![]() | testview | CREATE ALGORITHM=MERGE SQL SECURITY DEFINER VIEW `testview` AS select `dispatches_data`.`ProductName` AS `ProductName`,`dispatches_data`.`CustomerName` AS `CustomerName`,`dispatches_data`.`DispatchTimeStamp` AS `DispatchTimeStamp`,`dispatches_data`.`Price` AS `Price`,`dispatches_data`. In MYSQL, the ALTER VIEW statement is used to modify or update the already created VIEW without dropping it. If you retrieve the definition of the above created view after altering the table you can observe the name of the algorithm − CREATE VIEW useraddress AS SELECT address, address1 FROM users MySQL Update VIEW. ![]() Mysql> ALTER ALGORITHM=MERGE VIEW testView AS SELECT * FROM dispatches_data | testview | CREATE ALGORITHM=UNDEFINED SQL SECURITY DEFINER VIEW `testview` AS select `dispatches_data`.`ProductName` AS `ProductName`,`dispatches_data`.`CustomerName` AS `CustomerName`,`dispatches_data`.`DispatchTimeStamp` AS `DispatchTimeStamp`,`dispatches_data`.`Price` AS `Price`,`dispatches_data`.`Location` AS `Location` from `dispatches_data` | cp850 | cp850_general_ci |įollowing query alters the ALGORITHM of the table − | View | Create View | character_set_client | collation_connection | You can retrieve the definition of the above created view using the SHOW CREATE VIEW statement as shown below − c1 INT NOT NULL) Query OK, 0 rows affected (0.11 sec) mysql> INSERT INTO t1 (c1) VALUES. Mysql> CREATE VIEW testView AS SELECT * FROM dispatches_data An overview of the usage of CREATE VIEW for the TiDB database. Insert into dispatches_data values('Headset', 'Jalaja', TIMESTAMP('', '10:49:27'), 6000, 'Goa') Īssume we have created a view using the CREATE VIEW statement as shown below − Insert into dispatches_data values('Earphones', 'Roja', TIMESTAMP('', '14:13:12'), 2000, 'Vishakhapatnam') Suppose we have created a table named dispatches_data with 5 records in it using the following queries − Where, name is the name of the view for which you need the CREATE statement. ![]() Syntaxįollowing is the syntax of the ALTER VIEW Statement The MySQL SHOW CREATE VIEW Statement displays the CREATE VIEW statement used to create the specified view. It is stored in the database with an associated name. Let’s take some examples of using the create view statement.A MySQL view is a composition of a table in the form of a predefined SQL query. Here is an example of using CREATE VIEW statement to create a view in MySQL: CREATE VIEW stockvw AS SELECT product, qt FROM stock WHERE category 'Cosmetic' This query will create a virtual table based on the results of the SELECT statement. In case you want to use different column names, you can explicitly specify them in parentheses after the view name. The view uses the select list of the select statement for its column names. Finally, specify a select statement following the as keyword.Note that you cannot use the if not exists and or replace clauses at the same time. Third, specify the if not exists clause to conditionally create a view only if the view does not exist.Second, use the or replace clause if you want to overwrite an existing view if the view that you are creating already exists.First, specify the name of the view that you want to create after the create view keywords.In this countryinfo view, we explicitly specified column names of the view after the view name. View view_nameĬode language: SQL (Structured Query Language) ( sql ) A) Creating a view based on multiple tables.
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