处理此查询以加快速度
我正在努力避免那些TABLE ACCESS FULL并分析应用了正确的基数，但这些是唯一可以提高性能的东西吗？
任何额外的观点，将不胜感激。
SELECT DISTINCT
(SELECT CM.COD_USER_COMPANY FROM GCCOM_COMPANY CM WHERE SS.ID_SELLER = CM.ID_COMPANY ) AS SOCIEDAD,
SE.COD_USER AS SECTOR,
(SELECT CM.COD_USER_COMPANY FROM GCCOM_COMPANY CM WHERE SS.ID_DISTRIBUTER = CM.ID_COMPANY) AS DISTRIBUIDORA,
FROM GCGT_RE_READING_COOR_CENTER CC
INNER JOIN GCGT_RE_READING_UNIT RU ON CC.ID_CENTER = RU.ID_CENTER
INNER JOIN GCGT_WO_AREA_HIERARCHY WH ON WH.ID_PARENT_AREA = CC.ID_AREA
INNER JOIN GCGT_WO_EXECUTION_AREA WA ON WA.ID_AREA = RU.ID_AREA AND WA.ID_AREA = WH.ID_AREA
INNER JOIN GCGT_RE_ROUTE R ON R.ID_CENTER = CC.ID_CENTER AND R.ID_CENTER = RU.ID_CENTER
INNER JOIN GCGT_RE_MEA_POINT_ROUTE_HIST RHIST ON R.ID_ROUTE = RHIST.ID_ROUTE
INNER JOIN GCGT_RE_ITINERARY IT ON IT.ID_RU= RU.ID_RU AND IT.ID_ROUTE = RHIST.ID_ROUTE
INNER JOIN GCGT_RE_ITINERARY_MACRO ITM ON IT.ID_ITINERARY_MACRO = ITM.ID_MACROITINERARY
INNER JOIN GCGT_RE_MEASUREMENT_POINT MP ON MP.ID_MEASURING_POINT = RHIST.ID_MEASURING_POINT
INNER JOIN GCGT_RE_MPOINT_HIST MPHIST ON MP.ID_MEASURING_POINT = MPHIST.ID_MEASURING_POINT
INNER JOIN GCGT_ME_MEASURER ME ON ME.ID_MEASURER = MPHIST.ID_MEASURER
INNER JOIN GCGT_ME_MEA_POINT_DEVICE_HIST DEVHIST ON DEVHIST.ID_MEASURING_POINT = MPHIST.ID_MEASURING_POINT
INNER JOIN GCGT_ME_DEVICE DEV ON DEVHIST.ID_DEVICE = DEV.ID_DEVICE AND DEV.ID_DEVICE = ME.ID_DEVICE
INNER JOIN GCGT_ME_MEA_CTYPE_HIST CTHIST ON MPHIST.ID_MEASURER = CTHIST.ID_MEASURER
INNER JOIN GCCOM_SECTOR_SUPPLY SS ON SS.ID_SECTOR_SUPPLY = MP.ID_SECTOR_SUPPLY
INNER JOIN GCCOM_SECTOR SE ON SE.ID_SECTOR = SS.ID_SECTOR
INNER JOIN GCCOM_CONTRACTED_SERVICE CS ON SS.ID_SECTOR_SUPPLY = CS.ID_SECTOR_SUPPLY AND CS.ID_SECTOR_SUPPLY = MP.ID_SECTOR_SUPPLY
INNER JOIN GCCOM_COMPANY COM ON COM.ID_COMPANY = SS.ID_SELLER OR COM.ID_COMPANY = SS.ID_DISTRIBUTER
INNER JOIN GCGT_RE_READING_E RE ON RE.ID_MEASURING_POINT = MPHIST.ID_MEASURING_POINT AND RE.ID_ITINERARY = IT.ID_ITINERARY AND CTHIST.COD_USAGE_TYPE = RE.CONSUM_TYPE AND MPHIST.ID_MEASURER = RE.ID_MEASURER
INNER JOIN GCCOM_CONTRACT CO ON CS.ID_CONTRACT = CO.ID_CONTRACT
INNER JOIN GCCC_CUSTOMER CU ON CO.ID_CUSTOMER = CU.ID_CUSTOMER
INNER JOIN GCGT_ME_COMBINATION_USAGE_TYPE CUT ON MPHIST.ID_COMBINATION_USAGE_TYPE = CUT.ID_COMBINATION_USAGE_TYPE AND CUT.COD_DEVICE_TYPE = DEV.COD_DEVICE_TYPE
INNER JOIN GCGT_ME_RATE_METER RM ON RM.ID_RATE_METER = MPHIST.ID_RATE_METER
AND RM.COD_SPECIALIZATION = SE.COD_DEVELOP
