SQL命令未在我尝试使用UNION函数的位置正确结束

这是我写的代码，我一直得到错误

我想做的是，Client有两个子类“CASUAL_JOB和CONTRACT_JOB”，但这两个类在不同的标题下有Client No（Client表的主键）。所以我的目标是找到总成本（发票表中的信息），它与JobID（发票、合同作业、合同作业表中的信息）集成，并从客户表中检索客户信息

（+）用于左外接头

SELECT 
    C.ClientNo, 
    C.ClientName, 
    NVL(TotalExpenses,0)
FROM
     CLIENT C,
     (SELECT 
          C.ClientNo, 
          C.ClientName, 
          NVL(SUM(I.Amount),0) AS TotalExpenses
      FROM 
          CLIENT C, 
          CASUAL_JOB CA, 
          INVOICE I
      WHERE 
          C.ClientNo = CA.IndividualClientNo 
        AND 
          I.JobID = CA.JobID
     ) R1
     UNION
     (SELECT 
          C.ClientNo, 
          C.ClientName, 
          NVL(SUM(I.Amount),0) AS TotalExpenses
      FROM 
          CLIENT C, 
          CONTRACT_JOB CO, 
          INVOICE I
      WHERE 
          I.JobID = CO.JobID 
        AND 
          CO.CorporateClientNo = C.ClientNo
     ) R2
WHERE 
    R2.CLientNo = R1.ClientNo (+);

示例数据如下所示

----DUMMY DATA INSERTION COMMANDS-----------------
-- CLIENT (ClientNo, ClientName, ClientAddress, ClientPhone, ClientEmail)
INSERT INTO CLIENT VALUES('1','Rachel Green', '63 Rosebery Avenue, Preston', '0540677455', 'rachel.green@gmail.com');
INSERT INTO CLIENT VALUES('2','Kazi Gellar', '57 Rosebery Rd, Preston', '0450677456', 'kazi.gellar@gmail.com');
INSERT INTO CLIENT VALUES('3','Syed Ahmed', '123 Waratah St, Thomastown', '0450672446', 'syed.ahmed@gmail.com');
INSERT INTO CLIENT VALUES('4','Esrar Mahbub', '3 Kingsburry Dr, Bundoora', '044576823', 'esrar.mahbub@gmail.com');
INSERT INTO CLIENT VALUES('5','Samira Sadmin', '1053 Kingsburry Dr, Bundoora', '0411077455', 'samira.sadmin@gmail.com');
INSERT INTO CLIENT VALUES('6','Adam Lever', '11 Cheddar Rd, Reservoir', '0440677455', 'adam.lever@gmail.com');
INSERT INTO CLIENT VALUES('7','Kazi Nipu', '12 Belah St, Thomastown', '0123477455', 'kazi.nipu@gmail.com');
INSERT INTO CLIENT VALUES('8','Arefin Islam', '32 Grace St, Laverton', '0390677455', 'arefin.islam@gmail.com');
INSERT INTO CLIENT VALUES('9','Roger Federer', '11 Alps Rd, Melbourne', '0455577455', 'roger.federer@gmail.com');
INSERT INTO CLIENT VALUES('10','Andy Marray', '13 Kings Rd, Melbourne', '0555577456', 'andy.marray@gmail.com');
INSERT INTO CLIENT VALUES('11','Joe Santrini', '56 Dunne St, Bundoora', '0540677467', 'joe.santrini@gmail.com');
INSERT INTO CLIENT VALUES('12','David Packman', '11 St Kilda Rd, Melbourne', '0540677411', 'david.packman@gmail.com');
INSERT INTO CLIENT VALUES('13','Cristopher Nolan', '15 Lonsdale St, Melbourne', '0540677477', 'c.nolan@gmail.com');
INSERT INTO CLIENT VALUES('14','Bruse Wayne', '10 Batcave Aveneu, Epping', '0111111455', 'bruce.wayne@gmail.com');
INSERT INTO CLIENT VALUES('15','Chandler Bing', '2/80 Friends Rd, Altona', '0540677222', 'chandler.bing@gmail.com');
INSERT INTO CLIENT VALUES('16','Ross Geller', '33 Waratah St, Altona', '0540444455', 'ross.geller@gmail.com');
INSERT INTO CLIENT VALUES('17','Joe Tribiany', '3/80 Friends Rd, Altona', '0540677221', 'joe.tribiany@gmail.com');
INSERT INTO CLIENT VALUES('18','Jack Roland', '41 Alexander Avenue, Thomastown', '0540677999', 'jack.roland@gmail.com');
INSERT INTO CLIENT VALUES('19','Henry Steven', '2 Queens St, Melbourne', '0450872449', 'henry.steven@gmail.com');
INSERT INTO CLIENT VALUES('20','Ragibul Hasan', '13 Swanston St, Melbourne', '0540687878', 'ragibul.hasan@gmail.com');

