MySQL data manipulation language DML common commands

【1】 Query all data in the table ：select * from The name of the table ;

【2】 Add the data in the table 、 Delete 、 Change the operation ：
2.1 increase insert into Table name ( Name 1, Name 2……) values( The column value 1, The column value 2……)

perhaps values Followed by a semicolon without parentheses and terminators , Input after line break ：

2.2 Add data in bulk ：insert into Table name ( Column 1, Column 2……) values( The column value 1, The column value 2……),( The column value 3, The column value 4),……

2.3 Update the content （ All modified ）：update Table name set Columns to be modified = The column value

2.4 Update data （ Specify modification ）：update Table name set Column = The column value where Column = The column value
remarks ：where Indicates the selection condition , Specify which column values to modify

2.5 Update data （ Multiple modifications ）：update Table name set Column 1= The column value 1, Column 2= The column value 2 where Column = The column value ;

2.6 Update data （ Column value plus ）：update Table name set The column value = The column value +n while Column = The column value ;

【3】 Update the database login password ：
Mode one ：update user set authentication_string=password(‘ New password ’) where user=‘root’;
remarks ： The database password is stored in the database mysql Medium use In the table , You can query through visualization software , Or command line query

Password storage location ：authentication_string

perform ：update user set authentication_string=password(‘ New password ’) where user=‘root’;

Perform refresh mysql System authority related table of , It will take effect ：flush privileges;

Sign out and log back in ;

Mode two ： Environment variable set （ Not set , Need to go to mysql Of bin Catalog ）, Execute in exit state ： mysqladmin -u root password New password
remarks ： This way, , You need to remember the original password , At the same time, the end cannot be semicolon