INNER JOIN GCCOM_FARE FA ON RM.ID_FARE = FA.ID_FARE AND FA.ID_SECTOR = SE.ID_SECTOR
WHERE (CC.COD_GESTION IS NULL OR CC.COD_GESTION = 'TYPCLI0003')
AND (WH.COD_GESTION IS NULL OR WH.COD_GESTION = 'TYPCLI0003')
AND (WA.COD_GESTION IS NULL OR WA.COD_GESTION= 'TYPCLI0003')
AND (RU.COD_GESTION IS NULL OR RU.COD_GESTION = 'TYPCLI0003')
AND (R.COD_GESTION IS NULL OR R.COD_GESTION = 'TYPCLI0003')
AND (RM.COD_GESTION IS NULL OR RM.COD_GESTION = 'TYPCLI0003')
AND (DEV.COD_GESTION IS NULL OR DEV.COD_GESTION = 'TYPCLI0003')
AND DEV.COD_DEVICE_TYPE = 'TAPAR00001'
AND SE.COD_DEVELOP = 'SECTOR0001'
AND RHIST.INIT_DATE <= TO_DATE('20130630','YYYYMMDD')
AND (RHIST.END_DATE IS NULL OR RHIST.END_DATE >= TO_DATE('20130101','YYYYMMDD') )
AND 20130630 >= CTHIST.FROM_DATE
AND (CTHIST.TO_DATE IS NULL OR 20130101 <= CTHIST.TO_DATE)
AND 20130630 >= MPHIST.FROM_DATE
AND (MPHIST.TO_DATE IS NULL OR 20130101 <= MPHIST.TO_DATE)
AND RE.DAY BETWEEN 20130101 AND 20130630
AND 3000000 = (SELECT COM.ID_COMPANY FROM GCCOM_COMPANY COM WHERE COM.ID_COMPANY = SS.ID_SELLER)
AND 0 = (
SELECT SUM(R2.ENERGY)
FROM GCGT_RE_READING_E R2
WHERE R2.DAY BETWEEN 20130101 AND 20130630
AND R2.ID_MEASURING_POINT = RE.ID_MEASURING_POINT
AND R2.ID_MEASURER = RE.ID_MEASURER
AND R2.ORIGIN = RE.ORIGIN
AND R2.STATE <>6
AND R2.ACTIVE =1
AND R2.CONSUM_TYPE = RE.CONSUM_TYPE
AND ((R2.ORIGIN = 'TEL' AND R2.RELEVANT = 1) OR R2.ORIGIN <> 'TEL' )
)
ORDER BY CUPS;
解释计划：
我在这里附上解释计划执行，供你检查。
PLAN_TABLE_OUTPUT
------------------------------------------------------------------------------------------------------------------------------------------------------
Plan hash value: 3130792258
-----------------------------------------------------------------------------------------------------------------------------------------------------
| Id | Operation | Name | Rows | Bytes | Cost (%CPU)| Time | Pstart| Pstop |
-----------------------------------------------------------------------------------------------------------------------------------------------------
| 0 | SELECT STATEMENT | | 1 | 669 | 3888 (2)| 00:00:47 | | |
| 1 | TABLE ACCESS BY INDEX ROWID | GCCOM_COMPANY | 1 | 9 | 1 (0)| 00:00:01 | | |
|* 2 | INDEX UNIQUE SCAN | PK_GCCOM_COMPANY | 1 | | 1 (0)| 00:00:01 | | |
| 3 | TABLE ACCESS BY INDEX ROWID | GCCOM_COMPANY | 1 | 9 | 1 (0)| 00:00:01 | | |
|* 4 | INDEX UNIQUE SCAN | PK_GCCOM_COMPANY | 1 | | 1 (0)| 00:00:01 | | |
| 5 | SORT ORDER BY | | 1 | 669 | 3888 (2)| 00:00:47 | | |
| 6 | HASH UNIQUE | | 1 | 669 | 3887 (2)| 00:00:47 | | |
|* 7 | FILTER | | | | | | | |