--CORPORATE_CLIENT (ClientNo, CorporationName, BusinessAddress)
INSERT INTO CORPORATE_CLIENT VALUES('1', 'Apple Inc', '10 Southbank, Melbourne');
INSERT INTO CORPORATE_CLIENT VALUES('2', 'Microsoft', '15 Southbank, Melbourne');
INSERT INTO CORPORATE_CLIENT VALUES('3', 'Dell', '23 High St, Preston');
INSERT INTO CORPORATE_CLIENT VALUES('4', 'IBM', '628 Victoria St, Epping');
INSERT INTO CORPORATE_CLIENT VALUES('5', 'Grocon', '180 Swanston St, Melbourne');
INSERT INTO CORPORATE_CLIENT VALUES('6', 'La Trobe University', 'Plenty Road and Kingsburry Drive, Bundoora');
INSERT INTO CORPORATE_CLIENT VALUES('7', 'Public Transport Victoria', '750 Collins St, Melbourne');
INSERT INTO CORPORATE_CLIENT VALUES('8', 'RACV', '105 Grimshaw St, Greensborough');
INSERT INTO CORPORATE_CLIENT VALUES('9', 'Woolworths', '1 Bell St, Preston');
INSERT INTO CORPORATE_CLIENT VALUES('10', 'Coles', '71 May Rd, Lalor');

--INDIVIDUAL_CLIENT (ClientNo, PropertyOwner)
INSERT INTO INDIVIDUAL_CLIENT VALUES('11', 'Y');
INSERT INTO INDIVIDUAL_CLIENT VALUES('12', 'Y');
INSERT INTO INDIVIDUAL_CLIENT VALUES('13', 'N');
INSERT INTO INDIVIDUAL_CLIENT VALUES('14', 'N');
INSERT INTO INDIVIDUAL_CLIENT VALUES('15', 'Y');
INSERT INTO INDIVIDUAL_CLIENT VALUES('16', 'N');
INSERT INTO INDIVIDUAL_CLIENT VALUES('17', 'Y');
INSERT INTO INDIVIDUAL_CLIENT VALUES('18', 'N');
INSERT INTO INDIVIDUAL_CLIENT VALUES('19', 'N');
INSERT INTO INDIVIDUAL_CLIENT VALUES('20', 'N');

--BUSINESS (ABNNumber, BusinessName, ContactName, ContactNumber, ContactEmail, BusinessAddress, BusinessPostcode)
INSERT INTO BUSINESS VALUES('12345678911', 'James Mowers and Landscape', 'James Handerson', '038122354', 'james@yahoo.com', '2 Davidson st, Epping', 3076);
INSERT INTO BUSINESS VALUES('12345678912', 'Consolidated Proerty Services', 'Monica Rashid', '039342354', 'hrashid@cps.com', 'Cr Lonsdale St and Russel St, Melbourne', 3000);
INSERT INTO BUSINESS VALUES('12345678913', 'Kohlan Movers', 'Vicky Kohlan', '039342355', 'moversk@gmail.com', '4/3 Grace St, Laverton', 3028);
INSERT INTO BUSINESS VALUES('12345678914', 'Pumbers Delivered', 'Harry Tradil', '039342344', 'harryt@hotmail.com', '3 Station St, Reservoir', 3073);
INSERT INTO BUSINESS VALUES('12345678915', 'Anytime Plumbers', 'Joseph Green', '039342322', 'jgreen@hotmail.com', '11 Station St, Reservoir', 3073);
INSERT INTO BUSINESS VALUES('12345678916', 'Change the Fuse Electricals', 'Brian Adams', '039342311', 'adamsb@yahoo.com.au', '12 Laimar St, Sunbury', 3429);
INSERT INTO BUSINESS VALUES('12345678917', 'Vicky Electricals', 'Vicky Hasan', '039342300', 'vickyh@gmail.com', '12 Wood St, North Melbourne', 3051);
INSERT INTO BUSINESS VALUES('12345678918', 'Leak and Roof Repair', 'David Bongiorno', '039342400', 'davidb@yahoo.com', '101 Swanston St, Melbourne', 3000);
INSERT INTO BUSINESS VALUES('12345678919', 'Construction Solutions', 'Garry Hobart', '039342399', 'garryh@hotmail.com', '21 Albundy Gr, St Kilda', 3182);
INSERT INTO BUSINESS VALUES('12345678920', 'Build a House', 'Jason Staham', '039342388', 'jasons@hotmail.com', '1055 Plenty Rd, Bundoora', 3083);
INSERT INTO BUSINESS VALUES('12345678921', 'Hire a Wire', 'David Sully', '039341188', 'davids@yourmail.com', '67 Cramer St, Preston', 3072);
INSERT INTO BUSINESS VALUES('12345678922', 'Joe''s Rubbish Removal', 'Joseph Mahmud', '039342001', 'joseph@openmail.com', '108 Bell St, Preston', 3072);
INSERT INTO BUSINESS VALUES('12345678923', 'Do it Right Mowers', 'Abdullah Mamun', '038122333', 'mamun@yahoo.com', '31 Stephen St, Epping', 3076);
INSERT INTO BUSINESS VALUES('12345678924', 'Shine Cleaning', 'Cyn Jones', '038128989', 'jonesc@gmail.com', '17 Husband St, Eltham', 3095);
INSERT INTO BUSINESS VALUES('12345678925', 'Moveit', 'Sunny Joe', '038000033', 'sunny@hotmail.com', '90 Russel St, Melbourne', 3000);
INSERT INTO BUSINESS VALUES('12345678926', 'Home Cleaning Services', 'Omid Rostami', '038002333', 'omid@hotmail.com', '40 Statino St, North Melbourne', 3051);
INSERT INTO BUSINESS VALUES('12345678927', '24X7 Plumbing Service', 'Hayden Jones', '045002333', 'hjones@yahoo.com', '12 Rathdown Rd, Melbourne', 3000);
INSERT INTO BUSINESS VALUES('12345678928', 'Muscle Rubbish Removals', 'Alex Sanders', '045067633', 'alex@mrr.com.au', '57 Leeds St, Thomastown', 3074);

