Entity Relationship Diagram – ERD and Cardinality Symbols Simple Explanations
Understading cardinality notation and being able to explain them will go a long way in your database design and implementation….
Creating Oracle PL/SQL Tables for Intercollegiate Athletic Database – Data Warehousing
Creating Oracle tables for Intercollegiate Athletic Database. Part of Assignment one of Data Warehousing for Business Intelligence on Coursera
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--1 CREATE TABLE FACILITY CREATE TABLE FACILITY( FACNO VARCHAR(12), FACNAME VARCHAR(255) NOT NULL, CONSTRAINT PK_FAC PRIMARY KEY (FACNO) ); --2.REATE TABLE EMPLOYEE CREATE TABLE EMPLOYEE( EMPNO VARCHAR(12), EMPNAME VARCHAR(255) NOT NULL, DEPARTMENT VARCHAR(100) NOT NULL, EMAIL VARCHAR(50) NOT NULL, PHONE VARCHAR(30) NOT NULL, CONSTRAINT PK_EMP PRIMARY KEY (EMPNO), CONSTRAINT CHK_EMP CHECK(LENGTHB(PHONE) BETWEEN 5 AND 30) ); --3 RESOURCETBL CREATE TABLE RESOURCETBL( RESNO VARCHAR(12), RESNAME VARCHAR(255) NOT NULL, RATE NUMBER(8,2) NOT NULL, CONSTRAINT PK_RES PRIMARY KEY (RESNO) ); /* ALTER TABLE CUSTOMER drop constraint CHK_CUS_ZIP; ALTER TABLE CUSTOMER ADD CONSTRAINT CHK_CUS_ZIP CHECK(LENGTHB(ZIP) <=10) */ --4 CUSTOMER CREATE TABLE CUSTOMER( CUSTNO VARCHAR(12), CUSTNAME VARCHAR(255) NOT NULL, ADDRESS VARCHAR(255) NOT NULL, INTERNAL CHAR(1) NOT NULL, CONTACT VARCHAR(255) NOT NULL, PHONE VARCHAR(30) NOT NULL, CITY VARCHAR(50) NOT NULL, STATE CHAR(2) NOT NULL, ZIP INTEGER NOT NULL, CONSTRAINT PK_CUS PRIMARY KEY (CUSTNO), CONSTRAINT CHK_CUS CHECK (LENGTHB(PHONE) BETWEEN 5 AND 30), CONSTRAINT CHK_CUS_ZIP CHECK(LENGTHB(ZIP) <=10) ); --5 LOCATION CREATE TABLE LOCATION( LOCNO VARCHAR(12), FACNO VARCHAR(12), LOCNAME VARCHAR(255) NOT NULL, CONSTRAINT PK_LOC PRIMARY KEY (LOCNO), CONSTRAINT FK_LOC FOREIGN KEY (FACNO) REFERENCES FACILITY ); -- 6 EVENTREQUEST CREATE TABLE EVENTREQUEST( EVENTNO VARCHAR(12), DATEHELD DATE NOT NULL, DATEREQ DATE NOT NULL, CUSTNO VARCHAR(12), FACNO VARCHAR(12), DATEAUTH DATE NOT NULL, STATUS VARCHAR(20) NOT NULL, ESTCOST NUMBER(8,2) NOT NULL, ESTAUDIENCE INTEGER NOT NULL, BUDNO VARCHAR(12), CONSTRAINT PK_EVR PRIMARY KEY (EVENTNO), CONSTRAINT FK_EVR_CUS FOREIGN KEY (CUSTNO) REFERENCES CUSTOMER, CONSTRAINT FK_EVR_FAC FOREIGN KEY (FACNO) REFERENCES FACILITY, CONSTRAINT CHK_AUD CHECK(ESTAUDIENCE >= 1), CONSTRAINT CHK_STU CHECK(STATUS IN ('Approved', 'Pending', 'Denied')) ); /** LET'S ALLOW NULL VALUES IN THE AUTHORISED DATE, AS we might not as yet have an authorised date**/ ALTER TABLE EVENTREQUEST MODIFY ( DATEAUTH NULL ); --7 EVENTPLAN CREATE TABLE EVENTPLAN( PLANNO VARCHAR(12), EVENTNO VARCHAR(12), WORKDATE DATE NOT NULL, NOTES VARCHAR(1000) NOT NULL, ACTIVITY VARCHAR(500) NOT NULL, EMPNO VARCHAR(12), CONSTRAINT PK_EVP PRIMARY KEY (PLANNO), CONSTRAINT FK_EVP_EVR FOREIGN KEY (EVENTNO) REFERENCES EVENTREQUEST ); /*ALLOW NULL VALUES IN NOTES COLUMN*/ ALTER TABLE EVENTPLAN MODIFY ( NOTES NULL ); -- 8 EVENTPLANLINE CREATE TABLE EVENTPLANLINE( PLANNO VARCHAR(12), LINENO INTEGER NOT NULL, TIMESTART DATE NOT NULL, TIMEEND DATE NOT NULL, NUMBERFLD INTEGER NOT NULL, LOCNO VARCHAR(12), RESNO VARCHAR(12), CONSTRAINT PK_EVPLL PRIMARY KEY (PLANNO, LINENO), CONSTRAINT FK_EVPLL_EVP FOREIGN KEY (PLANNO) REFERENCES EVENTPLAN, CONSTRAINT FK_EVPLL_LOC FOREIGN KEY (LOCNO) REFERENCES LOCATION, CONSTRAINT FK_EVPLL_RES FOREIGN KEY (RESNO) REFERENCES RESOURCETBL ); |
After creating…