| 8 | NESTED LOOPS | | 1 | 669 | 3884 (2)| 00:00:47 | | |
|* 18 | HASH JOIN | | 4 | 1596 | 3874 (2)| 00:00:47 | | |
|* 19 | HASH JOIN | | 17 | 6528 | 3872 (2)| 00:00:47 | | |
|* 20 | HASH JOIN | | 29 | 10121 | 3865 (2)| 00:00:47 | | |
| 21 | TABLE ACCESS BY INDEX ROWID | GCCOM_SECTOR | 1 | 18 | 1 (0)| 00:00:01 | | |
|* 22 | INDEX RANGE SCAN | IDX$$_00000002 | 1 | | 1 (0)| 00:00:01 | | |
|* 23 | HASH JOIN | | 29 | 9599 | 3864 (2)| 00:00:47 | | |
|* 24 | TABLE ACCESS BY INDEX ROWID | GCGT_ME_RATE_METER | 4 | 128 | 1 (0)| 00:00:01 | | |
|* 25 | INDEX RANGE SCAN | IDX_FK_ME_RATE_TY_RE_SPEC_01 | 23 | | 1 (0)| 00:00:01 | | |
| 26 | NESTED LOOPS | | | | | | | |
| 27 | NESTED LOOPS | | 381 | 111K| 3862 (2)| 00:00:47 | | |
| 28 | NESTED LOOPS | | 170 | 45220 | 3658 (2)| 00:00:44 | | |
| 29 | NESTED LOOPS | | 170 | 43010 | 3607 (2)| 00:00:44 | | |
|* 30 | HASH JOIN | | 1047 | 229K| 2613 (1)| 00:00:32 | | |
| 31 | NESTED LOOPS | | | | | | | |
| 32 | NESTED LOOPS | | 706 | 131K| 2255 (1)| 00:00:28 | | |
|* 33 | HASH JOIN | | 706 | 91074 | 2043 (1)| 00:00:25 | | |
|* 34 | TABLE ACCESS FULL | GCGT_WO_AREA_HIERARCHY | 348 | 8004 | 4 (0)| 00:00:01 | | |
|* 35 | HASH JOIN | | 119K| 12M| 2038 (1)| 00:00:25 | | |
|* 36 | TABLE ACCESS FULL | GCGT_WO_EXECUTION_AREA | 349 | 5933 | 5 (0)| 00:00:01 | | |
|* 37 | HASH JOIN | | 119K| 10M| 2032 (1)| 00:00:25 | | |
|* 38 | TABLE ACCESS FULL | GCGT_RE_READING_COOR_CENTER | 116 | 3364 | 4 (0)| 00:00:01 | | |
|* 39 | HASH JOIN | | 190K| 10M| 2026 (1)| 00:00:25 | | |
|* 40 | TABLE ACCESS FULL | GCGT_RE_READING_UNIT | 190 | 6840 | 5 (0)| 00:00:01 | | |
| 41 | TABLE ACCESS FULL | GCGT_RE_ITINERARY | 285K| 6689K| 2020 (1)| 00:00:25 | | |
|* 42 | INDEX UNIQUE SCAN | PK_GCGT_RE_ITINERARY_MACRO | 1 | | 1 (0)| 00:00:01 | | |
| 43 | TABLE ACCESS BY INDEX ROWID| GCGT_RE_ITINERARY_MACRO | 1 | 62 | 1 (0)| 00:00:01 | | |
|* 44 | TABLE ACCESS FULL | GCGT_RE_ROUTE | 5121 | 165K| 358 (1)| 00:00:05 | | |
|* 45 | TABLE ACCESS BY INDEX ROWID | GCGT_RE_MEA_POINT_ROUTE_HIST | 1 | 29 | 1 (0)| 00:00:01 | | |
|* 46 | INDEX RANGE SCAN | FK_RE_MEA_POINTHIST_ROUTE_01 | 4 | | 1 (0)| 00:00:01 | | |
| 47 | TABLE ACCESS BY INDEX ROWID | GCGT_RE_MEASUREMENT_POINT | 1 | 13 | 1 (0)| 00:00:01 | | |
|* 48 | INDEX UNIQUE SCAN | PK_GCGT_RE_MEASUREMENT_POINT | 1 | | 1 (0)| 00:00:01 | | |
|* 49 | INDEX RANGE SCAN | IDX_GCGT_RE_MPOINHHIST_04 | 2 | | 1 (0)| 00:00:01 | | |
| 50 | TABLE ACCESS BY INDEX ROWID | GCGT_RE_MPOINT_HIST | 2 | 66 | 1 (0)| 00:00:01 | | |
