mysql操作基本命令

查看索引 ： show index from table_name

创建索引：create index index_name on table_name(column_name)
创建唯一索引：create unique index index_name on table_name(column_name)
创建联合索引：create index index_name on table_name(column1_name,column2_name)

删除索引：drop index index_name on table_name

查看创建表语句：show create table table_name

新建表：create table table_name(

              id int not null auto_increment,
              name varchar(50) not null,
              age int not null,
              primary key(id)

      ); 

插入语句：insert into table_name(column1_name, column2_name) values (column1_value,column2_value)

清空表中信息：truncate table table_name

查看所有列：show full columns from table_name