#MYSQL CREATE VIEW EXAMPLES HOW TO#

If you retrieve the definition of the above created view after altering the table you can observe the name of the algorithm − 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 − Mysql> CREATE VIEW testView AS SELECT * FROM dispatches_data 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. Now imagine that we could create a table that was based on the above select statement and simply refer to it by name like any other table without having to. When I add it in the top SELECT row, the table is reduced to a single data line with one song and the count of all data rows.A MySQL view is a composition of a table in the form of a predefined SQL query.

#MYSQL CREATE VIEW EXAMPLES HOW TO#

So now I am running into the problem where and how to put my COUNT(metadata) AS count line, to get the desired result. ON t1.`metadata` = t2.`metadata` AND t1.`lastplayed` = t2.`timestamp` SELECT `metadata`, MAX(`lastplayed`) AS `timestamp` The column 'count' does not yet exist in the View, and I would like to include it via the existing SQL script that creates the View: CREATE VIEW `Music` AS View 'Music' (desired result): id metadata lastplayed count (*) I already have a View which groups the metadata, so I can see all single occurrences of the songs and when they were last played (epoch seconds). Please use the below SQL Script to create and populate the database EmployeeDB, and Gender and Employee table with the required sample data. Following simple representation shows the columns I am currently interested in: Examples to understand Views in MySQL We are going to use the following Gender and Employee table to understand the Views in MySQL. My database contains a single table with lots of different data columns.

Mysql create view examples