--CORPORATE_BUSINESS (ABNNumber)
INSERT INTO CORPORATE_BUSINESS VALUES('12345678911');
INSERT INTO CORPORATE_BUSINESS VALUES('12345678912');
INSERT INTO CORPORATE_BUSINESS VALUES('12345678914');
INSERT INTO CORPORATE_BUSINESS VALUES('12345678915');
INSERT INTO CORPORATE_BUSINESS VALUES('12345678916');
INSERT INTO CORPORATE_BUSINESS VALUES('12345678918');
INSERT INTO CORPORATE_BUSINESS VALUES('12345678919');
INSERT INTO CORPORATE_BUSINESS VALUES('12345678920');
INSERT INTO CORPORATE_BUSINESS VALUES('12345678921');
INSERT INTO CORPORATE_BUSINESS VALUES('12345678928');

--ELITE_MEMBER (EliteMemberID)
INSERT INTO ELITE_MEMBER VALUES('1');
INSERT INTO ELITE_MEMBER VALUES('2');
INSERT INTO ELITE_MEMBER VALUES('3');
INSERT INTO ELITE_MEMBER VALUES('4');
INSERT INTO ELITE_MEMBER VALUES('5');
INSERT INTO ELITE_MEMBER VALUES('6');
INSERT INTO ELITE_MEMBER VALUES('7');
INSERT INTO ELITE_MEMBER VALUES('8');
INSERT INTO ELITE_MEMBER VALUES('9');
INSERT INTO ELITE_MEMBER VALUES('10');
INSERT INTO ELITE_MEMBER VALUES('11');
INSERT INTO ELITE_MEMBER VALUES('12');
INSERT INTO ELITE_MEMBER VALUES('13');

--FREELANCER_BUSINESS (ABNNumber, EliteMemberID)
INSERT INTO FREELANCER_BUSINESS VALUES('12345678913', '1');
INSERT INTO FREELANCER_BUSINESS VALUES('12345678917', '2');
INSERT INTO FREELANCER_BUSINESS VALUES('12345678922', '3');
INSERT INTO FREELANCER_BUSINESS VALUES('12345678923', '4');
INSERT INTO FREELANCER_BUSINESS VALUES('12345678924', '5');
INSERT INTO FREELANCER_BUSINESS VALUES('12345678925', null);
INSERT INTO FREELANCER_BUSINESS VALUES('12345678926', '13');
INSERT INTO FREELANCER_BUSINESS VALUES('12345678927', '6');

--SUBURB (Postcode, SuburbName)
INSERT INTO SUBURB VALUES(3083, 'Bundoora');
INSERT INTO SUBURB VALUES(3000, 'Melbourne');
INSERT INTO SUBURB VALUES(3076, 'Epping');
INSERT INTO SUBURB VALUES(3028, 'Laverton');
INSERT INTO SUBURB VALUES(3073, 'Reservoir');
INSERT INTO SUBURB VALUES(3074, 'Thomastown');
INSERT INTO SUBURB VALUES(3429, 'Sunbury');
INSERT INTO SUBURB VALUES(3182, 'St Kilda');
INSERT INTO SUBURB VALUES(3051, 'North Melbourne');
INSERT INTO SUBURB VALUES(3072, 'Preston');
INSERT INTO SUBURB VALUES(3095, 'Eltham');
INSERT INTO SUBURB VALUES(3018, 'Altona');
INSERT INTO SUBURB VALUES(3088, 'Greensborough');
INSERT INTO SUBURB VALUES(3075, 'Lalor');

