编辑：我想出了空问题。现在我对无效标识符感到困惑。
我的任务是将ER图转换为在SQL中创建的表。
我在下面发布了我的代码，但是我遇到了很多不同的错误。它们大多是重新出现的错误，但有2-3种不同的错误，
有人可以帮我解决这个问题吗？
COMMIT;
CREATE TABLE Team (
Team_ID INTEGER GENERATED ALWAYS AS IDENTITY,
Team_Name NVARCHAR2(40) NOT NULL,
Team_Manager VARCHAR2(20),
CONSTRAINT kkeyconst PRIMARY KEY(Team_ID)
);
COMMIT;
insert into Team(TEAM_NAME, TEAM_MANAGER) VALUES ('Red Sox', 'Jon');
insert into Team(TEAM_NAME, TEAM_MANAGER) VALUES('White Sox', 'Tony');
CREATE TABLE Driver (
Driver_id INTEGER,
Team_ID INTEGER NOT NULL,
Driver_age INTEGER NOT NULL,
Driver_Name VARCHAR(20) NOT NULL,
CONSTRAINT DriverAge CHECK (Driver_age BETWEEN '19' AND '65'),
CONSTRAINT driverpk PRIMARY KEY(Driver_ID),
CONSTRAINT Team_FK FOREIGN KEY (Team_ID) REFERENCES Team(Team_ID)
);
COMMIT;
INSERT INTO Driver(DRIVER_AGE,DRIVER_NAME) VALUES ('21','jon');
INSERT INTO Driver(DRIVER_AGE,DRIVER_NAME) VALUES ('43','Tony');
SELECT * FROM DRIVER;
CREATE TABLE Participation (
Team_ID INTEGER,
Driver_ID INTEGER NOT NULL,
Points INTEGER,
CONSTRAINT Team_FK FOREIGN KEY (Team_ID) REFERENCES Team(Team_ID),
CONSTRAINT Driver_FK FOREIGN KEY(Driver_ID) REFERENCES Driver(Driver_ID)
);
COMMIT;
insert into Participation(Participation_Points) VALUES (150);
INSERT INTO Participation(Participation_Points) VALUES(300);
SELECT * FROM PARTICIPATION;
CREATE TABLE Finish (
Driver_ID INTEGER,
Finish_Position INTEGER NOT NULL,
Finish_Result VARCHAR2(50) NOT NULL,
CONSTRAINT Driver_FK FOREIGN KEY (Driver_ID) REFERENCES Driver(Driver_id)
);
COMMIT;
INSERT INTO Finish(Driver_ID, Finish_POSITION, Finish_Result) VALUES ('3','1','Winner');
INSERT INTO Finish(Driver_ID, Finish_POSITION, Finish_Result) VALUES ('4','3','ThirdPlace');
SELECT * FROM FINISH;
CREATE TABLE RaceComponent (
RC_ID INTEGER,
Driver_ID INTEGER,
RC_Type VARCHAR(25),
CONSTRAINT Rcpk PRIMARY KEY(RC_ID),
CONSTRAINT Driver_FK FOREIGN KEY (Driver_ID) REFERENCES Driver(Driver_ID)
);
COMMIT;
INSERT INTO RaceComponent(RC_ID,RC_TYPE) VALUES ('47','Hot Wheels');
INSERT INTO RaceComponent(RC_ID,RC_TYPE) VALUES ('3', 'Tonka');
SELECT * FROM RACECOMPONENT;
CREATE TABLE Race (
Race_Id INTEGER NOT NULL,
RC_ID INTEGER NOT NULL,
Race_Title VARCHAR(30) NOT NULL,
Race_Location VARCHAR(50) NOT NULL,
Race_Date DATE,
CONSTRAINT RACE_PK PRIMARY KEY(RACE_ID),
CONSTRAINT RC_FK FOREIGN KEY (RC_ID) REFERENCES RaceComponent(RC_ID)
);
COMMIT;
INSERT INTO Race(RACE_TITLE, RACE_LOCATION, RACE_DATE) VALUES ('Tonys Race','Moncton', DATE '2016-04-25');
INSERT INTO Race(Race_Title, Race_Location, Race_Date) VALUES ('Mikes Racing','San-Francisco', DATE '2015-04-25');
SELECT * FROM RACE;
ERROR：
Error starting at line : 29 in command -
INSERT INTO Driver(DRIVER_AGE,DRIVER_NAME) VALUES ('21','jon')
Error report -
SQL Error: ORA-01400: cannot insert NULL into ("STUDENT"."DRIVER"."DRIVER_ID")
01400. 00000 - "cannot insert NULL into (%s)"
*Cause: An attempt was made to insert NULL into previously listed objects.
*Action: These objects cannot accept NULL values.
Error starting at line : 30 in command -
INSERT INTO Driver(DRIVER_AGE,DRIVER_NAME) VALUES ('43','Tony')
Error report -
SQL Error: ORA-01400: cannot insert NULL into ("STUDENT"."DRIVER"."DRIVER_ID")
01400. 00000 - "cannot insert NULL into (%s)"
*Cause: An attempt was made to insert NULL into previously listed objects.