| 51 | TABLE ACCESS FULL | GCCOM_FARE | 374 | 13090 | 6 (0)| 00:00:01 | | |
| 52 | TABLE ACCESS BY INDEX ROWID | GCGT_ME_COMBINATION_USAGE_TYPE | 89 | 1335 | 1 (0)| 00:00:01 | | |
|* 53 | INDEX RANGE SCAN | IDX_FK_ME_COM_US_TY_DEV_TY_01 | 89 | | 1 (0)| 00:00:01 | | |
|* 54 | TABLE ACCESS BY GLOBAL INDEX ROWID | GCGT_RE_READING_E | 1 | 40 | 1 (0)| 00:00:01 | ROWID | ROWID |
|* 55 | INDEX RANGE SCAN | IDX$$_00000003 | 1 | | 1 (0)| 00:00:01 | | |
|* 56 | TABLE ACCESS BY INDEX ROWID | GCGT_ME_MEA_CTYPE_HIST | 1 | 22 | 1 (0)| 00:00:01 | | |
|* 57 | INDEX RANGE SCAN | IDX_MEA_CTYPE_HIST_01 | 2 | | 1 (0)| 00:00:01 | | |
| 58 | TABLE ACCESS BY GLOBAL INDEX ROWID | GCCOM_SECTOR_SUPPLY | 1 | 51 | 1 (0)| 00:00:01 | ROWID | ROWID |
|* 59 | INDEX RANGE SCAN | IDX_GCCOM_SECTOR_SUPPLY_21 | 1 | | 1 (0)| 00:00:01 | | |
| 60 | TABLE ACCESS BY GLOBAL INDEX ROWID | GCCOM_CONTRACTED_SERVICE | 1 | 35 | 1 (0)| 00:00:01 | ROWID | ROWID |
|* 61 | INDEX RANGE SCAN | IDX_GCCOMCONTRACTEDSERVICE_28 | 1 | | 1 (0)| 00:00:01 | | |
| 62 | TABLE ACCESS BY GLOBAL INDEX ROWID | GCCOM_CONTRACT | 1 | 13 | 1 (0)| 00:00:01 | ROWID | ROWID |
|* 63 | INDEX UNIQUE SCAN | PK_GCCOM_CONTRACT | 1 | | 1 (0)| 00:00:01 | | |
| 64 | TABLE ACCESS BY INDEX ROWID | GCGT_ME_MEASURER | 1 | 16 | 1 (0)| 00:00:01 | | |
|* 65 | INDEX UNIQUE SCAN | PK_GCGT_ME_MEASURER | 1 | | 1 (0)| 00:00:01 | | |
|* 66 | TABLE ACCESS BY INDEX ROWID | GCGT_ME_DEVICE | 1 | 41 | 1 (0)| 00:00:01 | | |
|* 67 | INDEX UNIQUE SCAN | PK_GCGT_ME_DEVICE | 1 | | 1 (0)| 00:00:01 | | |
|* 68 | TABLE ACCESS BY INDEX ROWID | GCGT_ME_MEA_POINT_DEVICE_HIST | 1 | 14 | 1 (0)| 00:00:01 | | |
|* 69 | INDEX RANGE SCAN | IDX_GCGT_ME_MEAPOINTDEVHIST_04 | 1 | | 1 (0)| 00:00:01 | | |
| 70 | PARTITION HASH ITERATOR | | 1 | 33 | 1 (0)| 00:00:01 | KEY | KEY |
| 71 | TABLE ACCESS BY LOCAL INDEX ROWID | GCCC_CUSTOMER | 1 | 33 | 1 (0)| 00:00:01 | KEY | KEY |
|* 72 | INDEX UNIQUE SCAN | PK_GCCC_CUSTOMER | 1 | | 1 (0)| 00:00:01 | KEY | KEY |
|* 73 | INDEX FULL SCAN | PK_GCCOM_COMPANY | 1 | 5 | 1 (0)| 00:00:01 | | |
|* 74 | INDEX UNIQUE SCAN | PK_GCCOM_COMPANY | 1 | 5 | 1 (0)| 00:00:01 | | |
| 75 | SORT AGGREGATE | | 1 | 39 | | | | |
|* 76 | TABLE ACCESS BY GLOBAL INDEX ROWID | GCGT_RE_READING_E | 1 | 39 | 2 (0)| 00:00:01 | ROWID | ROWID |
|* 77 | INDEX RANGE SCAN | IDX$$_00000003 | 1 | | 1 (0)| 00:00:01 | | |
----------------------------------------------------------------------------------------------------------------------------------------------------- 140 filas seleccionadas.
