SQL

Visual Explanation illustration and presentation of SQL JOINS query statements

Bydatapandasadmin May 19, 2016May 19, 2016

SQL Joins can sometimes be a bit confusing, particularly if you a newbie.

I have below 2 visual representations which should help enhance your visual understanding of SQL JOINS

First is from From CodeProject, by C L Moffatt

visual representation of SQL joins

You can check full explanation here: Sql Joins visually explained

2. Second was from Duke University.

Join_diagram

This was part of Managing Big Data with MySQL course on Coursera.org

Happy joining!

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Data Warehousing | Oracle

Creating Oracle PL/SQL Tables for Intercollegiate Athletic Database – Data Warehousing

Bydatapandasadmin November 27, 2016November 27, 2016

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 the tables lets insert values

--INSERT RECORDS INTO EVENTPLANLINE

Insert into EVENTPLANLINE (PLANNO,LINENO,TIMESTART,TIMEEND,NUMBERFLD,LOCNO,RESNO) values ('P100',1, to_date('25-OCT-13 8:00:00','DD-MON-RR HH24:MI:SS'), to_date('25-OCT-13 17:00:00','DD-MON-RR HH24:MI:SS'),2,'L100','R100');

Insert into EVENTPLANLINE (PLANNO,LINENO,TIMESTART,TIMEEND,NUMBERFLD,LOCNO,RESNO) values ('P100',2, to_date('25-OCT-13 12:00:00','DD-MON-RR HH24:MI:SS'),to_date('25-OCT-13 17:00:00','DD-MON-RR HH24:MI:SS'), 2,'L101','R101');

Insert into EVENTPLANLINE (PLANNO,LINENO,TIMESTART,TIMEEND,NUMBERFLD,LOCNO,RESNO) values ('P100',3, to_date('25-OCT-13 7:00:00','DD-MON-RR HH24:MI:SS'), to_date('25-OCT-13 16:30:00','DD-MON-RR HH24:MI:SS'), 1,'L102','R102');

Insert into EVENTPLANLINE (PLANNO,LINENO,TIMESTART,TIMEEND,NUMBERFLD,LOCNO,RESNO) values ('P100',4, to_date('25-OCT-13 18:00:00','DD-MON-RR HH24:MI:SS'),to_date('25-OCT-13 22:00:00','DD-MON-RR HH24:MI:SS'),2,'L100','R102');

Insert into EVENTPLANLINE (PLANNO,LINENO,TIMESTART,TIMEEND,NUMBERFLD,LOCNO,RESNO) values ('P101',1, to_date('3-DEC-13 18:00:00','DD-MON-RR HH24:MI:SS'),to_date('3-DEC-13 20:00:00','DD-MON-RR HH24:MI:SS'),2,'L103','R100');

Insert into EVENTPLANLINE (PLANNO,LINENO,TIMESTART,TIMEEND,NUMBERFLD,LOCNO,RESNO) values ('P101',2, to_date('3-DEC-13 18:30:00','DD-MON-RR HH24:MI:SS'),to_date('3-DEC-13 19:00:00','DD-MON-RR HH24:MI:SS'),4,'L105','R100');

Insert into EVENTPLANLINE (PLANNO,LINENO,TIMESTART,TIMEEND,NUMBERFLD,LOCNO,RESNO) values ('P101',3, to_date('3-DEC-13 19:00:00','DD-MON-RR HH24:MI:SS'),to_date('3-DEC-13 20:00:00','DD-MON-RR HH24:MI:SS'),2,'L103','R103');

Insert into EVENTPLANLINE (PLANNO,LINENO,TIMESTART,TIMEEND,NUMBERFLD,LOCNO,RESNO) values ('P102',1, to_date('5-DEC-13 18:00:00','DD-MON-RR HH24:MI:SS'),to_date('5-DEC-13 19:00:00','DD-MON-RR HH24:MI:SS'),2,'L103','R100');

