开发过程中遇到的SQL优化

需求描述

对一些业务数据以报表的形式进行展示，在项目上线前统计数据不准确（忽略了节假日的统计）和查询速度慢。统计的是职员处理业务的执行率（默认发公告给你，你在正常工作日的一天之内处理就是及时处理）。

原始版本

日期格式的操作用的是to_char，导致索引没有命中，查询较慢。报表的页面引入多余的js，使得后台数据返回前台，前台加载数据的时候还要几秒。

优化后的版本

涉及到的日期格式用to_date，处理及时不及时考虑到节假日。

SELECT DECODE(TT.TASK_NUM_TOTAL, NULL, 0, TT.TASK_NUM_TOTAL) TASK_NUM_TOTAL,
DECODE(TT.TASK_NUM_COMP, NULL, 0, TT.TASK_NUM_COMP) TASK_NUM_COMP,
DECODE(TT.TASK_NUM_TIME, NULL, 0, TT.TASK_NUM_TIME) TASK_NUM_TIME,
DECODE(TT.TASK_NUM_TOTAL,
0,
0,
round((TT.TASK_NUM_TIME * 100) / TT.TASK_NUM_TOTAL, 2)) || '%' TASK_NUMBER_TIME_PERCENT,
DECODE(TT.TASK_NUM_TOTAL,
0,
0,
round((TT.TASK_NUM_TIME * 100) / TT.TASK_NUM_TOTAL, 2)) TASK_NUMBER_TIME_SCALE,
TT.FULLNAME,
TT.USERID
FROM (SELECT DECODE(T.TASK_NUM_TOTAL, NULL, 0, T.TASK_NUM_TOTAL) TASK_NUM_TOTAL,
DECODE(T.TASK_NUM_COMP, NULL, 0, T.TASK_NUM_COMP) TASK_NUM_COMP,
DECODE(T.TASK_NUM_TIME, NULL, 0, T.TASK_NUM_TIME) TASK_NUM_TIME,
V.FULLNAME,
V.USERID
FROM (SELECT A.TASK_NUM_TOTAL,
B.TASK_NUM_COMP,
C.TASK_NUM_TIME,
A.USERID
FROM (SELECT COUNT(O.TC_TASK_CONTENT_ID) TASK_NUM_TOTAL, O.TASK_HANDLE_PERSON USERID
FROM TC_TASK_CONTENT O
WHERE 1 = 1
AND O.TASK_CREATE_DATE >= TO_DATE(?, 'YYYY-MM-DD')
AND O.TASK_CREATE_DATE < TO_DATE(?, 'YYYY-MM-DD')+1

GROUP BY O.TASK_HANDLE_PERSON) A,
(SELECT COUNT(O.TC_TASK_CONTENT_ID) TASK_NUM_COMP, O.TASK_HANDLE_PERSON USERID
FROM TC_TASK_CONTENT O
WHERE O.TASK_STATE = '2'
AND O.TASK_CREATE_DATE >= TO_DATE(?, 'YYYY-MM-DD')
AND O.TASK_CREATE_DATE < TO_DATE(?, 'YYYY-MM-DD')+1

GROUP BY O.TASK_HANDLE_PERSON) B,
(SELECT COUNT(O.TC_TASK_CONTENT_ID) TASK_NUM_TIME, O.TASK_HANDLE_PERSON USERID
FROM TC_TASK_CONTENT O
WHERE O.TASK_STATE = '2'
AND O.TASK_CREATE_DATE >= TO_DATE(?, 'YYYY-MM-DD')
AND O.TASK_CREATE_DATE < TO_DATE(?, 'YYYY-MM-DD')+1

AND TRUNC(O.ACTUAL_FINISH_DATE-O.TASK_CREATE_DATE)<=1
GROUP BY O.TASK_HANDLE_PERSON) C
WHERE A.USERID = B.USERID(+)
AND B.USERID = C.USERID(+)) T,
USERS_ORGS UO,
USER_ U,
(SELECT ORGANIZATIONID
FROM ORGANIZATION_ T
CONNECT BY PRIOR T.ORGANIZATIONID = T.PARENTORGANIZATIONID
START WITH ORGANIZATIONID = '"+MapUtil.getString(inputData, "ORGANIZATIONID")+"') ORG,
V_USER_ORG V
WHERE UO.ORGANIZATIONID = ORG.ORGANIZATIONID
AND T.USERID(+) = U.USERID
AND U.USERID = UO.USERID
AND V.USERID = U.USERID
UNION ALL
SELECT SUM(DECODE(T.TASK_NUM_TOTAL, NULL, 0, T.TASK_NUM_TOTAL)) TASK_NUM_TOTAL,
SUM(DECODE(T.TASK_NUM_COMP, NULL, 0, T.TASK_NUM_COMP)) TASK_NUM_COMP,
SUM(DECODE(T.TASK_NUM_TIME, NULL, 0, T.TASK_NUM_TIME)) TASK_NUM_TIME,
'合计' FULLNAME,
111111 USERID
FROM (SELECT A.TASK_NUM_TOTAL,
B.TASK_NUM_COMP,
C.TASK_NUM_TIME,
A.USERID
FROM (SELECT COUNT(O.TC_TASK_CONTENT_ID) TASK_NUM_TOTAL, O.TASK_HANDLE_PERSON USERID
FROM TC_TASK_CONTENT O
WHERE 1 = 1
AND O.TASK_CREATE_DATE >= TO_DATE(?, 'YYYY-MM-DD')
AND O.TASK_CREATE_DATE < TO_DATE(?, 'YYYY-MM-DD')+1

