oracle 基本查询

建表语句

序列

create sequence seq_jx
increment by 1
start with
1
nomaxvalue
nominvalue
cache 10;

字典类型表

create table sys_dict_type(
id number(20) primary key,
name varchar2(100) ,
type varchar2(100) ,
group_code varchar2(100) ,
status char(1) 
);comment on able sys_dict_type is '系统字典类型表';
comment on olumn sys_dict_type.name is '字典名称';
comment on olumn sys_dict_type.type is '字典类型编码';
comment on olumn sys_dict_type.group_code is '字典分组 (system:系统字典)';
comment on olumn sys_dict_type.status is '状态 (0:正常 1:停用)';insert into sys_dict_type values(seq_jx.nextval,'性别','gender','system','0');
insert into sys_dict_type values(seq_jx.nextval,'模块','module','system','0');

字典值表

create table sys_dict_data(
id number(20) primary key,
type varchar2(100) ,
group_code varchar2(100) ,
label varchar2(100) ,
value varchar2(100) ,
default_value char(1),
status char(1) 
);comment on able sys_dict_data is '系统字典值表';
comment on olumn sys_dict_data.type is '系统字典类型表';
comment on olumn sys_dict_data.group_code is '字典类型编码';
comment on olumn sys_dict_data.label is '字典标签';
comment on olumn sys_dict_data.value is '字典键值';
comment on olumn sys_dict_data.default_value is '是否默认值 (Y:是 N:否)';
comment on olumn sys_dict_data.status is '状态 (0:正常 1:停用)';insert into sys_dict_data values(seq_jx.nextval,'gender','system','男','male','Y','0');
insert into sys_dict_data values(seq_jx.nextval,'gender','system','女','female','N','0');insert into sys_dict_data values(seq_jx.nextval,'module','system','system','系统','N','0');
insert into sys_dict_data values(seq_jx.nextval,'module','system','auth','授权与认证','N','0');
insert into sys_dict_data values(seq_jx.nextval,'module','system','order','订单','N','0');
insert into sys_dict_data values(seq_jx.nextval,'module','system','product','商品','N','0');
insert into sys_dict_data values(seq_jx.nextval,'module','system','member','会员','N','0');
insert into sys_dict_data values(seq_jx.nextval,'module','system','pay','支付','N','0');
insert into sys_dict_data values(seq_jx.nextval,'module','system','stock','库存','N','0');
insert into sys_dict_data values(seq_jx.nextval,'module','system','cart','购物车','N','0');
insert into sys_dict_data values(seq_jx.nextval,'module','system','cms','内容管理','N','0');
insert into sys_dict_data values(seq_jx.nextval,'module','system','report','报表','N','0');
insert into sys_dict_data values(seq_jx.nextval,'module','system','promotion','促销','N','0');
insert into sys_dict_data values(seq_jx.nextval,'module','system','seller','商家','N','0');
insert into sys_dict_data values(seq_jx.nextval,'module','system','search','搜索','N','0');

分页查询

参考: Oracle中进行分页查询的三种方法

select * from (select rownum no, a.* from sys_dict_data a) where no between 1 and 5;
select * from sys_dict_data where rownum between 1 and 5;
select * from sys_dict_data where rownum < 7 minus select * from sys_dict_data where rownum < 1;

sql join 图

添加数据

插入两条数据

insert into sys_dict_type values(seq_jx.nextval,'left','left','left','0');
insert into sys_dict_data values(seq_jx.nextval,'right','right','right','right','N','0');

现在两张表的数据如下

左表

SQL> select * from sys_dict_type;ID NAME            TYPE            GROUP_CODE      STATUS
---------- --------------- --------------- --------------- ---------------1 性别            gender          system          021 模块            module          system          035 left            left            left            0SQL> 

右表

SQL> select * from sys_dict_data;ID TYPE            GROUP_CODE      LABEL           VALUE           DEFAULT_VALUE   STATUS
---------- --------------- --------------- --------------- --------------- --------------- ---------------11 gender          system          男              male            Y               012 gender          system          女              female          N               022 module          system          system          系统            N               023 module          system          auth            授权与认证      N               024 module          system          order           订单            N               025 module          system          product         商品            N               026 module          system          member          会员            N               027 module          system          pay             支付            N               028 module          system          stock           库存            N               029 module          system          cart            购物车          N               030 module          system          cms             内容管理        N               031 module          system          report          报表            N               032 module          system          promotion       促销            N               033 module          system          seller          商家            N               034 module          system          search          搜索            N               041 right           right           right           right           N               0已选择16行。SQL>

第一种

selectdistinct t1.name,t1.type,t1.group_code,t2.label,t2.value,t2.default_value
fromsys_dict_type t1
left join sys_dict_data t2
ont1.type = t2.typeand t1.group_code = t2.group_code;

第二种

selectdistinct t1.name,t1.type,t1.group_code,t2.label,t2.value,t2.default_value
fromsys_dict_type t1
left join sys_dict_data t2
ont1.type = t2.typeand t1.group_code = t2.group_code
where t2.value is not null;