Insert into EVENTPLANLINE (PLANNO,LINENO,TIMESTART,TIMEEND,NUMBERFLD,LOCNO,RESNO) values ('P102',2, to_date('5-DEC-13 18:00:00','DD-MON-RR HH24:MI:SS'),to_date('5-DEC-13 21:00:00','DD-MON-RR HH24:MI:SS'),4,'L105','R100');

Insert into EVENTPLANLINE (PLANNO,LINENO,TIMESTART,TIMEEND,NUMBERFLD,LOCNO,RESNO) values ('P102',3, to_date('5-DEC-13 19:00:00','DD-MON-RR HH24:MI:SS'),to_date('5-DEC-13 22:00:00','DD-MON-RR HH24:MI:SS'),2,'L103','R103');

Insert into EVENTPLANLINE (PLANNO,LINENO,TIMESTART,TIMEEND,NUMBERFLD,LOCNO,RESNO) values ('P103',1, to_date('12-DEC-13 18:00:00','DD-MON-RR HH24:MI:SS'),to_date('12-DEC-13 21:00:00','DD-MON-RR HH24:MI:SS'),2,'L103','R100');

Insert into EVENTPLANLINE (PLANNO,LINENO,TIMESTART,TIMEEND,NUMBERFLD,LOCNO,RESNO) values ('P103',2, to_date('12-DEC-13 18:00:00','DD-MON-RR HH24:MI:SS'),to_date('12-DEC-13 21:00:00','DD-MON-RR HH24:MI:SS'),4,'L105','R100');

Insert into EVENTPLANLINE (PLANNO,LINENO,TIMESTART,TIMEEND,NUMBERFLD,LOCNO,RESNO) values ('P103',3, to_date('12-DEC-13 19:00:00','DD-MON-RR HH24:MI:SS'),to_date('12-DEC-13 22:00:00','DD-MON-RR HH24:MI:SS'),2,'L103','R103');

Insert into EVENTPLANLINE (PLANNO,LINENO,TIMESTART,TIMEEND,NUMBERFLD,LOCNO,RESNO) values ('P104',1, to_date('26-OCT-13 18:00:00','DD-MON-RR HH24:MI:SS'),to_date('26-OCT-13 22:00:00','DD-MON-RR HH24:MI:SS'),4,'L101','R104');

Insert into EVENTPLANLINE (PLANNO,LINENO,TIMESTART,TIMEEND,NUMBERFLD,LOCNO,RESNO) values ('P104',2, to_date('26-OCT-13 18:00:00','DD-MON-RR HH24:MI:SS'),to_date('26-OCT-13 22:00:00','DD-MON-RR HH24:MI:SS'),4,'L100','R104');

Insert into EVENTPLANLINE (PLANNO,LINENO,TIMESTART,TIMEEND,NUMBERFLD,LOCNO,RESNO) values ('P105',1, to_date('25-OCT-13 18:00:00','DD-MON-RR HH24:MI:SS'),to_date('25-OCT-13 22:00:00','DD-MON-RR HH24:MI:SS'),4,'L101','R104');

Insert into EVENTPLANLINE (PLANNO,LINENO,TIMESTART,TIMEEND,NUMBERFLD,LOCNO,RESNO) values ('P105',2, to_date('25-OCT-13 18:00:00','DD-MON-RR HH24:MI:SS'),to_date('25-OCT-13 22:00:00','DD-MON-RR HH24:MI:SS'),4,'L100','R104');

Insert into EVENTPLANLINE (PLANNO,LINENO,TIMESTART,TIMEEND,NUMBERFLD,LOCNO,RESNO) values ('P199',1, to_date('10-DEC-13 8:00:00','DD-MON-RR HH24:MI:SS'), to_date('10-DEC-13 12:00:00','DD-MON-RR HH24:MI:SS'),1,'L100','R100');

