DDL:
create:创建一个表
create table b( clob char(1) );
alter:增加已经定义的表列的分配
drop:删除一个表
desc:查看一个表的定义
DML:
selelct:
select * from b;
insert:
insert into state values('fds','fds');
update:修改已有的数据
delete:删除已有的数据
带or/and的where子句:
select a,b,c from tablename where a='111',and b='222';
select a,b,c from tablename where a='111',or b ='222';
带not的where子句
select a,b,c from tablename where a != 1;
带搜索范围的where子句
select a,b,c from tablename where b between 1 and 19;
带搜索列表的where子句
select a,b,c from tablename where a in ('1','2');
带模式搜索的where子句
select a,b,c from tablename where a like 'a%';