为了将复杂的sql 给非技术部门的人眼使用，可以通过创建视图的方法将复杂的sql简单化。
Oracle对象教程：视图(View)创建使用，视图(View)实际上是一张或者多张表上的预定义查询，这些表称为基表。从视图中查询信息与从表中查询信息的方法完全相同。只需要简单的SELECT…FROM即可。
视图具有以下优点：
1. 可以限制用户只能通过视图检索数据。这样就可以对最终用户屏蔽建表时底层的基表。
2. 可以将复杂的查询保存为视图。可以对最终用户屏蔽一定的复杂性。
3. 限制某个视图只能访问基表中的部分列或者部分行的特定数据。这样可以实现一定的安全性。
4. 从多张基表中按一定的业务逻辑抽出用户关心的部分，形成一张虚拟表。
语法结构：创建视图
CREATE [OR REPLACE] [{FORCE|NOFORCE}] VIEW view_name
AS
SELECT查询
[WITH READ ONLY CONSTRAINT]
语法解析：
1. OR REPLACE：如果视图已经存在，则替换旧视图。
2. FORCE：即使基表不存在，也可以创建该视图，但是该视图不能正常使用，当基表创建成功后，视图才能正常使用。
3. NOFORCE：如果基表不存在，无法创建视图，该项是默认选项。
4. WITH READ ONLY：默认可以通过视图对基表执行增删改操作，但是有很多在基表上的限制(比如：基表中某列不能为空，但是该列没有出现在视图中，则不能通过视图执行insert操作)，WITH READ ONLY说明视图是只读视图，不能通过该视图进行增删改操作。现实开发中，基本上不通过视图对表中的数据进行增删改操作。
案例3：基于EMP表和DEPT表创建视图
原查询sql：
WITH liugang_01 AS
(select T.DATA_SOURCE,
T.WORK_ORDER_NO,
T.WINIT_ORDER_NO,
T.HOLDING_LOCATOR_SERNO,
T.PICKING_SUBAREA_NAME,
T.HOLDING_LOCATOR_NO,
T.PICKING_TASK_NO,
T.ITEM_SERNO,
T.MERCHANDISE_SERNO,
T.UPDATED,
ROW_NUMBER() OVER(PARTITION BY T.DATA_SOURCE, T.PICKING_TASK_NO ORDER BY T.UPDATED) RN
from XX_xx.XXXXXXXXXXXt
where T.IS_ACTIVE = 'Y'
AND T.IS_DELETE = 'N'
AND T.UPDATEDBY NOT LIKE 'winittest%'
AND T.UPDATED >= TRUNC(SYSDATE, 'MM'))
SELECT A.DATA_SOURCE,
A.PICKING_DATE,
A.PRODUCT_CLASS,
A.SI_COUNT,
A.ACT_CONSUM_HOUR,
FZ.拣选辅助工时,
R.SPLIT_RATIO 辅助工时分摊比例,
A.SI_COUNT / A.ACT_CONSUM_HOUR 效率_不含辅助,
A.SI_COUNT /
(A.ACT_CONSUM_HOUR + NVL(FZ.拣选辅助工时, 0) * NVL(R.SPLIT_RATIO, 0)) 效率_含辅助
FROM ( -- 标准任务拣选数量、耗时
SELECT DATA_SOURCE,
TRUNC(UPDATED, 'DD') PICKING_DATE,
PRODUCT_CLASS,
COUNT(ITEM_SERNO) SI_COUNT,
SUM(ACT_CONSUM_HOUR) ACT_CONSUM_HOUR
FROM ( -- 计算每个单品的拣选工时
SELECT J.DATA_SOURCE,
J.HOLDING_LOCATOR_SERNO,
J.PICKING_SUBAREA_NAME,
J.PICKING_TASK_NO,
J.ITEM_SERNO,
P.PRODUCT_CLASS,
J.UPDATED,
(J.UPDATED - J2.UPDATED) * 24 ACT_CONSUM_HOUR,
J.RN
FROM XXXX J
LEFT JOIN xxxxx.xxxxP
ON P.PRODUCT_CODE = J.MERCHANDISE_SERNO
LEFT JOIN xxxx J2
ON J2.DATA_SOURCE = J.DATA_SOURCE
AND J2.PICKING_TASK_NO = J.PICKING_TASK_NO
AND J2.RN = J.RN - 1
WHERE J.RN >= 2
AND J.PICKING_TASK_NO IS NOT NULL
and J.UPDATED - J2.UPDATED < 0.021 --剔除任务间隔超过半小时的数据
)
WHERE UPDATED < TRUNC(SYSDATE, 'DD')
-- AND ACT_CONSUM_HOUR>0
and DATA_SOURCE NOT IN ('CWM_USTX', 'CWM_UKBH', 'CWM_BEMO')
