# edb 12 创建分区表

edb12 兼容oracle 11g

可以使用Oracle 的自动分区。

```sql
CREATE TABLE ckw_test (
  id bigserial NOT NULL,
  "name" varchar(255) NULL,
  afferent_date timestamp NOT null
)PARTITION BY RANGE (afferent_date)
INTERVAL (NUMTOYMINTERVAL(1,'MONTH'))
(
    partition part_202209 values less than('20221001')
) ;
```



普通分区转自动分区

```sql
ALTER TABLE <table_name> SET INTERVAL (<constant> | <expression>);

ALTER TABLE ckw_test  SET INTERVAL (NUMTOYMINTERVAL(1,'MONTH'))

```

自动分区单位

```sql
--年-月
NUMTOYMINTERVAL(1,'year')
NUMTOYMINTERVAL(1,'month')


--日-时-分-秒
numtodsinterval(1,'day')

```





查询分区表信息

```sql
select * from dba_tab_partitions where table_name='TCN_STAT';
SELECT * FROM ALL_TAB_PARTITIONS;   
```



分区表操作

```sql
-- 分离分区表
ALTER TABLE tcn_stat DETACH PARTITION tcn_stat_part_default;

-- 附加分区表（数据不能与分区规则冲突）

--附加分区  需要指定 分区条件
ALTER TABLE tcn_stat ATTACH PARTITION tcn_stat_part_default; 

-- 默认分区
ALTER TABLE ckw_test ATTACH PARTITION ckw_test_part_default  DEFAULT;
-- 小于2022-10-01 的数据
ALTER TABLE ckw_test ATTACH PARTITION ckw_test_part_default values less than('20221001')
-- 区间数据
ALTER TABLE ckw_test ATTACH PARTITION ckw_test_part_default VALUES from ('20190101') TO ('20190201');



-- 合并操作
select table_name,high_value,partition_name from dba_tab_partitions where table_name='t1';

alter table t1 merge partitions p2,p1 into partition p1_2;



-- 拆分分区 
-- at()  括号里为分割条件 如 '20190101'
alter table t1 split partition p1_2 at(100) into (partition p1,partition p2);



-- 删除分区 
alter table t1 drop partition p3;




-- 交换分区
--  用表test_t1 替换 t1的分区p2
create table test_t1 (id int,name varchar2(20));
alter table t1 exchange partition p2 with table test_t1;



```







快速创建分区表

```sql

--生成sql

select 'CREATE TABLE tcn_stat_algorithm_data_fltn_'||"FLT_NBR"|| ' PARTITION OF "TCN_STAT_ALGORITHM_DATA_FLTN" FOR VALUES IN (''' || "FLT_NBR"||''');' 
from (
select  distinct "FLT_NBR"::varchar from "TCN_STAT_ALGORITHM_DATA" where "FLT_DT" between '20190101' and '20191231'
EXCEPT
select high_value        from all_tab_partitions        where table_name = '"TCN_STAT_ALGORITHM_DATA_FLTN"'
)

--将上述查询结果另外开一个窗口进行执行,重复 第一步 直至 第一步查询不出结果。




-- 生成创建 分区的sql
select 'CREATE TABLE IF NOT EXISTS  t_icc_retail_price_' || LOWER(tirp.flight_no) ||
       ' PARTITION OF  t_icc_retail_price FOR VALUES IN (''' || tirp.flight_no || ''');'
from (select distinct flight_no::varchar
      from t_icc_retail_price
      where batch_date >= '2023-01-01 00:00:00'
        and batch_date <= '2023-11-30 00:00:00'
        and deleted = 0) as tirp







--执行该sql  进行数据导入  可以调整 FLT_DT 分批执行 （可以重复执行）

INSERT INTO "TCN_STAT_ALGORITHM_DATA_FLTN" ("BOOKING_DATE", "BOOKING_TIME", "RDCP", "CARRIER", "FLT_NBR", "FLT_DT", "ORIG_AIRPORT_CD", "STOPOVER", "DEST_AIRPORT_CD", "CABIN_CD", "SCLS", "ROUTE_AMOUNT", "FINAL_AMOUNT", "TICKET_NO", "TICKET_ID", "FLTN_YEAR")

SELECT "BOOKING_DATE", "BOOKING_TIME", "RDCP", "CARRIER", "FLT_NBR", "FLT_DT", "ORIG_AIRPORT_CD", "STOPOVER", "DEST_AIRPORT_CD", "CABIN_CD", "SCLS", "ROUTE_AMOUNT", "FINAL_AMOUNT", "TICKET_NO", "TICKET_ID", "FLTN_YEAR" FROM "TCN_STAT_ALGORITHM_DATA"

where "FLT_DT" between '20230101' and '20231231' 

ON CONFLICT ("FLT_NBR","TICKET_ID") DO nothing
```