*Action: These objects cannot accept NULL values.
DRIVER_ID TEAMS_ID DRIVER_AGE DRIVER_NAME
---------- ---------- ---------- --------------------
1 21 jon
2 43 Tony
Error starting at line : 34 in command -
CREATE TABLE Participation (
Team_ID INTEGER,
Driver_ID INTEGER NOT NULL,
Points INTEGER,
CONSTRAINT Team_FK FOREIGN KEY (Team_ID) REFERENCES Team(Team_ID),
CONSTRAINT Driver_FK FOREIGN KEY(Driver_ID) REFERENCES Driver(Driver_ID)
)
Error report -
SQL Error: ORA-00955: name is already used by an existing object
00955. 00000 - "name is already used by an existing object"
*Cause:
*Action:
Commit complete.
Error starting at line : 43 in command -
insert into Participation(Participation_Points) VALUES (150)
Error at Command Line : 43 Column : 27
Error report -
SQL Error: ORA-00904: "PARTICIPATION_POINTS": invalid identifier
00904. 00000 - "%s: invalid identifier"
*Cause:
*Action:
Error starting at line : 44 in command -
INSERT INTO Participation(Participation_Points) VALUES(300)
Error at Command Line : 44 Column : 27
Error report -
SQL Error: ORA-00904: "PARTICIPATION_POINTS": invalid identifier
00904. 00000 - "%s: invalid identifier"
*Cause:
*Action:
TEAMNAME_ID DRIVER_ID
--------------------------------------- ----------
POINTSEARNED
---------------------------------------
150
150
150
Commit complete.
Error starting at line : 57 in command -
INSERT INTO Finish(Driver_ID, Finish_POSITION, Finish_Result) VALUES ('3','1','Winner')
Error at Command Line : 57 Column : 48
Error report -
SQL Error: ORA-00904: "FINISH_RESULT": invalid identifier
00904. 00000 - "%s: invalid identifier"
*Cause:
*Action:
Error starting at line : 58 in command -
INSERT INTO Finish(Driver_ID, Finish_POSITION, Finish_Result) VALUES ('4','3','ThirdPlace')
Error at Command Line : 58 Column : 48
Error report -
SQL Error: ORA-00904: "FINISH_RESULT": invalid identifier
00904. 00000 - "%s: invalid identifier"
*Cause:
*Action:
no rows selected
Commit complete.
Error starting at line : 71 in command -
INSERT INTO RaceComponent(RC_ID,RC_TYPE) VALUES ('47','Hot Wheels')
Error report -
SQL Error: ORA-00001: unique constraint (STUDENT.RCPK) violated
00001. 00000 - "unique constraint (%s.%s) violated"
*Cause: An UPDATE or INSERT statement attempted to insert a duplicate key.
For Trusted Oracle configured in DBMS MAC mode, you may see
this message if a duplicate entry exists at a different level.
*Action: Either remove the unique restriction or do not insert the key.
Error starting at line : 72 in command -
INSERT INTO RaceComponent(RC_ID,RC_TYPE) VALUES ('3', 'Tonka')
Error report -
SQL Error: ORA-00001: unique constraint (STUDENT.RCPK) violated
00001. 00000 - "unique constraint (%s.%s) violated"
*Cause: An UPDATE or INSERT statement attempted to insert a duplicate key.
For Trusted Oracle configured in DBMS MAC mode, you may see
this message if a duplicate entry exists at a different level.
*Action: Either remove the unique restriction or do not insert the key.
RC_ID DRIVER1_ID RC_TYPE
---------- ---------- -------------------------
47 Hot Wheels
3 Tonka
Commit complete.
Error starting at line : 89 in command -
INSERT INTO Race(RACE_TITLE, RACE_LOCATION, RACE_DATE) VALUES ('Tonys Race','Moncton', DATE '2016-04-25')
Error report -
SQL Error: ORA-01400: cannot insert NULL into ("STUDENT"."RACE"."RACE_ID")
01400. 00000 - "cannot insert NULL into (%s)"
*Cause: An attempt was made to insert NULL into previously listed objects.
*Action: These objects cannot accept NULL values.
Error starting at line : 90 in command -
INSERT INTO Race(Race_Title, Race_Location, Race_Date) VALUES ('Mikes Racing','San-Francisco', DATE '2015-04-25')
Error report -
SQL Error: ORA-01400: cannot insert NULL into ("STUDENT"."RACE"."RACE_ID")
01400. 00000 - "cannot insert NULL into (%s)"
*Cause: An attempt was made to insert NULL into previously listed objects.
*Action: These objects cannot accept NULL values.
RACE_ID RC_ID RACE_TITLE
---------- ---------- ------------------------------
RACE_LOCATION RACE_DATE
-------------------------------------------------- ---------
1 Tonys Race
Moncton 25-APR-16
43 MikesRacing
San-Francisco 25-APR-15