GROUP BY DATA_SOURCE, TRUNC(UPDATED, 'DD'), PRODUCT_CLASS) A
LEFT JOIN ( -- 待分摊的拣选辅助工时
SELECT TRUNC(C.FINISHED_DATE, 'DD') FINISH_DATE,
WH.WAREHOUSE_CODE_OW,
C.SU_CODE,
W.SU_NAME,
SUM(C.ACTUAL_WORKTIME) 拣选辅助工时
FROM xxxx.cccccc C
left join xxx .xxxxx WH
on WH.WAREHOUSE_VALUE = C.WAREHOUSE_CODE
LEFT JOIN BI_Dw.D_T_SU W
ON W.SU_CODE = C.SU_CODE
WHERE C.FINISHED_DATE >= TRUNC(SYSDATE, 'MM')
AND C.FINISHED_DATE < TRUNC(SYSDATE, 'DD')
AND W.SU_NAME = '订单拣选'
AND C.WORKTIME_TYPE = '辅助工时'
and C.ACTUAL_WORKTIME > 0
GROUP BY TRUNC(C.FINISHED_DATE, 'DD'),
WH.WAREHOUSE_CODE_OW,
C.WORKTIME_TYPE,
C.SU_CODE,
W.SU_NAME) FZ
ON FZ.WAREHOUSE_CODE_OW = A.DATA_SOURCE
AND FZ.FINISH_DATE = A.PICKING_DATE
LEFT JOIN ( -- 计算高位拣选量，以计算分摊比例
SELECT DATA_SOURCE,
PICKING_DATE,
SUBAREA_SIGN,
PRODUCT_CLASS,
SI_COUNT,
SUM(SI_COUNT) OVER(PARTITION BY DATA_SOURCE, PICKING_DATE) AS TOTAL_SICOUNT,
SI_COUNT / SUM(SI_COUNT) OVER(PARTITION BY DATA_SOURCE, PICKING_DATE) SPLIT_RATIO
FROM (SELECT T.DATA_SOURCE,
TRUNC(T.UPDATED, 'DD') PICKING_DATE,
L.SUBAREA_SIGN,
P.PRODUCT_CLASS,
COUNT(T.ITEM_SERNO) SI_COUNT
FROM xxxxxx T
LEFT xxxx.xxxxx WH
ON WH.WAREHOUSE_CODE_OW = T.DATA_SOURCE
LEFT JOIN xxx.qqqqq L
ON L.WAREHOUSE_CODE = WH.WAREHOUSE_VALUE
-- AND L.SUBAREA_NAME=T.PICKING_SUBAREA_NAME
AND L.LOCATOR_SERNO = T.HOLDING_LOCATOR_SERNO
AND L.IS_ACTIVE = 'Y'
AND L.IS_DELETE = 'N'
LEFT JOIN xxxx .xxxxxx P
ON P.PRODUCT_CODE = T.MERCHANDISE_SERNO
WHERE L.SUBAREA_SIGN = '存储库位'
AND T.ITEM_SERNO IS NOT NULL -- 异常拣选情况下单品条码为空
GROUP BY T.DATA_SOURCE,
TRUNC(T.UPDATED, 'DD'),
L.SUBAREA_SIGN,
P.PRODUCT_CLASS)) R
ON R.DATA_SOURCE = A.DATA_SOURCE
AND R.PICKING_DATE = A.PICKING_DATE
AND R.PRODUCT_CLASS = A.PRODUCT_CLASS
ORDER BY A.DATA_SOURCE, A.PICKING_DATE, A.PRODUCT_CLASS
此SQL 用了临时表，在创建视图的时候需要先把这个sql的结果集取到之后才能创建视图，那么就需要在这个sql外面在包一层 select * from ( 。。查询的SQL。。)；视图创建如下：
create view bi_wdddx.qssssuery_efficiency as select * from (
WITH ssss AS
(select T.DATA_SOURCE,
T.WORK_ORDER_NO,
T.WINIT_ORDER_NO,
T.HOLDING_LOCATOR_SERNO,
T.PICKING_SUBAREA_NAME,
T.HOLDING_LOCATOR_NO,
T.PICKING_TASK_NO,
T.ITEM_SERNO,
T.MERCHANDISE_SERNO,
T.UPDATED,
ROW_NUMBER() OVER(PARTITION BY T.DATA_SOURCE, T.PICKING_TASK_NO ORDER BY T.UPDATED) RN