请注意使用GATHER_PLAN_STATISTICS的解释计划，但似乎没有太大区别。
PLAN_TABLE_OUTPUT
------------------------------------------------------------------------------------------------------------------------------------------------------
Plan hash value: 3130792258
-----------------------------------------------------------------------------------------------------------------------------------------------------
| Id | Operation | Name | Rows | Bytes | Cost (%CPU)| Time | Pstart| Pstop |
-----------------------------------------------------------------------------------------------------------------------------------------------------
| 0 | SELECT STATEMENT | | 1 | 669 | 3888 (2)| 00:00:47 | | |
| 1 | TABLE ACCESS BY INDEX ROWID | GCCOM_COMPANY | 1 | 9 | 1 (0)| 00:00:01 | | |
|* 2 | INDEX UNIQUE SCAN | PK_GCCOM_COMPANY | 1 | | 1 (0)| 00:00:01 | | |
| 3 | TABLE ACCESS BY INDEX ROWID | GCCOM_COMPANY | 1 | 9 | 1 (0)| 00:00:01 | | |
|* 4 | INDEX UNIQUE SCAN | PK_GCCOM_COMPANY | 1 | | 1 (0)| 00:00:01 | | |
| 5 | SORT ORDER BY | | 1 | 669 | 3888 (2)| 00:00:47 | | |
| 6 | HASH UNIQUE | | 1 | 669 | 3887 (2)| 00:00:47 | | |
|* 7 | FILTER | | | | | | | |
| 8 | NESTED LOOPS | | 1 | 669 | 3884 (2)| 00:00:47 | | |
|* 18 | HASH JOIN | | 4 | 1596 | 3874 (2)| 00:00:47 | | |
|* 19 | HASH JOIN | | 17 | 6528 | 3872 (2)| 00:00:47 | | |
|* 20 | HASH JOIN | | 29 | 10121 | 3865 (2)| 00:00:47 | | |
| 21 | TABLE ACCESS BY INDEX ROWID | GCCOM_SECTOR | 1 | 18 | 1 (0)| 00:00:01 | | |
|* 22 | INDEX RANGE SCAN | IDX$$_00000002 | 1 | | 1 (0)| 00:00:01 | | |
|* 23 | HASH JOIN | | 29 | 9599 | 3864 (2)| 00:00:47 | | |
|* 24 | TABLE ACCESS BY INDEX ROWID | GCGT_ME_RATE_METER | 4 | 128 | 1 (0)| 00:00:01 | | |
|* 25 | INDEX RANGE SCAN | IDX_FK_ME_RATE_TY_RE_SPEC_01 | 23 | | 1 (0)| 00:00:01 | | |
| 26 | NESTED LOOPS | | | | | | | |
| 27 | NESTED LOOPS | | 381 | 111K| 3862 (2)| 00:00:47 | | |
| 28 | NESTED LOOPS | | 170 | 45220 | 3658 (2)| 00:00:44 | | |
| 29 | NESTED LOOPS | | 170 | 43010 | 3607 (2)| 00:00:44 | | |
|* 30 | HASH JOIN | | 1047 | 229K| 2613 (1)| 00:00:32 | | |
| 31 | NESTED LOOPS | | | | | | | |
| 32 | NESTED LOOPS | | 706 | 131K| 2255 (1)| 00:00:28 | | |
|* 33 | HASH JOIN | | 706 | 91074 | 2043 (1)| 00:00:25 | | |