--ADJACENT_SUBURB (PostCode, AdjacentPostCode)
INSERT INTO ADJACENT_SUBURB VALUES(3083, 3072);
INSERT INTO ADJACENT_SUBURB VALUES(3072, 3083);
INSERT INTO ADJACENT_SUBURB VALUES(3072, 3074);
INSERT INTO ADJACENT_SUBURB VALUES(3074, 3072);
INSERT INTO ADJACENT_SUBURB VALUES(3072, 3073);
INSERT INTO ADJACENT_SUBURB VALUES(3073, 3072);
INSERT INTO ADJACENT_SUBURB VALUES(3083, 3074);
INSERT INTO ADJACENT_SUBURB VALUES(3074, 3083);
INSERT INTO ADJACENT_SUBURB VALUES(3073, 3083);
INSERT INTO ADJACENT_SUBURB VALUES(3083, 3073);
INSERT INTO ADJACENT_SUBURB VALUES(3028, 3018);
INSERT INTO ADJACENT_SUBURB VALUES(3018, 3028);
INSERT INTO ADJACENT_SUBURB VALUES(3075, 3074);
INSERT INTO ADJACENT_SUBURB VALUES(3074, 3075);
INSERT INTO ADJACENT_SUBURB VALUES(3072, 3075);
INSERT INTO ADJACENT_SUBURB VALUES(3075, 3072);
INSERT INTO ADJACENT_SUBURB VALUES(3083, 3088);
INSERT INTO ADJACENT_SUBURB VALUES(3088, 3083);
INSERT INTO ADJACENT_SUBURB VALUES(3095, 3088);
INSERT INTO ADJACENT_SUBURB VALUES(3088, 3095);
INSERT INTO ADJACENT_SUBURB VALUES(3182, 3000);
INSERT INTO ADJACENT_SUBURB VALUES(3000, 3182);
INSERT INTO ADJACENT_SUBURB VALUES(3000, 3051);
INSERT INTO ADJACENT_SUBURB VALUES(3051, 3000);
INSERT INTO ADJACENT_SUBURB VALUES(3083, 3076);
INSERT INTO ADJACENT_SUBURB VALUES(3076, 3083);
INSERT INTO ADJACENT_SUBURB VALUES(3072, 3076);
INSERT INTO ADJACENT_SUBURB VALUES(3076, 3072);
INSERT INTO ADJACENT_SUBURB VALUES(3076, 3075);
INSERT INTO ADJACENT_SUBURB VALUES(3075, 3076);




   --TRADE_UNION (UnionID, UnionTitle, UnionContactName, UnionContactNumber, UnionEmail, UnionAddress, EliteMemberID)
    INSERT INTO TRADE_UNION VALUES('1', 'Mowers'' Union', 'John Doe', '0460782331','mowers.union@gmail.com', '15 Flinders St, Melbourne', '7');
    INSERT INTO TRADE_UNION VALUES('2', 'Cleaners'' Union', 'Jane Joe', '0460782332','cleaners.union@gmail.com', '11 Bourke St, Melbourne', '8');
    INSERT INTO TRADE_UNION VALUES('3', 'Movers'' Union', 'Jack Hammer', '0460782333','movers.union@gmail.com', '9 La Trobe St, Melbourne','9');
    INSERT INTO TRADE_UNION VALUES('4', 'Electricians'' Union', 'John Board', '0460782334','electricians.union@gmail.com', '19 Collins St, Melbourne', '10');
    INSERT INTO TRADE_UNION VALUES('5', 'Plumbers'' Union', 'Loren Daniels', '0460782335','plumbers.union@gmail.com', '2/34 Little Lonsdale St, Melbourne', '11');
    INSERT INTO TRADE_UNION VALUES('6', 'Construction Workers'' Union', 'Harvey Dent', '0460782336','constructionworkers.union@gmail.com', 'Lonsdale St and Russel St, Melbourne', '12');