from xxxx.sssssdf t
where T.IS_ACTIVE = 'Y'
AND T.IS_DELETE = 'N'
AND T.UPDATEDBY NOT LIKE 'winittest%'
AND T.UPDATED >= TRUNC(SYSDATE, 'MM'))
SELECT A.DATA_SOURCE,
A.PICKING_DATE,
A.PRODUCT_CLASS,
A.SI_COUNT,
A.ACT_CONSUM_HOUR,
FZ.拣选辅助工时,
R.SPLIT_RATIO 辅助工时分摊比例,
A.SI_COUNT / A.ACT_CONSUM_HOUR 效率_不含辅助,
A.SI_COUNT /
(A.ACT_CONSUM_HOUR + NVL(FZ.拣选辅助工时, 0) * NVL(R.SPLIT_RATIO, 0)) 效率_含辅助
FROM ( -- 标准任务拣选数量、耗时
SELECT DATA_SOURCE,
TRUNC(UPDATED, 'DD') PICKING_DATE,
PRODUCT_CLASS,
COUNT(ITEM_SERNO) SI_COUNT,
SUM(ACT_CONSUM_HOUR) ACT_CONSUM_HOUR
FROM ( -- 计算每个单品的拣选工时
SELECT J.DATA_SOURCE,
J.HOLDING_LOCATOR_SERNO,
J.PICKING_SUBAREA_NAME,
J.PICKING_TASK_NO,
J.ITEM_SERNO,
P.PRODUCT_CLASS,
J.UPDATED,
(J.UPDATED - J2.UPDATED) * 24 ACT_CONSUM_HOUR,
J.RN
FROM xxxxxx J
LEFT JOIN xxxxx.ssssss P
ON P.PRODUCT_CODE = J.MERCHANDISE_SERNO
LEFT JOIN xxxxx J2
ON J2.DATA_SOURCE = J.DATA_SOURCE
AND J2.PICKING_TASK_NO = J.PICKING_TASK_NO
AND J2.RN = J.RN - 1
WHERE J.RN >= 2
AND J.PICKING_TASK_NO IS NOT NULL
and J.UPDATED - J2.UPDATED < 0.021 --剔除任务间隔超过半小时的数据
)
WHERE UPDATED < TRUNC(SYSDATE, 'DD')
-- AND ACT_CONSUM_HOUR>0
and DATA_SOURCE NOT IN ('CWM_USTX', 'CWM_UKBH', 'CWM_BEMO')
GROUP BY DATA_SOURCE, TRUNC(UPDATED, 'DD'), PRODUCT_CLASS) A
LEFT JOIN ( -- 待分摊的拣选辅助工时
SELECT TRUNC(C.FINISHED_DATE, 'DD') FINISH_DATE,
WH.WAREHOUSE_CODE_OW,
C.SU_CODE,
W.SU_NAME,
SUM(C.ACTUAL_WORKTIME) 拣选辅助工时
FROM xxxx.sssss C
left join xxxxx WH
on WH.WAREHOUSE_VALUE = C.WAREHOUSE_CODE
LEFT JOIN sssss W
ON W.SU_CODE = C.SU_CODE
WHERE C.FINISHED_DATE >= TRUNC(SYSDATE, 'MM')
AND C.FINISHED_DATE < TRUNC(SYSDATE, 'DD')
AND W.SU_NAME = '订单拣选'
AND C.WORKTIME_TYPE = '辅助工时'
and C.ACTUAL_WORKTIME > 0
GROUP BY TRUNC(C.FINISHED_DATE, 'DD'),
WH.WAREHOUSE_CODE_OW,
C.WORKTIME_TYPE,
C.SU_CODE,
W.SU_NAME) FZ
ON FZ.WAREHOUSE_CODE_OW = A.DATA_SOURCE
AND FZ.FINISH_DATE = A.PICKING_DATE
LEFT JOIN ( -- 计算高位拣选量，以计算分摊比例
SELECT DATA_SOURCE,
PICKING_DATE,
SUBAREA_SIGN,
PRODUCT_CLASS,
SI_COUNT,
SUM(SI_COUNT) OVER(PARTITION BY DATA_SOURCE, PICKING_DATE) AS TOTAL_SICOUNT,
SI_COUNT / SUM(SI_COUNT) OVER(PARTITION BY DATA_SOURCE, PICKING_DATE) SPLIT_RATIO
FROM (SELECT T.DATA_SOURCE,
TRUNC(T.UPDATED, 'DD') PICKING_DATE,
L.SUBAREA_SIGN,
P.PRODUCT_CLASS,