|* 34 | TABLE ACCESS FULL | GCGT_WO_AREA_HIERARCHY | 348 | 8004 | 4 (0)| 00:00:01 | | |
|* 35 | HASH JOIN | | 119K| 12M| 2038 (1)| 00:00:25 | | |
|* 36 | TABLE ACCESS FULL | GCGT_WO_EXECUTION_AREA | 349 | 5933 | 5 (0)| 00:00:01 | | |
|* 37 | HASH JOIN | | 119K| 10M| 2032 (1)| 00:00:25 | | |
|* 38 | TABLE ACCESS FULL | GCGT_RE_READING_COOR_CENTER | 116 | 3364 | 4 (0)| 00:00:01 | | |
|* 39 | HASH JOIN | | 190K| 10M| 2026 (1)| 00:00:25 | | |
|* 40 | TABLE ACCESS FULL | GCGT_RE_READING_UNIT | 190 | 6840 | 5 (0)| 00:00:01 | | |
| 41 | TABLE ACCESS FULL | GCGT_RE_ITINERARY | 285K| 6689K| 2020 (1)| 00:00:25 | | |
|* 42 | INDEX UNIQUE SCAN | PK_GCGT_RE_ITINERARY_MACRO | 1 | | 1 (0)| 00:00:01 | | |
| 43 | TABLE ACCESS BY INDEX ROWID| GCGT_RE_ITINERARY_MACRO | 1 | 62 | 1 (0)| 00:00:01 | | |
|* 44 | TABLE ACCESS FULL | GCGT_RE_ROUTE | 5121 | 165K| 358 (1)| 00:00:05 | | |
|* 45 | TABLE ACCESS BY INDEX ROWID | GCGT_RE_MEA_POINT_ROUTE_HIST | 1 | 29 | 1 (0)| 00:00:01 | | |
|* 46 | INDEX RANGE SCAN | FK_RE_MEA_POINTHIST_ROUTE_01 | 4 | | 1 (0)| 00:00:01 | | |
| 47 | TABLE ACCESS BY INDEX ROWID | GCGT_RE_MEASUREMENT_POINT | 1 | 13 | 1 (0)| 00:00:01 | | |
|* 48 | INDEX UNIQUE SCAN | PK_GCGT_RE_MEASUREMENT_POINT | 1 | | 1 (0)| 00:00:01 | | |
|* 49 | INDEX RANGE SCAN | IDX_GCGT_RE_MPOINHHIST_04 | 2 | | 1 (0)| 00:00:01 | | |
| 50 | TABLE ACCESS BY INDEX ROWID | GCGT_RE_MPOINT_HIST | 2 | 66 | 1 (0)| 00:00:01 | | |
| 51 | TABLE ACCESS FULL | GCCOM_FARE | 374 | 13090 | 6 (0)| 00:00:01 | | |
| 52 | TABLE ACCESS BY INDEX ROWID | GCGT_ME_COMBINATION_USAGE_TYPE | 89 | 1335 | 1 (0)| 00:00:01 | | |
|* 53 | INDEX RANGE SCAN | IDX_FK_ME_COM_US_TY_DEV_TY_01 | 89 | | 1 (0)| 00:00:01 | | |
|* 54 | TABLE ACCESS BY GLOBAL INDEX ROWID | GCGT_RE_READING_E | 1 | 40 | 1 (0)| 00:00:01 | ROWID | ROWID |
|* 55 | INDEX RANGE SCAN | IDX$$_00000003 | 1 | | 1 (0)| 00:00:01 | | |
|* 56 | TABLE ACCESS BY INDEX ROWID | GCGT_ME_MEA_CTYPE_HIST | 1 | 22 | 1 (0)| 00:00:01 | | |
|* 57 | INDEX RANGE SCAN | IDX_MEA_CTYPE_HIST_01 | 2 | | 1 (0)| 00:00:01 | | |
| 58 | TABLE ACCESS BY GLOBAL INDEX ROWID | GCCOM_SECTOR_SUPPLY | 1 | 51 | 1 (0)| 00:00:01 | ROWID | ROWID |