Insert into EVENTPLANLINE (PLANNO,LINENO,TIMESTART,TIMEEND,NUMBERFLD,LOCNO,RESNO) values ('P349',1, to_date('12-DEC-13 12:00:00','DD-MON-RR HH24:MI:SS'),to_date('12-DEC-13 15:30:00','DD-MON-RR HH24:MI:SS'),1,'L103','R100');

Insert into EVENTPLANLINE (PLANNO,LINENO,TIMESTART,TIMEEND,NUMBERFLD,LOCNO,RESNO) values ('P85',1, to_date('25-OCT-13 9:00:00','DD-MON-RR HH24:MI:SS'), to_date('25-OCT-13 17:00:00','DD-MON-RR HH24:MI:SS'),5,'L100','R100');

Insert into EVENTPLANLINE (PLANNO,LINENO,TIMESTART,TIMEEND,NUMBERFLD,LOCNO,RESNO) values ('P85',2, to_date('25-OCT-13 8:00:00','DD-MON-RR HH24:MI:SS'), to_date('25-OCT-13 17:00:00','DD-MON-RR HH24:MI:SS'),2,'L102','R101');

Insert into EVENTPLANLINE (PLANNO,LINENO,TIMESTART,TIMEEND,NUMBERFLD,LOCNO,RESNO) values ('P85',3, to_date('25-OCT-13 10:00:00','DD-MON-RR HH24:MI:SS'), to_date('25-OCT-13 15:00:00','DD-MON-RR HH24:MI:SS'),3,'L104','R100');

Insert into EVENTPLANLINE (PLANNO,LINENO,TIMESTART,TIMEEND,NUMBERFLD,LOCNO,RESNO) values ('P95',1, to_date('26-OCT-13 8:00:00','DD-MON-RR HH24:MI:SS'), to_date('26-OCT-13 17:00:00','DD-MON-RR HH24:MI:SS'),4,'L100','R100');

Insert into EVENTPLANLINE (PLANNO,LINENO,TIMESTART,TIMEEND,NUMBERFLD,LOCNO,RESNO) values ('P95',2, to_date('26-OCT-13 9:00:00','DD-MON-RR HH24:MI:SS'), to_date('26-OCT-13 17:00:00','DD-MON-RR HH24:MI:SS'),4,'L102','R101');

Insert into EVENTPLANLINE (PLANNO,LINENO,TIMESTART,TIMEEND,NUMBERFLD,LOCNO,RESNO) values ('P95',3, to_date('26-OCT-13 10:00:00','DD-MON-RR HH24:MI:SS'), to_date('26-OCT-13 15:00:00','DD-MON-RR HH24:MI:SS'),4,'L106','R100');

Insert into EVENTPLANLINE (PLANNO,LINENO,TIMESTART,TIMEEND,NUMBERFLD,LOCNO,RESNO) values ('P95',4, to_date('26-OCT-13 13:00:00','DD-MON-RR HH24:MI:SS'), to_date('26-OCT-13 17:00:00','DD-MON-RR HH24:MI:SS'),2,'L100','R103');

Insert into EVENTPLANLINE (PLANNO,LINENO,TIMESTART,TIMEEND,NUMBERFLD,LOCNO,RESNO) values ('P95',5, to_date('26-OCT-13 13:00:00','DD-MON-RR HH24:MI:SS'), to_date('26-OCT-13 17:00:00','DD-MON-RR HH24:MI:SS'),2,'L101','R104');

-- INSERT RECORDS INTO EVENTPLAN TABLE

Insert into EVENTPLAN (PLANNO,EVENTNO,WORKDATE,NOTES,ACTIVITY,EMPNO) values ('P100','E100','25-OCT-13','Standard operation','Operation','E102');

Insert into EVENTPLAN (PLANNO,EVENTNO,WORKDATE,NOTES,ACTIVITY,EMPNO) values ('P101','E104','03-DEC-13','Watch for gate crashers','Operation','E100');

Insert into EVENTPLAN (PLANNO,EVENTNO,WORKDATE,NOTES,ACTIVITY,EMPNO) values ('P102','E105','05-DEC-13','Standard operation','Operation','E102');

