Insertion, deletion and modification of database content

First, there are two ways to insert database content: 

 1. Single row insert: 

E.g: 

         use Student // run the created database

         INSERT  INTO   Authors（AuthorName，Sex，Age, Email, ）

              VALUES('Zhang San', 1, '18', '[email protected]',)

2. Multi-line insert:

E.g:

           use Student // run the created database

           INSERT  INTO   Authors（AuthorName，Sex，Age, Email, ）

           SELECT 'Zhang San', 1, '18', '[email protected]' UNION

           SELECT 'Li Si', 1, '20', '[email protected]' UNION

           SELECT 'Wang Wu', 1, '23', '[email protected]'    

2. Deletion of database content:

E.g:

        DELETE    FROM   Books    WHERE   BookCode='9875644'

3. Modification of database content:

E.g:

        UPDATE Authors SET Age =36 WHERE AuthorID=2 //Change the age of AuthorID 2 to 36