COUNT(T.ITEM_SERNO) SI_COUNT
FROM cccccT
LEFT JOIN xcxcccx WH
ON WH.WAREHOUSE_CODE_OW = T.DATA_SOURCE
LEFT JOIN csacsacsa L
ON L.WAREHOUSE_CODE = WH.WAREHOUSE_VALUE
-- AND L.SUBAREA_NAME=T.PICKING_SUBAREA_NAME
AND L.LOCATOR_SERNO = T.HOLDING_LOCATOR_SERNO
AND L.IS_ACTIVE = 'Y'
AND L.IS_DELETE = 'N'
LEFT JOIN assadsadsa P
ON P.PRODUCT_CODE = T.MERCHANDISE_SERNO
WHERE L.SUBAREA_SIGN = '存储库位'
AND T.ITEM_SERNO IS NOT NULL -- 异常拣选情况下单品条码为空
GROUP BY T.DATA_SOURCE,
TRUNC(T.UPDATED, 'DD'),
L.SUBAREA_SIGN,
P.PRODUCT_CLASS)) R
ON R.DATA_SOURCE = A.DATA_SOURCE
AND R.PICKING_DATE = A.PICKING_DATE
AND R.PRODUCT_CLASS = A.PRODUCT_CLASS
ORDER BY A.DATA_SOURCE, A.PICKING_DATE, A.PRODUCT_CLASS)
可以设置条件的视图：
CREATE OR REPLACE VIEW QUERY_EFFICIENCY AS
select "DATA_SOURCE","PICKING_DATE","PRODUCT_CLASS","SI_COUNT","ACT_CONSUM_HOUR","拣选辅助工时","辅助工时分摊比例","效率_不含辅助","效率_含辅助" from (
WITH ssss AS
(select T.DATA_SOURCE,
T.WORK_ORDER_NO,
T.WINIT_ORDER_NO,
T.HOLDING_LOCATOR_SERNO,
T.PICKING_SUBAREA_NAME,
T.HOLDING_LOCATOR_NO,
T.PICKING_TASK_NO,
T.ITEM_SERNO,
T.MERCHANDISE_SERNO,
T.UPDATED,
ROW_NUMBER() OVER(PARTITION BY T.DATA_SOURCE, T.PICKING_TASK_NO ORDER BY T.UPDATED) RN
from fdsafdsgfds t
where T.IS_ACTIVE = 'Y'
AND T.IS_DELETE = 'N'
AND T.UPDATEDBY NOT LIKE 'winittest%'
AND T.UPDATED >= TRUNC(SYSDATE, 'MM'))
SELECT A.DATA_SOURCE,
A.PICKING_DATE,
A.PRODUCT_CLASS,
A.SI_COUNT,
A.ACT_CONSUM_HOUR,
FZ.拣选辅助工时,
R.SPLIT_RATIO 辅助工时分摊比例,
A.SI_COUNT / A.ACT_CONSUM_HOUR 效率_不含辅助,
A.SI_COUNT /
(A.ACT_CONSUM_HOUR + NVL(FZ.拣选辅助工时, 0) * NVL(R.SPLIT_RATIO, 0)) 效率_含辅助
FROM ( -- 标准任务拣选数量、耗时
SELECT DATA_SOURCE,
TRUNC(UPDATED, 'DD') PICKING_DATE,
PRODUCT_CLASS,
COUNT(ITEM_SERNO) SI_COUNT,
SUM(ACT_CONSUM_HOUR) ACT_CONSUM_HOUR
FROM ( -- 计算每个单品的拣选工时
SELECT J.DATA_SOURCE,
J.HOLDING_LOCATOR_SERNO,
J.PICKING_SUBAREA_NAME,
J.PICKING_TASK_NO,
J.ITEM_SERNO,
P.PRODUCT_CLASS,
J.UPDATED,
(J.UPDATED - J2.UPDATED) * 24 ACT_CONSUM_HOUR,
J.RN
FROM ssadsad J
LEFT JOIN fdsfdsfds P
ON P.PRODUCT_CODE = J.MERCHANDISE_SERNO
LEFT JOIN fddsfds J2
ON J2.DATA_SOURCE = J.DATA_SOURCE
AND J2.PICKING_TASK_NO = J.PICKING_TASK_NO
AND J2.RN = J.RN - 1
WHERE J.RN >= 2
AND J.PICKING_TASK_NO IS NOT NULL
and J.UPDATED - J2.UPDATED < 0.021 --剔除任务间隔超过半小时的数据