--INDUSTRY (IndustryID, IndustryTitle, UnionID)
INSERT INTO INDUSTRY VALUES('1', 'Cleaning', '2');
INSERT INTO INDUSTRY VALUES('2', 'Heavy Goods Transport', '3');
INSERT INTO INDUSTRY VALUES('3', 'Landscape', '1');
INSERT INTO INDUSTRY VALUES('4', 'Lawn and Backyard Mowing', '1');
INSERT INTO INDUSTRY VALUES('5', 'Plumbing', '5');
INSERT INTO INDUSTRY VALUES('6', 'Electrical Works', '4');
INSERT INTO INDUSTRY VALUES('7', 'Roof Restoration', '6');
INSERT INTO INDUSTRY VALUES('8', 'General Construction', '6');
INSERT INTO INDUSTRY VALUES('9', 'Demolition and Rubbish Removal', '6');


--JOB (JobID, JobDescription, UrgencyLevel, JobAddress, Postcode, IndustryID, SelectedBusinessABNNumber)
INSERT INTO JOB VALUES('1', 'I need my lawn mowed', 'Immediate', '56 Dunne St, Bundoora', 3083, '4', NULL);
INSERT INTO JOB VALUES('2', 'Backyard mowing job', 'Normal', '11 St Kilda Rd, Melbourne', 3000, '4', NULL);
INSERT INTO JOB VALUES('3', 'Need help to move to a new house', 'Immediate', '15 Lonsdale St, Melbourne', 3000, '2', NULL);
INSERT INTO JOB VALUES('4', 'Movers needed to change house', 'Immediate', '10 Batcave Aveneu, Epping', 3076, '2', NULL);
INSERT INTO JOB VALUES('5', 'Leake in the roof needs fixing', 'Immediate', '2/80 Friends Rd, Altona', 3018, '7', NULL);
INSERT INTO JOB VALUES('6', 'Roof needs a paint', 'Low', '33 Waratah St, Altona', 3018, '7', NULL);
INSERT INTO JOB VALUES('7', 'Need my house cleaned after a party', 'Normal', '3/80 Friends Rd, Altona', 3018, '1', NULL);
INSERT INTO JOB VALUES('8', 'Need a new landscape design', 'Normal', '41 Alexander Avenue, Thomastown', 3074, '3', NULL);
INSERT INTO JOB VALUES('9', 'Backyard garbage needs to be removed', 'Immediate', '2 Queens St, Melbourne', 3000, '9', NULL);
INSERT INTO JOB VALUES('10', 'Leak in the basin bottom', 'Immediate', '13 Swanston St, Melbourne', 3000, '5', NULL);
INSERT INTO JOB VALUES('11', 'Need a contractual cleaner', 'Low', '10 Southbank, Melbourne', 3000, '1', NULL);
INSERT INTO JOB VALUES('12', 'Contractual electrical wiring job', 'Immediate', '15 Southbank, Melbourne', 3000, '6', NULL);
INSERT INTO JOB VALUES('13', 'Electrician needed for 3 months period', 'Normal', '23 High St, Preston', 3072, '6', NULL);
INSERT INTO JOB VALUES('14', 'New office space extension', 'Low', '628 Victoria St, Epping', 3076, '8', NULL);
INSERT INTO JOB VALUES('15', 'Plumbing line inspection and maintenance', 'Immediate', '180 Swanston St, Melbourne', 3000, '5', NULL);
INSERT INTO JOB VALUES('16', 'New courtyard construction: Thomas Cherry Building', 'Normal', 'Plenty Road and Kingsburry Drive', 3083, '8', NULL);
INSERT INTO JOB VALUES('17', 'Structural crack repair', 'Immediate', '750 Collins St, Melbourne', 3000, '8', NULL);
INSERT INTO JOB VALUES('18', 'Carpark construction', 'Low', '105 Grimshaw St, Greensborough', 3088, '8', NULL);
INSERT INTO JOB VALUES('19', 'Commercial cleaners needed', 'Immediate', '1 Bell St, Preston', 3072, '1', NULL);
INSERT INTO JOB VALUES('20', 'Nightly stock-rubbish removal', 'Immediate', '71 May Rd, Lalor', 3075, '9', NULL);