Insert into EVENTPLAN (PLANNO,EVENTNO,WORKDATE,NOTES,ACTIVITY,EMPNO) values ('P103','E106','12-DEC-13','Watch for seat switching','Operation',null);

Insert into EVENTPLAN (PLANNO,EVENTNO,WORKDATE,NOTES,ACTIVITY,EMPNO) values ('P104','E101','26-OCT-13','Standard cleanup','Cleanup','E101');

Insert into EVENTPLAN (PLANNO,EVENTNO,WORKDATE,NOTES,ACTIVITY,EMPNO) values ('P105','E100','25-OCT-13','Light cleanup','Cleanup','E101');

Insert into EVENTPLAN (PLANNO,EVENTNO,WORKDATE,NOTES,ACTIVITY,EMPNO) values ('P199','E102','10-DEC-13','ABC','Operation','E101');

Insert into EVENTPLAN (PLANNO,EVENTNO,WORKDATE,NOTES,ACTIVITY,EMPNO) values ('P299','E101','26-OCT-13',null,'Operation','E101');

Insert into EVENTPLAN (PLANNO,EVENTNO,WORKDATE,NOTES,ACTIVITY,EMPNO) values ('P349','E106','12-DEC-13',null,'Setup','E101');

Insert into EVENTPLAN (PLANNO,EVENTNO,WORKDATE,NOTES,ACTIVITY,EMPNO) values ('P85','E100','25-OCT-13','Standard operation','Cleanup','E102');

Insert into EVENTPLAN (PLANNO,EVENTNO,WORKDATE,NOTES,ACTIVITY,EMPNO) values ('P95','E101','26-OCT-13','Extra security','Cleanup','E102');

-- INSERT RECORDS INTO EVENTREQUEST

Insert into EVENTREQUEST (EVENTNO,DATEHELD,DATEREQ,CUSTNO,FACNO,DATEAUTH,STATUS,ESTCOST,ESTAUDIENCE,BUDNO) values ('E100','25-OCT-13','06-JUN-13','C100','F100','08-JUN-13','Approved',5000,80000,'B1000');

Insert into EVENTREQUEST (EVENTNO,DATEHELD,DATEREQ,CUSTNO,FACNO,DATEAUTH,STATUS,ESTCOST,ESTAUDIENCE,BUDNO) values ('E101','26-OCT-13','28-JUL-13','C100','F100','','Pending',5000,80000,'B1000');

Insert into EVENTREQUEST (EVENTNO,DATEHELD,DATEREQ,CUSTNO,FACNO,DATEAUTH,STATUS,ESTCOST,ESTAUDIENCE,BUDNO) values ('E103','21-SEP-13','28-JUL-13','C100','F100','01-AUG-13','Approved',5000,80000,'B1000');

Insert into EVENTREQUEST (EVENTNO,DATEHELD,DATEREQ,CUSTNO,FACNO,DATEAUTH,STATUS,ESTCOST,ESTAUDIENCE,BUDNO) values ('E102','14-SEP-13','28-JUL-13','C100','F100','31-JUL-13','Approved',5000,80000,'B1000');

Insert into EVENTREQUEST (EVENTNO,DATEHELD,DATEREQ,CUSTNO,FACNO,DATEAUTH,STATUS,ESTCOST,ESTAUDIENCE,BUDNO) values ('E104','03-DEC-13','28-JUL-13','C101','F101','31-JUL-13','Approved',2000,12000,'B1000');

Insert into EVENTREQUEST (EVENTNO,DATEHELD,DATEREQ,CUSTNO,FACNO,DATEAUTH,STATUS,ESTCOST,ESTAUDIENCE,BUDNO) values ('E105','05-DEC-13','28-JUL-13','C101','F101','01-AUG-13','Approved',2000,10000,'B1000');

