Best answer: What is the purpose of view in MySQL give example?

What is the purpose of view in MySQL?

MySQL supports views, including updatable views. Views are stored queries that when invoked produce a result set. A view acts as a virtual table. The following discussion describes the syntax for creating and dropping views, and shows some examples of how to use them.

What is view in MySQL with example?

A view is a database object that has no values. Its contents are based on the base table. It contains rows and columns similar to the real table. In MySQL, the View is a virtual table created by a query by joining one or more tables.

What is the purpose of views in database?

A database view is a subset of a database and is based on a query that runs on one or more database tables. Database views are saved in the database as named queries and can be used to save frequently used, complex queries. There are two types of database views: dynamic views and static views.

What is advantage of view describe?

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. Views can hide the complexity of data.

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What triggers MySQL?

A trigger in MySQL is a set of SQL statements that reside in a system catalog. It is a special type of stored procedure that is invoked automatically in response to an event. Each trigger is associated with a table, which is activated on any DML statement such as INSERT, UPDATE, or DELETE.

How can I see all views in MySQL?

To show the views of a database, you use the tables table from the INFORMATION_SCHEMA .

MySQL Show View – using INFORMATION_SCHEMA database

  1. The table_schema column stores the schema or database of the view (or table).
  2. The table_name column stores the name of the view (or table).

How do you display in SQL?

The DISPLAY command must be placed immediately after the query statement on which you want it to take effect. For example: SELECT pno, pname FROM part WHERE color=’BLUE’; DISPLAY; When the system encounters this DISPLAY command, it displays the Result window containing the part number and name for all blue parts.

What is the correct definition of view?

(Entry 1 of 2) 1 : extent or range of vision : sight tried to keep the ship in view sat high in the bleachers to get a good view. 2 : the act of seeing or examining : inspection also : survey a view of English literature. 3a : a mode or manner of looking at or regarding something.

What is view and its type?

Views are used to restrict data access. A View contains no data of its own but its like window through which data from tables can be viewed or changed. … There are 2 types of Views in SQL: Simple View and Complex View. Simple views can only contain a single base table.

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What is your view meaning?

Your views on something are the beliefs or opinions that you have about it, for example whether you think it is good, bad, right, or wrong.