--CONTRACT_JOB (JobID, StartDate, EndDate, CorporateClientNo)
INSERT INTO CONTRACT_JOB VALUES('11', NULL, NULL, '1');
INSERT INTO CONTRACT_JOB VALUES('12', TO_DATE('03-MAR-2020', 'DD-MON-YYYY'), TO_DATE('02-MAR-2021', 'DD-MON-YYYY'), '2');
INSERT INTO CONTRACT_JOB VALUES('13', TO_DATE('27-FEB-2020', 'DD-MON-YYYY'), TO_DATE('26-AUG-2020', 'DD-MON-YYYY'), '3');
INSERT INTO CONTRACT_JOB VALUES('14', TO_DATE('15-MAR-2020', 'DD-MON-YYYY'), TO_DATE('14-MAR-2022', 'DD-MON-YYYY'), '4');
INSERT INTO CONTRACT_JOB VALUES('15', NULL, NULL, '5');
INSERT INTO CONTRACT_JOB VALUES('16', TO_DATE('25-FEB-2015', 'DD-MON-YYYY'), TO_DATE('24-FEB-2017', 'DD-MON-YYYY'), '6');
INSERT INTO CONTRACT_JOB VALUES('17', TO_DATE('01-JAN-2018', 'DD-MON-YYYY'), TO_DATE('31-DEC-2020', 'DD-MON-YYYY'), '7');
INSERT INTO CONTRACT_JOB VALUES('18', TO_DATE('06-JUN-2018', 'DD-MON-YYYY'), TO_DATE('05-DEC-2018', 'DD-MON-YYYY'), '8');
INSERT INTO CONTRACT_JOB VALUES('19', TO_DATE('02-MAR-2019', 'DD-MON-YYYY'), TO_DATE('01-MAY-2019', 'DD-MON-YYYY'), '9');
INSERT INTO CONTRACT_JOB VALUES('20', NULL, NULL, '10');

--CASUAL_JOB (JobID, IndividualClientNo)
INSERT INTO CASUAL_JOB VALUES('1', '11');
INSERT INTO CASUAL_JOB VALUES('2', '12');
INSERT INTO CASUAL_JOB VALUES('3', '13');
INSERT INTO CASUAL_JOB VALUES('4', '14');
INSERT INTO CASUAL_JOB VALUES('5', '15');
INSERT INTO CASUAL_JOB VALUES('6', '16');
INSERT INTO CASUAL_JOB VALUES('7', '17');
INSERT INTO CASUAL_JOB VALUES('8', '18');
INSERT INTO CASUAL_JOB VALUES('9', '19');
INSERT INTO CASUAL_JOB VALUES('10', '20');

--QUOTATION (JobID, ABNNumber, QuoteAmount)
INSERT INTO QUOTATION VALUES('1', '12345678923', 100.00);
INSERT INTO QUOTATION VALUES('2', '12345678923', 80.00);
INSERT INTO QUOTATION VALUES('3', '12345678913', 300.00);
INSERT INTO QUOTATION VALUES('3', '12345678925', 280.00);
INSERT INTO QUOTATION VALUES('4', '12345678913', 250.00);
INSERT INTO QUOTATION VALUES('7', '12345678926', 100.00);
INSERT INTO QUOTATION VALUES('8', '12345678923', 400.00);
INSERT INTO QUOTATION VALUES('9', '12345678922', 150.00);
INSERT INTO QUOTATION VALUES('10', '12345678927', 700.00);
INSERT INTO QUOTATION VALUES('11', '12345678912', 3000.00);
INSERT INTO QUOTATION VALUES('12', '12345678916', 10000.00);
INSERT INTO QUOTATION VALUES('12', '12345678921', 12000.00);
INSERT INTO QUOTATION VALUES('13', '12345678916', 15000.00);
INSERT INTO QUOTATION VALUES('14', '12345678919', 7000.00);
INSERT INTO QUOTATION VALUES('14', '12345678920', 7500.00);
INSERT INTO QUOTATION VALUES('15', '12345678914', 20000.00);
INSERT INTO QUOTATION VALUES('15', '12345678915', 22500.00);
INSERT INTO QUOTATION VALUES('16', '12345678919', 12000.00);
INSERT INTO QUOTATION VALUES('16', '12345678920', 13000.00);
INSERT INTO QUOTATION VALUES('17', '12345678919', 33000.00);
INSERT INTO QUOTATION VALUES('17', '12345678920', 31500.00);
INSERT INTO QUOTATION VALUES('18', '12345678919', 7800.00);
INSERT INTO QUOTATION VALUES('19', '12345678912', 2800.00);
INSERT INTO QUOTATION VALUES('20', '12345678928', 4500.00);


UPDATE JOB SET SelectedBusinessABNNumber = '12345678923' WHERE JobID = 1;
UPDATE JOB SET SelectedBusinessABNNumber = '12345678925' WHERE JobID = 3;
UPDATE JOB SET SelectedBusinessABNNumber = '12345678926' WHERE JobID = 7;
UPDATE JOB SET SelectedBusinessABNNumber = '12345678923' WHERE JobID = 8;
UPDATE JOB SET SelectedBusinessABNNumber = '12345678927' WHERE JobID = 10;
UPDATE JOB SET SelectedBusinessABNNumber = '12345678921' WHERE JobID = 12;
UPDATE JOB SET SelectedBusinessABNNumber = '12345678916' WHERE JobID = 13;
UPDATE JOB SET SelectedBusinessABNNumber = '12345678919' WHERE JobID = 14;
UPDATE JOB SET SelectedBusinessABNNumber = '12345678914' WHERE JobID = 15;
UPDATE JOB SET SelectedBusinessABNNumber = '12345678920' WHERE JobID = 16;
UPDATE JOB SET SelectedBusinessABNNumber = '12345678920' WHERE JobID = 17;
UPDATE JOB SET SelectedBusinessABNNumber = '12345678919' WHERE JobID = 18;
UPDATE JOB SET SelectedBusinessABNNumber = '12345678912' WHERE JobID = 19;

