CREATE TABLE EMP(EMP_ID NUMBER(5), F_NAME VARCHAR2(20) NOT NULL, L_NAME VARCHAR2(20) NOT NULL,
EMAIL VARCHAR2(20) NOT NULL, PHONE_NO NUMBER(10) NOT NULL, HIRE_DATE DATE NOT NULL,
JOB_ID NUMBER(5) NOT NULL, SALARY NUMBER(5) NOT NULL, COMMISSION_PCT NUMBER(5),
MANAGER_ID NUMBER(5) NOT NULL, DEPT_ID NUMBER(5) NOT NULL, PRIMARY KEY (EMP_ID),
CONSTRAINT FK_ED FOREIGN KEY (DEPT_ID) REFERENCES DEPT (DEPT_ID),
CONSTRAINT FK_EDM FOREIGN KEY (MANAGER_ID) REFERENCES DEPT (MANAGER_ID));
When I add this line it is throwing the error ORA-02270.
I have already created the table DEPT which includes dept_id as primary key and manager_id as not null. But when I use foreign key as dept_id there is no error but for manager_id it is throwing the error.
Please help me resolve this.
dept_id is a primary key in DEPT, so you can have a foreign key for it in EMP.
manager_id is just a not-null column in DEPT. As it is not part of the primary key in DEPT, you cannot have a foreign key for it in EMP.
Related
I want to create 3 tables and join them with foreign keys. Unfortunately, it doesn't work and I have no idea where is a mistake.
CREATE TABLE Students (
Student_Id SERIAL PRIMARY KEY,
Name VARCHAR (20) NOT NULL,
Surname VARCHAR (30) NOT NULL,
Date_of_Birth DATE NOT NULL,
Phone INT NOT NULL UNIQUE,
Email VARCHAR(225) NOT NULL UNIQUE,
Course_Id INT
FOREIGN KEY (Course_Id) REFERENCES Course (Course_Id)
);
CREATE TABLE Course (
Course_Id SERIAL PRIMARY KEY,
Student_Id INT NOT NULL,
Teacher_Id INT NOT NULL,
Category VARCHAR (30) NOT NULL,
FOREIGN KEY (Student_Id) REFERENCES Students (Student_Id)
);
CREATE TABLE Teachers (
Teacher_Id SERIAL PRIMARY KEY,
Name VARCHAR (20) NOT NULL,
Surname VARCHAR (30) NOT NULL,
Phone INT NOT NULL UNIQUE,
Salary INT NOT NULL,
Course_Id INT NOT NULL,
FOREIGN KEY (Teacher_Id) REFERENCES Course (Teacher_Id)
);
I should create a Foreign Key to join all three tables.
I get this error every time: relation "course" does not exist
I can't find where is the mistake. Please help.
It appears like you are attempting to crate a many-to-many (M:M) between Students and Teachers with Course as the resolution table. You are close, however, your definition sets up bi-directional relationships. This is normally not necessary. Define Students and Teachers without the FK to Course. Then define Course with a FK to each.
create table students (
student_id serial primary key
, name varchar (20) not null
, surname varchar (30) not null
, date_of_birth date not null
, phone int not null unique
, email varchar(225) not null unique
);
create table teachers (
teacher_id serial primary key
, name varchar (20) not null
, surname varchar (30) not null
, phone int not null unique
, salary int not null
);
create table course (
course_id serial primary key
, student_id int not null
, teacher_id int not null
, category varchar (30) not null
, foreign key (student_id) references students (student_id)
, foreign key (teacher_id) references teachers (teacher_id)
, unique (student_id, teacher_id)
);
If you must define bi-directional FK in Students and Teachers then create the tables without the FK then use alter table after Course is defined to add the FK and make them DEFERRABLE INITIALLY DEFERRED. Necessary for eventual Inserts.
alter table teachers add column course_id int references course(course_id) deferrable initially deferred;
alter table students add column course_id int references course(course_id) deferrable initially deferred;
I have the following tables in postgresql and I would like to make a query using analytical functions to obtain the following results: The name of the athlete, the discipline and the country, A column indicating the best time of the discipline. (REGISTER_MEASURE), A column containing the average time by country and discipline, A column containing the number of participations by country and discipline, A column containing the cumulative of the previous column (we will see at the end the number of participants in the discipline), The information must be sorted by discipline, country and athlete. All in a single output.