)
WHERE UPDATED < TRUNC(SYSDATE, 'DD')
-- AND ACT_CONSUM_HOUR>0
and DATA_SOURCE NOT IN ('CWM_USTX', 'CWM_UKBH', 'CWM_BEMO')
GROUP BY DATA_SOURCE, TRUNC(UPDATED, 'DD'), PRODUCT_CLASS) A
LEFT JOIN ( -- 待分摊的拣选辅助工时
SELECT TRUNC(C.FINISHED_DATE, 'DD') FINISH_DATE,
WH.WAREHOUSE_CODE_OW,
C.SU_CODE,
W.SU_NAME,
SUM(C.ACTUAL_WORKTIME) 拣选辅助工时
FROM safdsafdsfds C
left join sdfdsfdsfdsf WH
on WH.WAREHOUSE_VALUE = C.WAREHOUSE_CODE
LEFT JOIN BI_Dw.D_T_SU W
ON W.SU_CODE = C.SU_CODE
WHERE C.FINISHED_DATE >= TRUNC(SYSDATE, 'MM')
AND C.FINISHED_DATE < TRUNC(SYSDATE, 'DD')
AND W.SU_NAME = '订单拣选'
AND C.WORKTIME_TYPE = '辅助工时'
and C.ACTUAL_WORKTIME > 0
GROUP BY TRUNC(C.FINISHED_DATE, 'DD'),
WH.WAREHOUSE_CODE_OW,
C.WORKTIME_TYPE,
C.SU_CODE,
W.SU_NAME) FZ
ON FZ.WAREHOUSE_CODE_OW = A.DATA_SOURCE
AND FZ.FINISH_DATE = A.PICKING_DATE
LEFT JOIN ( -- 计算高位拣选量，以计算分摊比例
SELECT DATA_SOURCE,
PICKING_DATE,
SUBAREA_SIGN,
PRODUCT_CLASS,
SI_COUNT,
SUM(SI_COUNT) OVER(PARTITION BY DATA_SOURCE, PICKING_DATE) AS TOTAL_SICOUNT,
SI_COUNT / SUM(SI_COUNT) OVER(PARTITION BY DATA_SOURCE, PICKING_DATE) SPLIT_RATIO
FROM (SELECT T.DATA_SOURCE,
TRUNC(T.UPDATED, 'DD') PICKING_DATE,
L.SUBAREA_SIGN,
P.PRODUCT_CLASS,
COUNT(T.ITEM_SERNO) SI_COUNT
FROM dsafdfds T
LEFT JOIN dfsds.fds WH
ON WH.WAREHOUSE_CODE_OW = T.DATA_SOURCE
LEFT JOIN sdfdf .fdsfds L
ON L.WAREHOUSE_CODE = WH.WAREHOUSE_VALUE
-- AND L.SUBAREA_NAME=T.PICKING_SUBAREA_NAME
AND L.LOCATOR_SERNO = T.HOLDING_LOCATOR_SERNO
AND L.IS_ACTIVE = 'Y'
AND L.IS_DELETE = 'N'
LEFT JOIN fdsds.dfdsfds P
ON P.PRODUCT_CODE = T.MERCHANDISE_SERNO
WHERE L.SUBAREA_SIGN = '存储库位'
AND T.ITEM_SERNO IS NOT NULL -- 异常拣选情况下单品条码为空
GROUP BY T.DATA_SOURCE,
TRUNC(T.UPDATED, 'DD'),
L.SUBAREA_SIGN,
P.PRODUCT_CLASS)) R
ON R.DATA_SOURCE = A.DATA_SOURCE
AND R.PICKING_DATE = A.PICKING_DATE
AND R.PRODUCT_CLASS = A.PRODUCT_CLASS
ORDER BY A.DATA_SOURCE, A.PICKING_DATE, A.PRODUCT_CLASS);
查询实例：
SELECT 仓库名称,
工单号,
M码,
商品规格,
ABC分类,
移入库位,
移入分区,
移入区域,
可用库存,
移库时间,
移库单品数,
操作人
FROM (select T.*, ROWNUMRN
from WMS_TRANS_WORK_CHECK_USKY_V T
WHERE 移库时间 >= TRUNC(SYSDATE - 1, 'DD')
AND 移库时间 < TRUNC(SYSDATE, 'DD')
AND 仓库名称 IN ('USKY Warehouse', 'USKY2 Warehouse', 'USKY3 Warehouse')
AND 移入区域='拣选库位'
)
WHERE RN
<= 100;