--BUSINESS_INDUSTRY (ABNNumber, IndustryID)
INSERT INTO BUSINESS_INDUSTRY VALUES('12345678911', '4');
INSERT INTO BUSINESS_INDUSTRY VALUES('12345678912', '1');
INSERT INTO BUSINESS_INDUSTRY VALUES('12345678913', '2');
INSERT INTO BUSINESS_INDUSTRY VALUES('12345678914', '5');
INSERT INTO BUSINESS_INDUSTRY VALUES('12345678915', '5');
INSERT INTO BUSINESS_INDUSTRY VALUES('12345678916', '6');
INSERT INTO BUSINESS_INDUSTRY VALUES('12345678917', '6');
INSERT INTO BUSINESS_INDUSTRY VALUES('12345678918', '7');
INSERT INTO BUSINESS_INDUSTRY VALUES('12345678919', '8');
INSERT INTO BUSINESS_INDUSTRY VALUES('12345678920', '8');
INSERT INTO BUSINESS_INDUSTRY VALUES('12345678921', '6');
INSERT INTO BUSINESS_INDUSTRY VALUES('12345678922', '9');
INSERT INTO BUSINESS_INDUSTRY VALUES('12345678923', '4');
INSERT INTO BUSINESS_INDUSTRY VALUES('12345678924', '1');
INSERT INTO BUSINESS_INDUSTRY VALUES('12345678925', '2');
INSERT INTO BUSINESS_INDUSTRY VALUES('12345678926', '1');
INSERT INTO BUSINESS_INDUSTRY VALUES('12345678927', '5');
INSERT INTO BUSINESS_INDUSTRY VALUES('12345678928', '9');

----INVOICE (InvoiceNo, Amount, JobID)
INSERT INTO INVOICE VALUES('1', 100, '1');
INSERT INTO INVOICE VALUES('2', 280, '3');
INSERT INTO INVOICE VALUES('3', 100, '7');
INSERT INTO INVOICE VALUES('4', 400, '8');
INSERT INTO INVOICE VALUES('5', 700, '10');
INSERT INTO INVOICE VALUES('6', 1000, '12');
INSERT INTO INVOICE VALUES('7', 2000, '12');
INSERT INTO INVOICE VALUES('8', 5000, '13');
INSERT INTO INVOICE VALUES('9', 1500, '14');
INSERT INTO INVOICE VALUES('10', 2000, '15');
INSERT INTO INVOICE VALUES('11', 3000, '15');
INSERT INTO INVOICE VALUES('12', 1000, '16');
INSERT INTO INVOICE VALUES('13', 3000, '16');
INSERT INTO INVOICE VALUES('14', 4800, '17');
INSERT INTO INVOICE VALUES('15', 800, '19');

--SEMINAR (SeminarID, SeminarTitle, SeminarDataTime, SeminarVenue)
INSERT INTO SEMINAR VALUES('1', 'Career Development for Construction Workers.', TO_DATE('12-AUG-2020 10:00', 'DD-MON-YYYY HH24:MI'), 'Convention Hall, Bundoora, 3083');
INSERT INTO SEMINAR VALUES('2', 'Ray White Career Seminar for Construction Workers', TO_DATE('28-SEP-2020 11:00', 'DD-MON-YYYY HH24:MI'), 'Convention Hall, Bundoora, 3083');
INSERT INTO SEMINAR VALUES('3', 'Career Fair for Plumbing Workers', TO_DATE('05-AUG-2020 14:00', 'DD-MON-YYYY HH24:MI'), 'Local Counsil Office, Epping, 3076');
INSERT INTO SEMINAR VALUES('4', 'Cleaners Counsil Seminar', TO_DATE('15-SEP-2020 13:00', 'DD-MON-YYYY HH24:MI'), 'CLT, Melbourne Polytechnic, Preston, 3072');

--SEMINAR_ATTENDIES (EliteMemberID, SeminarID)
INSERT INTO SEMINAR_ATTENDIES VALUES('12','1');
INSERT INTO SEMINAR_ATTENDIES VALUES('12','2');
INSERT INTO SEMINAR_ATTENDIES VALUES('11','3');
INSERT INTO SEMINAR_ATTENDIES VALUES('6','3');
INSERT INTO SEMINAR_ATTENDIES VALUES('5','4');
INSERT INTO SEMINAR_ATTENDIES VALUES('13','4');
INSERT INTO SEMINAR_ATTENDIES VALUES('8','4');