GROUP BY O.TASK_HANDLE_PERSON) A,
(SELECT COUNT(O.TC_TASK_CONTENT_ID) TASK_NUM_COMP, O.TASK_HANDLE_PERSON USERID
FROM TC_TASK_CONTENT O
WHERE O.TASK_STATE = '2'
AND O.TASK_CREATE_DATE >= TO_DATE(?, 'YYYY-MM-DD')
AND O.TASK_CREATE_DATE < TO_DATE(?, 'YYYY-MM-DD')+1

GROUP BY O.TASK_HANDLE_PERSON) B,
(SELECT COUNT(O.TC_TASK_CONTENT_ID) TASK_NUM_TIME, O.TASK_HANDLE_PERSON USERID
FROM TC_TASK_CONTENT O
WHERE O.TASK_STATE = '2'

AND O.TASK_CREATE_DATE >= TO_DATE(?, 'YYYY-MM-DD')
AND O.TASK_CREATE_DATE < TO_DATE(?, 'YYYY-MM-DD')+1
AND TRUNC(O.ACTUAL_FINISH_DATE-O.TASK_CREATE_DATE)<=1
GROUP BY O.TASK_HANDLE_PERSON) C
WHERE A.USERID = B.USERID(+)
AND B.USERID = C.USERID(+)) T,
USERS_ORGS UO,
USER_ U,
(SELECT ORGANIZATIONID
FROM ORGANIZATION_ T
CONNECT BY PRIOR T.ORGANIZATIONID = T.PARENTORGANIZATIONID
START WITH ORGANIZATIONID = '"+MapUtil.getString(inputData, "ORGANIZATIONID")+"') ORG,
V_USER_ORG V
WHERE T.USERID(+) = U.USERID
AND U.USERID = UO.USERID
AND UO.ORGANIZATIONID = ORG.ORGANIZATIONID
AND V.USERID = U.USERID) TT

最终版本

WITH ALL_ORG AS
(SELECT ORGANIZATIONID,
DECODE(LEVEL, 2, ORGANIZATIONID, 3, T.PARENTORGANIZATIONID) THIRDID
FROM ORGANIZATION_ T
CONNECT BY PRIOR T.ORGANIZATIONID = T.PARENTORGANIZATIONID
START WITH ORGANIZATIONID = '5272'),
ORG_SUM AS
(SELECT DECODE(T.TASK_NUM_TOTAL, NULL, 0, T.TASK_NUM_TOTAL) TASK_NUM_TOTAL,
DECODE(T.TASK_NUM_COMP, NULL, 0, T.TASK_NUM_COMP) TASK_NUM_COMP,
DECODE(T.TASK_NUM_TIME, NULL, 0, T.TASK_NUM_TIME) TASK_NUM_TIME,
(SELECT OZ.NAME
FROM ORGANIZATION_ OZ
WHERE OZ.ORGANIZATIONID = T.THIRDID) FULLNAME,
T.THIRDID
FROM (SELECT A.TASK_NUM_TOTAL,
A.TASK_NUM_COMP,
A.TASK_NUM_TIME,
A.THIRDID
FROM (SELECT SUM(1) TASK_NUM_TOTAL,
SUM(CASE
WHEN TRUNC(O.ACTUAL_FINISH_DATE -
O.TASK_CREATE_DATE) <= 1 THEN
1
ELSE
0
END) TASK_NUM_TIME,
SUM(DECODE(TASK_STATE, '2', 1, 0)) TASK_NUM_COMP,
O.TASK_HANDLE_PERSON USERID, TT.THIRDID
FROM TC_TASK_CONTENT O,USERS_ORGS UO,ALL_ORG TT
WHERE O.TASK_HANDLE_PERSON = UO.USERID
AND UO.ORGANIZATIONID = TT.ORGANIZATIONID
AND TT.THIRDID IS NOT NULL
AND O.TASK_CREATE_DATE >= TO_DATE('2017-01-01', 'YYYY-MM-DD')
AND O.TASK_CREATE_DATE <
TO_DATE('2017-12-31', 'YYYY-MM-DD') + 1
GROUP BY TT.THIRDID) A) T),
OGR_ALL AS
(SELECT S.*
FROM ORG_SUM S)
SELECT DECODE(TT.TASK_NUM_TOTAL, NULL, 0, TT.TASK_NUM_TOTAL) TASK_NUM_TOTAL,
DECODE(TT.TASK_NUM_COMP, NULL, 0, TT.TASK_NUM_COMP) TASK_NUM_COMP,
DECODE(TT.TASK_NUM_TIME, NULL, 0, TT.TASK_NUM_TIME) TASK_NUM_TIME,
DECODE(TT.TASK_NUM_TOTAL,
0,
0,
ROUND((TT.TASK_NUM_TIME * 100) / TT.TASK_NUM_TOTAL, 2)) || '%' TASK_NUMBER_TIME_PERCENT,
DECODE(TT.TASK_NUM_TOTAL,
0,
0,
ROUND((TT.TASK_NUM_TIME * 100) / TT.TASK_NUM_TOTAL, 2)) TASK_NUMBER_TIME_SCALE,
TT.FULLNAME,
TT.THIRDID
FROM OGR_ALL TT

附带查询的结果图：



5. 讨论

判断某一天是否属于上班时间？知道某一天，这一天的5个工作日是几月几号？现在对于工作日的判断是将一年的日期放进表里面维护，判断5个工作后是几月几号用的是递归。感觉这样的做法很繁琐而且效率很慢，但是没有什么其他的好办法。