Insert into EVENTREQUEST (EVENTNO,DATEHELD,DATEREQ,CUSTNO,FACNO,DATEAUTH,STATUS,ESTCOST,ESTAUDIENCE,BUDNO) values ('E106','12-DEC-13','28-JUL-13','C101','F101','31-JUL-13','Approved',2000,10000,'B1000');

Insert into EVENTREQUEST (EVENTNO,DATEHELD,DATEREQ,CUSTNO,FACNO,DATEAUTH,STATUS,ESTCOST,ESTAUDIENCE,BUDNO) values ('E107','23-NOV-13','28-JUL-13','C105','F100','31-JUL-13','Denied',10000,5000,null);

-- INSERT RECORDS INTO LOCATION

Insert into LOCATION (LOCNO,FACNO,LOCNAME) values ('L100','F100','Locker room');

Insert into LOCATION (LOCNO,FACNO,LOCNAME) values ('L101','F100','Plaza');

Insert into LOCATION (LOCNO,FACNO,LOCNAME) values ('L102','F100','Vehicle gate');

Insert into LOCATION (LOCNO,FACNO,LOCNAME) values ('L103','F101','Locker room');

Insert into LOCATION (LOCNO,FACNO,LOCNAME) values ('L104','F100','Ticket Booth');

Insert into LOCATION (LOCNO,FACNO,LOCNAME) values ('L105','F101','Gate');

Insert into LOCATION (LOCNO,FACNO,LOCNAME) values ('L106','F100','Pedestrian gate');

-- INSERT RECORDS INTO FACILITY

Insert into FACILITY (FACNO,FACNAME) values ('F100','Football stadium');

Insert into FACILITY (FACNO,FACNAME) values ('F101','Basketball arena');

Insert into FACILITY (FACNO,FACNAME) values ('F102','Baseball field');

Insert into FACILITY (FACNO,FACNAME) values ('F103','Recreation room');

-- INSERT RECORDS into RESOURCETBL

Insert into RESOURCETBL (RESNO,RESNAME,RATE) values ('R100','attendant',10);

Insert into RESOURCETBL (RESNO,RESNAME,RATE) values ('R101','police',15);

Insert into RESOURCETBL (RESNO,RESNAME,RATE) values ('R102','usher',10);

Insert into RESOURCETBL (RESNO,RESNAME,RATE) values ('R103','nurse',20);

Insert into RESOURCETBL (RESNO,RESNAME,RATE) values ('R104','janitor',15);

Insert into RESOURCETBL (RESNO,RESNAME,RATE) values ('R105','food service',10);

-- insert records into CUSTOMER TABLE

Insert into CUSTOMER (CUSTNO,CUSTNAME,ADDRESS,INTERNAL,CONTACT,PHONE,CITY,STATE,ZIP) values ('C100','Football','Box 352200','Y','Mary Manager','6857100','Boulder','CO','80309');

Insert into CUSTOMER (CUSTNO,CUSTNAME,ADDRESS,INTERNAL,CONTACT,PHONE,CITY,STATE,ZIP) values ('C101','Men''s Basketball','Box 352400','Y','Sally Supervisor','5431700','Boulder','CO','80309');

Insert into CUSTOMER (CUSTNO,CUSTNAME,ADDRESS,INTERNAL,CONTACT,PHONE,CITY,STATE,ZIP) values ('C103','Baseball','Box 352020','Y','Bill Baseball','5431234','Boulder','CO','80309');

Insert into CUSTOMER (CUSTNO,CUSTNAME,ADDRESS,INTERNAL,CONTACT,PHONE,CITY,STATE,ZIP) values ('C104','Women''s Softball','Box 351200','Y','Sue Softball','5434321','Boulder','CO','80309');

Insert into CUSTOMER (CUSTNO,CUSTNAME,ADDRESS,INTERNAL,CONTACT,PHONE,CITY,STATE,ZIP) values ('C105','High School Football','123 AnyStreet','N','Coach Bob','4441234','Louisville','CO','80027');