CREATE TABLE olympic.tb_discipline (
discipline_id INT NOT NULL,
name CHARACTER VARYING(50) NOT NULL,
inventor CHARACTER VARYING(50) NOT NULL,
type CHARACTER VARYING(10) NOT NULL,
object_type CHARACTER VARYING(20) DEFAULT NULL,
CONSTRAINT ck_discipline_type CHECK (type IN ('RUN', 'JUMP', 'THROW')),
CONSTRAINT pk_discipline PRIMARY KEY (discipline_id)
);
CREATE TABLE olympic.tb_athlete (
athlete_id CHARACTER(7) NOT NULL,
name CHARACTER VARYING(50) NOT NULL,
country CHARACTER VARYING(3) NOT NULL,
substitute_id CHARACTER(7) DEFAULT NULL,
CONSTRAINT pk_athlete PRIMARY KEY (athlete_id),
CONSTRAINT fk_athlete_substitute FOREIGN KEY (substitute_id) REFERENCES olympic.tb_athlete (athlete_id)
);
CREATE TABLE olympic.tb_play (
athlete_id CHARACTER(7) NOT NULL,
discipline_id INT NOT NULL,
CONSTRAINT pk_play PRIMARY KEY (athlete_id, discipline_id),
CONSTRAINT fk_play_athlete FOREIGN KEY (athlete_id) REFERENCES olympic.tb_athlete (athlete_id),
CONSTRAINT fk_play_discipline FOREIGN KEY (discipline_id) REFERENCES olympic.tb_discipline (discipline_id)
);
CREATE TABLE olympic.tb_round (
round_number INT NOT NULL,
discipline_id INT NOT NULL,
CONSTRAINT pk_round PRIMARY KEY (discipline_id, round_number),
CONSTRAINT fk_round_discipline FOREIGN KEY (discipline_id) REFERENCES olympic.tb_discipline (discipline_id)
);
CREATE TABLE olympic.tb_register (
athlete_id CHARACTER(7) NOT NULL,
round_number INT NOT NULL,
discipline_id INT NOT NULL,
register_date DATE NOT NULL DEFAULT CURRENT_DATE,
register_position INT DEFAULT NULL,
register_time TIME DEFAULT NULL,
register_measure REAL DEFAULT NULL,
CONSTRAINT pk_register PRIMARY KEY (athlete_id, round_number, discipline_id),
CONSTRAINT fk_register_athlete FOREIGN KEY (athlete_id) REFERENCES olympic.tb_athlete (athlete_id),
CONSTRAINT fk_register_round FOREIGN KEY (discipline_id, round_number) REFERENCES olympic.tb_round (discipline_id, round_number)
);
I have tried to implement the query similar to the following but I am not getting satisfactory results.
SELECT tb_athlete.name, tb_discipline.name
, tb_athlete.country
, MAX(tb_register.register_measure) OVER (PARTITION BY tb_discipline.name)
, AVG(tb_register.register_time) OVER (PARTITION BY tb_discipline.name)
FROM olympic.tb_athlete
JOIN olympic.tb_register USING (athlete_id)
JOIN olympic.tb_discipline USING (discipline_id);
Image sample
Could you help me with a solution. Thank you!
I have two table: User and Team.
They are in a many-to-many relation.
I would like to get all teams of a specific user.
Seams really simple but I can't find the answer anywhere..
Do you know how can I do ?
On the many-to-many relation must be 3rd table. This table contained user_id and team_id connections.
For example:
CREATE TABLE user (
id serial4 NOT NULL,
first_name varchar(200) NOT NULL,
last_name varchar(200) NULL,
CONSTRAINT user_pk PRIMARY KEY (id)
);
CREATE TABLE team (
id serial4 NOT NULL,
team_name varchar NOT NULL,
team_about text NULL,
CONSTRAINT team_pk PRIMARY KEY (id)
);
CREATE TABLE user_team (
id serial4 NOT NULL,
user_id int4 NOT NULL,
team_id int4 NOT NULL,
CONSTRAINT user_team_pk PRIMARY KEY (id)
);
-- filter and select team by user_id
select t.* from examples.team t
inner join examples.user_team usrt on usrt.team_id = t.id
where usrt.user_id = 2;
My question is similar to the one posted earlier in the Community. questions/62936399/error-sql-state-42703-while-trying-to-insert-data-into-my-table
In PostgreSQL, I'm trying to run CREATE Table Statement so that I can continue with inserting values. Although my CREATE statement fails so I can't get on with INSERT statement. The error message that keeps coming up ERROR: relation "eventrequest" does not exist
SQL state: 42P01
I have re-did the entire CREATE Statement twice although the error message does not change.
