--新建表
create table table1 (id varchar(300) primary key,name varchar(200) not null);
--插入数据
insert into table1 (id,name) values('aa','bb');
insert into table1 (id,name) values('cc','dd');
--更新数据
update table1 set id='bb' where id='cc';
--删除数据
delete from table2 where id='bb';
--删除表
drop table table1;
--修改表名
alter table table1 rename to table2;
--插入数据
insert into table2 (id,name) values('bb','cc');
--表数据复制
insert into table1 (select * from table2);
--复制表结构
create table table1 as select * from table2 where 1>1;
--复制表结构和数据
create table table3 as select * from table2;
--复制指定字段
create table table4 as select id,name from table2 where 1>1;
--条件查询
select id,name, (case gender when 0 then '男' when 1 then '女' end) gender from table2;