What is the MySQL query view command

mysql Which is the query view command

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mysql Query view command yes “DESCRIBE” perhaps “SHOW CREATE VIEW”.DESCRIBE The command can view the field information of the view , The grammar is “DESCRIBE View name ;”, It can be abbreviated as “DESC View name ;”; and “SHOW CREATE VIEW” Command to view the details of the view , The grammar is “SHOW CREATE VIEW View name ;”.

The operating environment of this tutorial ：windows7 System 、mysql8 edition 、Dell G3 The computer .

After creating the view , You can view the field information and details of the view by viewing the statement of the view .

View the field information of the view

stay mysql in , Viewing the field information of the view is the same as viewing the field information of the data table , Is to use DESCRIBE Keyword to view .

describe Keyword is used to view the detailed design information of a specific view or table, etc , grammar ：

DESCRIBE  View name ;

Or abbreviated ：

DESC  View name ;

Example 1

Now create a student information table studentinfo A view of , Used to query student names and test scores .

Create a student information table studentinfo Of SQL Statement and run results are as follows ：

CREATE TABLE studentinfo(    ID INT(11) PRIMARY KEY,    NAME VARCHAR(20),    SCORE DECIMAL(4,2),    SUBJECT VARCHAR(20),    TEACHER VARCHAR(20));

Create a view to query student names and scores as follows ：

CREATE VIEW v_studentinfo AS SELECT name,score FROM studentinfo;

adopt DESCRIBE Statement view view v_studentsinfo Field information in

DESCRIBE v_studentinfo;

Be careful ： Use DESC Implementation results and use of DESCRIBE It's the same .

It can be seen from the running results that , The format of view field content is the same as that of table field content . therefore , It can better explain that the view is actually a data table , The difference is , The data in the view comes from the existing tables in the database .

See the details of the view

stay MySQL in ,SHOW CREATE VIEW Statement to view the detailed definition of the view . The syntax is as follows ：

SHOW CREATE VIEW  View name ;

Through the above sentence , You can also view the statement that created the view . The statement that creates the view can be used as a reference for modifying or recreating the view , Convenient for users to operate .

Example 2

Use SHOW CREATE VIEW View view ,SQL The statement and run result are as follows ：

SHOW CREATE VIEW v_studentinfo \G

Above SQL Statement to \G ending , This enables the display results to be formatted . If not used \G, The results displayed will be confusing , As shown below ：

SHOW CREATE VIEW v_studentinfo;

Here we are , About “mysql Which is the query view command ” That's the end of my study , I hope we can solve your doubts . The combination of theory and practice can better help you learn , Let's try ！ If you want to continue to learn more related knowledge , Please continue to pay attention to Yisu cloud website , Xiaobian will continue to strive to bring you more practical articles ！