CREATE TABLE CUSTOMER
(CustNo VARCHAR(8) CONSTRAINT CustNoNotNull NOT NULL,
CustName VARCHAR(30) CONSTRAINT CustNameNotNull NOT NULL,
Address VARCHAR(50) CONSTRAINT AddressNotNull NOT NULL,
Internal CHAR(1) CONSTRAINT InternalNotNull NOT NULL,
Contact VARCHAR(35) CONSTRAINT ContractNotNull NOT NULL,
Phone VARCHAR(11) CONSTRAINT CPhoneNotNull NOT NULL,
City VARCHAR(30) CONSTRAINT CityNotNull NOT NULL,
State VARCHAR(2) CONSTRAINT StateNotNull NOT NULL,
Zip VARCHAR(10) CONSTRAINT ZipNotNull NOT NULL,
CONSTRAINT PK_CUSTOMER PRIMARY KEY (CustNo)
);
CREATE TABLE FACILITY
(FacNo VARCHAR(8) CONSTRAINT FacNoNotNull NOT NULL,
FacName VARCHAR(30) CONSTRAINT FacNameNotNull NOT NULL,
CONSTRAINT PK_FACILITY PRIMARY KEY (FacNo),
CONSTRAINT Unique_FacName UNIQUE(FacName)
);
CREATE TABLE LOCATION
(LocNo VARCHAR(8) CONSTRAINT LocNoNotNull NOT NULL,
FacNo VARCHAR(8),
LocName VARCHAR(30) CONSTRAINT LocNameNotNull NOT NULL,
CONSTRAINT PK_LOCATION PRIMARY KEY (LocNo),
CONSTRAINT FK_FACNO FOREIGN KEY (FacNo) REFERENCES FACILITY (FacNo)
);
CREATE TABLE EMPLOYEE
(
EmpNo CHAR(11) CONSTRAINT EmpNoNotNull NOT NULL,
EmpName VARCHAR(30) CONSTRAINT EmpNameNotNull NOT NULL,
Department VARCHAR(30) CONSTRAINT DepartmentNotNull NOT NULL,
Email VARCHAR(255) CONSTRAINT EmailNotNull NOT NULL,
Phone VARCHAR(30) CONSTRAINT PhoneNotNull NOT NULL,
CONSTRAINT PK_EMPLOYEE PRIMARY KEY (EmpNo)
);
CREATE TABLE EVENTPLAN
(
PlanNo VARCHAR(8) NOT NULL,
EventNo VARCHAR(8) NOT NULL,
workdate DATE NOT NULL,
notes VARCHAR(40),
activity VARCHAR(20) NOT NULL,
empno VARCHAR(8),
CONSTRAINT PK_PLANNO PRIMARY KEY (PlanNo),
CONSTRAINT FK_EVENTNO FOREIGN KEY (EventNo) REFERENCES EventRequest (EventNo)
);
CREATE TABLE EVENTREQUEST
(
EventNo VARCHAR(8) NOT NULL,
DateHeld DATE NOT NULL,
DateReq DATE NOT NULL,
FacNo VARCHAR(8) NOT NULL,
CustNo VARCHAR(8) NOT NULL,
DateAuth DATE,
Status VARCHAR(8) NOT NULL CHECK (Status IN ('Pending', 'Denied', 'Approved')),
EstCost DECIMAL(10, 2) NOT NULL,
EstAudience INT NOT NULL CHECK (EstAudience > 0),
BudNo VARCHAR(8),
CONSTRAINT PK_EVENTNO PRIMARY KEY (EventNo),
CONSTRAINT FK_FACILITYNOEVENTREQ FOREIGN KEY (FacNo) REFERENCES Facility (FacNo),
CONSTRAINT FK_CUSTOMERNO FOREIGN KEY (CustNo) REFERENCES Customer (CustNo)
);
CREATE TABLE EVENTPLANLINE
(
PlanNo CHAR(8) NOT NULL,
LineNo CHAR(8) NOT NULL,
LocNo CHAR(8) NOT NULL,
ResNo CHAR(8) NOT NULL,
TimeStart TIMESTAMP NOT NULL,
TimeEnd TIMESTAMP NOT NULL,
NumberFLD INTEGER NOT NULL,
CONSTRAINT PK_EVENTPLANLINE PRIMARY KEY (PlanNo, LineNo),
CONSTRAINT FK_EVENTPLAN FOREIGN KEY (PlanNo) REFERENCES EventPlan (PlanNo),
CONSTRAINT FK_LOCATION FOREIGN KEY (LocNo) REFERENCES Location (LocNo),
CONSTRAINT FK_RESOURCETBL FOREIGN KEY (ResNo) REFERENCES ResourceTbl (ResNo)
);
CREATE TABLE RESOURCETBL
(
ResNo CHAR(8) NOT NULL,
ResName VARCHAR(30) NOT NULL,
Rate DECIMAL(8, 2) NOT NULL,
CONSTRAINT PK_RESOURCETBL PRIMARY KEY (ResNo)
);
I need Help with implementing a database in SQL Developer. I tried to implement date constraints but it doesn't work the way I want to.