任何人都可以使用此数据库进行进一步练习。非常感谢。 这是表格的结构

客户机（客户号、客户名、客户地址、客户电话、， 客户（邮件） 公司客户（客户号、公司名称、业务地址） 个人客户（客户号、业主） 业务（ABNNumber、BusinessName、ContactName、ContactNumber、， 联系人（电子邮件、业务地址、业务邮政编码） 自由职业者（ABNUMBER，EliteMemberID） 公司业务（ABNU编号） 工作（工作ID、工作描述、紧急级别、工作地址、邮政编码、， 所选业务编号（行业ID） 合同工作（工号、开始日期、结束日期、公司客户号） 临时工（工号，个人客户号） 行业（IndustryID、IndustryTile、UnionID） 工会（工会ID、工会名称、工会联系人姓名、， UnionContactNumber、UnionEmail、UnionAddress、EliteMemberID） 郊区（邮政编码、郊区名称） 发票（发票编号、金额、工号） 研讨会（研讨会、研讨会、研讨会时间、研讨会地点） 报价单（作业ID、异常编号、QuoteAmount） 商业与工业（ABN编号，行业ID） 邻近郊区（邮政编码，相邻邮政编码） 精英成员（精英成员） 参加研讨会（EliteMemberID、Seminandand）

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希望对大家有所帮助。

我格式化了您的代码，使其可读。通过缩进，你可以看到问题所在。在“FROM”部分的第6/7行。Oracle无法真正理解您试图对该语句执行什么操作，当解析器在“（+）”处到达查询的末尾时，他会告诉您缺少/不方便的内容。这就是为什么他告诉你这是“（+）”的原因。但问题是更早。这是你构建“源”部分的方式。这有点让人困惑，所以这里只是一个提示：

使用“union”时，不会为两个查询中的每一个都提供别名。这两个查询的结果集都是“unioned”，因此您不能在“WHERE”部分引用其中任何一个

您应该重写查询，而不是将客户机与联合体合并，您应该合并两个单独的查询：一个将客户机与临时作业合并，一个将客户机与对照作业合并。以下示例未在SQL工具中进行测试：

SELECT
    c.clientNo,
    c.clientName,
    nvl(sum(i.amount),0) as totalExpenses
FROM
    client c,
    casual_job ca,
    invoice i
WHERE
    c.clientNo = ca.individualClientNo
  AND
    i.jobId = ca.jobId
GROUP BY
    c.clientNo,
    c.clientName
UNION
SELECT
    c.clientNo,
    c.clientName,
    nvl(sum(i.amount),0) as totalExpenses
FROM
    client c,
    contract_job co,
    invoice i
WHERE
    c.clientNo = co.corporateClientNo
  AND
    i.jobId = co.jobId
GROUP BY
    c.clientNo,
    c.clientName
;  

切勿在

FROM

子句中使用逗号。始终使用正确、明确、标准、可读的连接语法

您的查询应如下所示：

SELECT C.ClientNo, C.ClientName, 
       COALESCE(TotalExpenses, 0)
FROM CLIENT C LEFT JOIN
     ((SELECT C.IndividualClientNo as ClientNo, SUM(I.Amount) as TotalExpenses
       FROM CASUAL_JOB C JOIN
            INVOICE I
            ON I.JobID = C.JobID
       GROUP BY C.IndividualClientNo
      ) UNION ALL
      (SELECT C.CorporateClientNo as ClientNo, SUM(I.Amount) as TotalExpenses
       FROM CONTRACT_JOB C JOIN
            INVOICE I
            ON I.JobID = C.JobID
       GROUP BY CA.CorporateClientNo
      )
     ) cj
    ON c.ClientNo = cj.ClientNo
GROUP BY C.ClientNo, C.ClientName;

请注意对查询的其他更改：

• 这是一个聚合查询，因此它有一个

  分组依据

• UNION

  现在是

  UNION ALL

  。毕竟，你不想消除重复
• 子查询中不需要将

  JOIN

  连接到

  client

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请阅读Mysql和oracle是两种不同的数据库产品。删除了冲突的产品标签。请加上你实际使用的那个。（+）代表什么？（+）代表左外Joint@P.Salmon这有用吗？对不起，我试图添加表结构。我想做的是，Client有两个子类“CASUAL_JOB和CONTRACT_JOB”，但这两个类在不同的标题下有Client No（Client表的主键）。所以我的目标是找到总成本（发票表中的信息），它与JobID（发票、合同作业、合同作业表中的信息）集成，并从客户表中检索客户信息。