Open mysql: mysql -hlocalhost -uroot -p123456
database operation
| operate | Order |
|---|---|
| Build database | Create database name |
| Uninstall library | Drop library name |
| Show all tables in a library | Show databases |
| Select a library to operate | Use library name |
table operation
| operate | Order |
|---|---|
| create table | create table table name (attribute char(4) PRIMARY KEY, attribute varchar(50)not null) |
| Show all tables in the library | Show tables |
| show a table | Describe table name |
| table rename operation | alter table original name rename to new name |
| Column rename operation (column is empty) | alter table table name rename column A to B data type |
| Add value (multiple values can be added) | insert into table name (field name 1, field name 2, ...) values (value 1, value 2, ...), (···), (···); |
| Delete a row of data in the table (delete the entire table when there is no where) | delete from table name where field name=value; self-increment field does not return to 0 |
| Delete the data in the table (no where), and return the auto-increment field to 0 | truncate table table name |
| drop a table | drop table table name |
| Update some data (no where, all updates) | update table name set field name 1 = value 1, field name 2 = value 2 where conditional expression |
| Modify column properties | alter table table name modify column field name type |