Here is Office Table:
CREATE TABLE Office (
Office_ID varchar2(7) PRIMARY KEY NOT NULL,
Office_AddressLine varchar2(50) NOT NULL,
Office_PostCode varchar2(8) NOT NULL,
Office_Telephone varchar2(11),
Office_Email varchar2(30), PRIMARY KEY(Office_ID),
CONSTRAINT Office_Email_CK CHECK ( Office_Email like '%_#__%._%')
);
Here is Employee Table:
CREATE TABLE Employee (
Employee_ID varchar2(10) PRIMARY KEY NOT NULL,
Office_ID varchar2(7) NOT NULL,
Emp_FirstName varchar2(20) NOT NULL,
Emp_LastName varchar2(20) NOT NULL,
Emp_Gender varchar2(1) NOT NULL,
Emp_DateOfBirth Date NOT NULL,
Hire_Date date NOT NULL,
Emp_Telephone varchar2(11),
Emp_Email varchar2(30),
Emp_AddressLine varchar2(50) NOT NULL,
Emp_PostCode varchar2(8) NOT NULL,
Emp_Speciality varchar2(20) NOT NULL,
Emp_Qualification varchar2(20) NOT NULL,
Emp_AwardingBody varchar2(30) NOT NULL,
Emp_Salary number(6) NOT NULL,
Employment_History1 varchar2(50),
Employment_History2 varchar2(50),
Employment_History3 varchar2(50) ,
CONSTRAINT fk_staff_office FOREIGN KEY (Office_ID) REFERENCES office (Office_ID),
CONSTRAINT Emp_DateOfBirth_CK CHECK (Emp_DateOfBirth BETWEEN Date '1900-01-01' AND Date '2018-01-01'),
CONSTRAINT Emp_Gender_CK CHECK (Emp_Gender in ('M','F')),
CONSTRAINT Emp_Email_CK CHECK ( Emp_Email like '%_#__%._%')
);
It works this way, but what I want is this:
CREATE TABLE Employee (
Employee_ID varchar2(10) NOT NULL,
Office_ID varchar2(7) NOT NULL,
Emp_FirstName varchar2(20) NOT NULL,
Emp_LastName varchar2(20) NOT NULL,
Emp_Gender varchar2(1) NOT NULL, Emp_DateOfBirth Date NOT NULL,
Hire_Date date NOT NULL,
Emp_Telephone varchar2(11),
Emp_Email varchar2(30),
Emp_AddressLine varchar2(50) NOT NULL,
Emp_PostCode varchar2(8) NOT NULL,
Emp_Speciality varchar2(20) NOT NULL,
Emp_Qualification varchar2(20) NOT NULL,
Emp_AwardingBody varchar2(30) NOT NULL,
Emp_Salary number(6) NOT NULL,
Employment_History1 varchar2(50),
Employment_History2 varchar2(50),
Employment_History3 varchar2(50) ,
PRIMARY KEY (Employee_ID),
CONSTRAINT fk_staff_office FOREIGN KEY (Office_ID) REFERENCES office (Office_ID)
CONSTRAINT fk_staff_patient FOREIGN KEY (Patient_ID) REFERENCES Patient (Patient_ID),
CONSTRAINT Emp_DateOfBirth_CK CHECK (Emp_DateOfBirth BETWEEN Date '1900-01-01' AND Date sysdate),
CONSTRAINT Hire_Date_CK CHECK (Hire_Date <= curdate()),
CONSTRAINT Emp_Gender_CK CHECK (Emp_Gender in ('M','F')),
CONSTRAINT Emp_Email_CK CHECK ( Emp_Email like '%_#__%._%')
);
I don't know why sysdate function or getdate doesn't work and I also don't know how to implement the Constraint about the Hire_Date (I cannot do it with <= relationship). As it is now I have to give up in implementing them even if I will lose points.
Any help will be much appreciated.
You'll need a trigger to enforce such a constraint. Here's an example:
SQL> create table test
2 (
3 employee_id varchar2 (10),
4 hire_date date
5 );
Table created.