|* 59 | INDEX RANGE SCAN | IDX_GCCOM_SECTOR_SUPPLY_21 | 1 | | 1 (0)| 00:00:01 | | |
| 60 | TABLE ACCESS BY GLOBAL INDEX ROWID | GCCOM_CONTRACTED_SERVICE | 1 | 35 | 1 (0)| 00:00:01 | ROWID | ROWID |
|* 61 | INDEX RANGE SCAN | IDX_GCCOMCONTRACTEDSERVICE_28 | 1 | | 1 (0)| 00:00:01 | | |
| 62 | TABLE ACCESS BY GLOBAL INDEX ROWID | GCCOM_CONTRACT | 1 | 13 | 1 (0)| 00:00:01 | ROWID | ROWID |
|* 63 | INDEX UNIQUE SCAN | PK_GCCOM_CONTRACT | 1 | | 1 (0)| 00:00:01 | | |
| 64 | TABLE ACCESS BY INDEX ROWID | GCGT_ME_MEASURER | 1 | 16 | 1 (0)| 00:00:01 | | |
|* 65 | INDEX UNIQUE SCAN | PK_GCGT_ME_MEASURER | 1 | | 1 (0)| 00:00:01 | | |
|* 66 | TABLE ACCESS BY INDEX ROWID | GCGT_ME_DEVICE | 1 | 41 | 1 (0)| 00:00:01 | | |
|* 67 | INDEX UNIQUE SCAN | PK_GCGT_ME_DEVICE | 1 | | 1 (0)| 00:00:01 | | |
|* 68 | TABLE ACCESS BY INDEX ROWID | GCGT_ME_MEA_POINT_DEVICE_HIST | 1 | 14 | 1 (0)| 00:00:01 | | |
|* 69 | INDEX RANGE SCAN | IDX_GCGT_ME_MEAPOINTDEVHIST_04 | 1 | | 1 (0)| 00:00:01 | | |
| 70 | PARTITION HASH ITERATOR | | 1 | 33 | 1 (0)| 00:00:01 | KEY | KEY |
| 71 | TABLE ACCESS BY LOCAL INDEX ROWID | GCCC_CUSTOMER | 1 | 33 | 1 (0)| 00:00:01 | KEY | KEY |
|* 72 | INDEX UNIQUE SCAN | PK_GCCC_CUSTOMER | 1 | | 1 (0)| 00:00:01 | KEY | KEY |
|* 73 | INDEX FULL SCAN | PK_GCCOM_COMPANY | 1 | 5 | 1 (0)| 00:00:01 | | |
|* 74 | INDEX UNIQUE SCAN | PK_GCCOM_COMPANY | 1 | 5 | 1 (0)| 00:00:01 | | |
| 75 | SORT AGGREGATE | | 1 | 39 | | | | |
|* 76 | TABLE ACCESS BY GLOBAL INDEX ROWID | GCGT_RE_READING_E | 1 | 39 | 2 (0)| 00:00:01 | ROWID | ROWID |
|* 77 | INDEX RANGE SCAN | IDX$$_00000003 | 1 | | 1 (0)| 00:00:01 | | |
-----------------------------------------------------------------------------------------------------------------------------------------------------
我改变了这样的子查询：
SELECT DISTINCT
COM_S.COD_USER_COMPANY AS SOCIEDAD,
COM_D.COD_USER_COMPANY AS DISTRIBUIDORA
FROM
GCCOM_SECTOR_SUPPLY SS
LEFT OUTER JOIN GCCOM_COMPANY COM_S ON COM_S.ID_COMPANY = SS.ID_SELLER
LEFT OUTER JOIN GCCOM_COMPANY COM_D ON COM_D.ID_COMPANY = SS.ID_DISTRIBUTER
INNER JOIN GCCOM_COMPANY COM ON COM.ID_COMPANY = SS.ID_SELLER OR COM.ID_COMPANY = SS.ID_DISTRIBUTER
WHERE
3000000 = COM_S.ID_COMPANY
ORDER BY by SOCIEDAD, DISTRIBUIDORA;
是不是？返回的行与befora相同。请告诉。