创建有主键的表：
create table test (pkey varchar(16) primary key, value varchar(10));
创建有复合（即key由多个字段联合组成）主键的表：
create table test (pkey1 varchar(16) , pkey2 varchar(16), primary key (pkey1,pkey2));
SQLite字典表：
select * from sqlite_master;
