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@@e:\zhaozhenlong\drop_table.sql
@@e:\zhaozhenlong\create_table.sql
      
/*
˵Ã÷£º.sqlÎļþÃû×ÖÖв»ÄÜÓпոñ£¬
      Èçcreate_table.sqlÊǺϷ¨µÄ£¬create table.sqlÊÇ·Ç·¨µÄ¡£
ÎļþÄÚÈÝ:
drop_table.sqlÎļþÄÚÈÝ£º
drop table tb_zhaozhenlong6;
drop table tb_zhaozhenlong5;
      
create_table.sqlÎļþÄÚÈÝ£º
--drop table tb_zhaozhenlong5;
create table tb_zhaozhenlong5(
       c1 varchar2(10) not null constraint pk_zhaozhenlong5 primary key,
       c2 varchar2(10) not null , 
       c3 varchar2(10) not null constraint un_zhaozhenlong5 unique, 
       c4 char(1) not null constraint ck_zhaozhenlongddd check(c4 in('0','1')) ,
       c5 char(1) not null,
       constraint un_zhaozhenlong51 unique(c1,c2),
       constraint ch_zhaozhenlong51 check(c5 in('Y','N'))
);
--drop table tb_zhaozhenlong6;
create table tb_zhaozhenlong6(
       c1 varchar2(10) not null, constraint fk_zhaozhenlong6 foreign key(c1) references tb_zhaozhenlong5(c1),
       c2 varchar2(10) not null,
     &nb


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