创建表，并复制数据
create table table1 as select * from table2;
只创建表结构，不复制数据
create table table1 as select * from table2 where 1=2;
复制表数据，两张表字段相同：(table1必须存在)
insert into table1 select * from table2;
复制表数据，两张表字段不相同：(table1必须存在)
insert into table1(field1,field2,field3) select field1,field2,field3 from table2;
删除表：
drop talbe table_name;
删除表数据：
truncate table table_name;
如果xxx表不存在某条数据，就从xxx表插入该条数据
insert into tb_cablecheck_dtsj select od.*, '' ro_type_id from osspad.tb_cablecheck_dtsj od where not exists (select 1 from tb_cablecheck_dtsj d where d.id = od.id)
带自增长id，需要写成子查询：
INSERT INTO tb_cablecheck_dtsj SELECT
SEQ_CABLECHECK_DTSJ_ID.nextval,
t.*
FROM
(
SELECT
d.dzid,
d.dzbm,
d.sbid,
d.sbbm,
d.sblx,
d.sbmc,
d.bdsj,
d.glbh,
d.gdjgsj,
d.jcsj,
d.gxsj,
d.areaid,
d.sfpf,
d.pzgh,
d.sggh,
d.gqgh,
d.xz,
d.gdbh,
d.glmc,
d.install_dzbm,
d.install_sbbm,
d.h,
d.install_sbid,
'' ro_type_id
FROM
osspad.tb_cablecheck_dtsj d,
area a
WHERE
d.areaid = a.area_id
AND a.parent_area_id = 20
AND d.bdsj >= TO_DATE ('2016-12-01', 'yyyy-mm-dd')
AND d.bdsj <= TO_DATE ('2016-12-31', 'yyyy-mm-dd')
) t
备份原表数据
create table tb_cablecheck_equipment_bak as select * from tb_cablecheck_equipment;
删除原表
drop table tb_cablecheck_equipment;
创建临时表
create table tb_equipment_20170112 as
select e.equipment_id,
e.equipment_code,
e.equipment_name,
e.area_id,
e.address,
e.res_type_id,
e.res_type,
e.manage_area_id,
e.manage_area,
e.management_mode,
e.isrelated,
e.staff_id,
e.create_date,
e.ischecked,
e.check_date,
e.operate_staff,
e.parent_area_id,
e.grid_id,
e.install_sbid,
e.install_sbbm,
e.install_dzbm,
decode(e.longitude,null,b.longitude,e.longitude) longitude,
decode(e.latitude,null,b.latitude,e.latitude) latitude,
e.station_id,
e.update_time
from tb_cablecheck_equipment e left join tb_base_equipment b
on e.equipment_id = b.phy_eqp_id and e.equipment_code = b.point_no
恢复原表并插入数据
create table tb_cablecheck_equipment
as
select * from tb_equipment_20170112
查询原表
select * from tb_cablecheck_equipment
select count(1) from tb_cablecheck_equipment