show databases show all databases created
use mysql connection you use to the database
Supplementary: webstrom select which line the node can perform which line
Hierarchical representation of a database
Library ----- "----- Table" field (attribute)
show tables show all your table
desc db display field attribute table
Additions and deletions to change search database of basic statements
select *from 表名
create database to create a database library name
Create a database table matters
1, must have an id value (logical meaning must not contain the actual meaning of the ID number is not allowed and the like)
2, type defines the data type
3, auto-increment primary key to select the whole
type Type Summary
int type integer
Long bigibt (21)
Float float
Double-precision floating-point double
String varchar (16)
Text text
INNoDB table read more, write better also common
alter table operation type table name +