SQL> create or replace trigger trg_hd_biu
2 before insert or update of hire_date
3 on test
4 for each row
5 begin
6 if :new.hire_date not between date '1900-01-01' and sysdate
7 then
8 raise_application_error (-20001, 'Hire date out of range');
9 end if;
10 end;
11 /
Trigger created.
SQL> insert into test values ('1', date '2018-01-15');
1 row created.
SQL> insert into test values ('2', date '2018-05-25');
insert into test values ('2', date '2018-05-25')
*
ERROR at line 1:
ORA-20001: Hire date out of range
ORA-06512: at "SCOTT.TRG_HD_BIU", line 4
ORA-04088: error during execution of trigger 'SCOTT.TRG_HD_BIU'
SQL>
I have done it already using another approach (because our teacher doesn't want us to create triggers. We have to make use of constraints only) and it works. Thanks for help any way.
CREATE TABLE Employee (
Employee_ID varchar2(10) PRIMARY KEY NOT NULL,
Office_ID varchar2(7) NOT NULL,
Emp_FirstName varchar2(20) NOT NULL,
Emp_LastName varchar2(20) NOT NULL,
Emp_Gender varchar2(1) NOT NULL,
Emp_DateOfBirth Date NOT NULL,
Hire_Date date NOT NULL,
Emp_CurrentDate date default sysdate,
Emp_Telephone varchar2(11) NOT NULL,
Emp_Email varchar2(30) NOT NULL,
Emp_AddressLine varchar2(50) NOT NULL,
Emp_PostCode varchar2(8) NOT NULL,
Emp_Speciality varchar2(20) NOT NULL,
Emp_Qualification varchar2(20) NOT NULL,
Emp_AwardingBody varchar2(30) NOT NULL,
Emp_Salary number(6) NOT NULL,
Emp_Supervised_By varchar2(10) NOT NULL,
Employment_History1 varchar2(50),
Employment_History2 varchar2(50),
Employment_History3 varchar2(50) ,
CONSTRAINT fk_staff_office FOREIGN KEY (Office_ID) REFERENCES office (Office_ID),
CONSTRAINT Hire_Date_CK check (Hire_Date < Emp_CurrentDate AND (Hire_Date - Emp_DateOfBirth)/365 > 18),
CONSTRAINT Emp_DateOfBirth_CK check (Emp_DateOfBirth > TO_DATE('1900-01-01', 'YYYY-MM-DD')),
CONSTRAINT Emp_Salary_CK check (Emp_Salary > 0 AND Emp_Salary < 150000),
CONSTRAINT Emp_Gender_CK CHECK (Emp_Gender in ('M','F')),
CONSTRAINT Emp_Email_CK CHECK ( Emp_Email like '%_#__%._%'),
CONSTRAINT Emp_Telephone_CK CHECK (regexp_like(Emp_Telephone, '^[0123456789]{11}$') AND Emp_Telephone like '0%'),
CONSTRAINT Emp_FirstName_CK CHECK (regexp_like(Emp_FirstName, '^[ABCDEFGHIJKLMNOPQRSTUVWXYZ]{1,20}$')),
CONSTRAINT Emp_LastName_CK CHECK (regexp_like(Emp_LastName, '^[ABCDEFGHIJKLMNOPQRSTUVWXYZ]{1,20}$')),
CONSTRAINT Emp_PostCode_CK CHECK (regexp_like ( Emp_PostCode , '([Gg][Ii][Rr] 0[Aa]{2})|((([A-Za-z][0-9]{1,2})|(([A-Za-z][A-Ha-hJ-Yj-y][0-9]{1,2})|(([A-Za-z][0-9][A-Za-z])|([A-Za-z][A-Ha-hJ-Yj-y][0-9]?[A-Za-z]))))\s?[0-9][A-Za-z]{2})')),
CONSTRAINT Emp_Speciality_CK CHECK (regexp_like(Emp_Speciality, '^[ABCDEFGHIJKLMNOPQRSTUVWXYZ ]{1,20}$')),
CONSTRAINT Emp_Qualification_CK CHECK (regexp_like(Emp_Qualification, '^[ABCDEFGHIJKLMNOPQRSTUVWXYZ ]{1,20}$')),
CONSTRAINT Emp_AwardingBody_CK CHECK (regexp_like(Emp_AwardingBody, '^[ABCDEFGHIJKLMNOPQRSTUVWXYZ ]{1,30}$'))
);
What I want to do now is to create a constraint that enables me to set the value of the attribute Emp_Supervised_By automatically as the same value of the Employee_ID attribute when the Emp_Speciality is 'Manager'. Thanks in advance for help!