-- insert records into EMPLOYEE TABLE

Insert into EMPLOYEE (EMPNO,EMPNAME,DEPARTMENT,EMAIL,PHONE) values ('E100','Chuck Coordinator','Administration','chuck@colorado.edu','3-1111');

Insert into EMPLOYEE (EMPNO,EMPNAME,DEPARTMENT,EMAIL,PHONE) values ('E101','Mary Manager','Football','mary@colorado.edu','5-1111');

Insert into EMPLOYEE (EMPNO,EMPNAME,DEPARTMENT,EMAIL,PHONE) values ('E102','Sally Supervisor','Planning','sally@colorado.edu','3-2222');

Insert into EMPLOYEE (EMPNO,EMPNAME,DEPARTMENT,EMAIL,PHONE) values ('E103','Alan Administrator','Administration','alan@colorado.edu','3-3333');

In case you want to change a constraint on a field, you can use a syntax examples as the following. ALTER TABLE FACILITY ADD CONSTRAINT UNQ_FAC UNIQUE (FACNAME)…

Data Warehousing | SQL

Drop Shipping Ecommerce Database ER Diagram and Conceptual Modeling
Bydatapandasadmin February 18, 2017February 19, 2017

In this short article, we look at a sample ERD Diagram which is designed using ER-Assistant software (usage of this software is covered here: How To Use ER Assistant) after we have finished with the Conceptual Modeling. Hence in the first place, we have to gather some Data requirements. This involves business logic and requirements,…

Read More Drop Shipping Ecommerce Database ER Diagram and Conceptual Modeling
SQL | Uncategorized

MySQL – Summarizing Data – SUM COUNT -MIN -MAX – AVG – DOGNITION Database
Bydatapandasadmin May 12, 2016October 23, 2016

Summarizing Data This week we are looking at five most common aggregate functions used to summarize information stored in tables: COUNT and SUM very frequently. COUNT is the only aggregate function that can work on any type of variable. The other four aggregate functions are only appropriate for numerical data. All aggregate functions require you…

Read More MySQL – Summarizing Data – SUM COUNT -MIN -MAX – AVG – DOGNITION Database
Data Warehousing | Oracle | SQL | Teradata | Transact-SQL

Free Entity Relationship and Relational Schema Diagram Tool
Bydatapandasadmin November 27, 2016February 19, 2017

ERDPLUS One tool I generally use when working on a projects, mini tasks and exploration is the ERDPLUS tool . It is quite simple and easy to use. It is a Free tool as well. Below are some diagrams I generated when i first got in contact with with tool. ERD DIAGRAMS: 1. 2. A…

Read More Free Entity Relationship and Relational Schema Diagram Tool
Transact-SQL

Get Numbers and Percentages from Tables – Microsoft Sql Server
Bydatapandasadmin October 2, 2016

Sometimes you want to get some numbers and also percentages for quick analysis. This is a quick simple way to get quick overviews Want more information like this?

Read More Get Numbers and Percentages from Tables – Microsoft Sql Server

SQL | Transact-SQL

Pyodbc Sqlalchemy Python 2 and 3 SQL Server Native Client 11.0

Bydatapandasadmin April 18, 2021April 18, 2021

This is a sample code to use Python to connect to SQL Server Native Client.

import sqlalchemy

import pyodbc

try:

import urllib

params = urllib.quote_plus("DRIVER={SQL Server Native Client 11.0};SERVER=.\MSSQLSERVER_ENT;DATABASE=MagicDirect;Trusted_Connection=yes;")

Visual Explanation illustration and presentation of SQL JOINS query statements

Creating Oracle PL/SQL Tables for Intercollegiate Athletic Database – Data Warehousing

Drop Shipping Ecommerce Database ER Diagram and Conceptual Modeling

MySQL – Summarizing Data – SUM COUNT -MIN -MAX – AVG – DOGNITION Database

Free Entity Relationship and Relational Schema Diagram Tool

Get Numbers and Percentages from Tables – Microsoft Sql Server

Pyodbc Sqlalchemy Python 2 and 3 SQL Server Native Client 11.0

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