mcq?

This set of SQL Server Multiple Choice Questions & Answers (MCQs) focuses on “Views”. Explanation: VIEW is a virtual table, through which a selective portion of the data from one or more tables can be seen. A view do not contain data of their own. 2.

What is the view in SQL, how it is defined?

Definition of Views: i. Basically,a view is a single table derived from multiple tables or a logically representing subset of data.

  • Implementation of View: i. In SQL,the command to specify a view is CREATE VIEW.
  • Problems in updating Views:
  • How to define a view in SQL?

    In SQL, a view is a virtual table based on the result-set of an SQL statement. A view contains rows and columns, just like a real table. The fields in a view are fields from one or more real tables in the database. You can add SQL functions, WHERE, and JOIN statements to a view and present the data as if the data were coming from one single table.

    How do you show all tables in SQL?

    User Owned Tables. To see tables owned by the currently logged-in user,you can query the user_tables view.

  • User Accessible Tables. To see all tables that the current user can access,you can query the all_tables view.
  • All Database Tables.
  • DBA_TABLES and DBA_VIEWS
  • ALL_TABLES and ALL_VIEWS
  • USER_TABLES and USER_VIEWS.
  • How do you use view in SQL?

    Locate the query in Object Explorer and double-click it to run the query. Pull down the View menu in the upper left corner of the ribbon. Select SQL view to display the SQL statement corresponding to the query. Make any edits you wish to the SQL statement in the query tab.