CSI 3317 (LAB 2)

Data Manipulation Language

Working With Database INSERT INTO location VALUES (53, 'ADMN', '424', 1);  INSERT INTO location VALUES (54, 'ADMN', '402', 1);  INSERT INTO location VALUES (45, 'SITE', '101', 150);  INSERT INTO location VALUES (46, 'SITE', '202', 40);  INSERT INTO location VALUES (47, 'CBY', '103', 35);  INSERT INTO location VALUES (48, 'SITE', '103', 40);  INSERT INTO location VALUES(49, 'ADMN', '105', 42);

Data Manipulation Language

SELECT [DISTINCT | ALL]{* | <ColExpression> [AS <newName>]] [,..]}

FROM <TABLEName>[WHERE <condition>][GROUP BY <ColList>] [HAVING <condition>][ORDER BY <ColList>]  Groups are those rows with the same Column Values  Only SELECT and FROM are mandatory

Data Manipulation Language

Select all rows and all columns: SELECT * FROM location;

Calculated Fields: SELECT locid, bldg_code, room, capacity/2 AS

ExamCapacity FROM location;

List all rooms whose capacity is greater than 30  SELECT locid, bldg_code, room, capacity FROM

location WHERE capacity > 30;

Data Manipulation Language List all rooms whose capacity is greater than 30 and

is located in administration building  SELECT locid, bldg_code, room, capacity FROM

location WHERE (capacity > 30 AND bldg_code = ‘ADMN’);

List all rooms whose capacity is between 30 and 50 and are in SITE building.

SELECT locid, bldg_code, room, capacity FROM location WHERE (capacity BETWEEN 30 AND 50) AND (bldg_code = ‘SITE’);

Data Manipulation Language

List all SITE and CBY rooms (Use Set Membership)   SELECT locid, bldg_code, room, capacity FROM

location WHERE bldg_code IN (‘SITE’, ‘CBY’);

 Can also use NOT IN, e.g NOT IN (‘ADMIN’);

Data Manipulation Language

Find all rooms with string ‘C’ in their Building code  SELECT locid, bldg_code, room, capacity FROM

location WHERE bldg_code LIKE ‘%C%’;

Regular expression can be made using % = zero or more chars or _ (underscore) any character,

example ‘%K_____%’

Data Manipulation Language

List all rooms in order of their Building Code and their room numbers  SELECT locid, bldg_code, room, capacity FROM

location ORDER BY bldg_code, room ;

MULTI-TABLE QUERIESLOCID BLDG_CODE ROOM CAPACITY

45 SITE 101 15046 SITE 102 4047 CBY 103 3548 SITE 103 4049 ADMN 105 4253 ADMN 424 154 ADMN 402 1

FID FLNAME FFNAME FMI LOCID FPHONE FRANK FPIN1 Cox Kim J 53 7155551234

 ASSO 1181

2 Blanchard 

John R 54 7155559087 

FULL 1075

3 Williams Jerry F 56 7155555412 

ASST 8531

4 Perry Laura M 55 7155556409 

INST 1690

5 Brown Phillip E 57 7155556082 

ASSO 9899

MULTI-TABLE QUERIES CREATE TABLE faculty (fid NUMBER(5) CONSTRAINT faculty_fid_pk PRIMARY KEY, flname VARCHAR2(30) CONSTRAINT faculty_flname_nn NOT NULL, ffname VARCHAR2(30) CONSTRAINT faculty_ffname_nn NOT NULL, fmi CHAR(1), locid NUMBER(5) CONSTRAINT faculty_locid_fk REFERENCES location(locid), fphone VARCHAR2(10), frank VARCHAR2(8) CONSTRAINT faculty_frank_cc CHECK ((frank = 'ASSO') OR (frank = 'FULL') OR (frank = 'ASST') OR (frank = 'INST')), fpin NUMBER(4) CONSTRAINT faculty_fpin_uk UNIQUE, startdate DATE);

MULTI-TABLE QUERIESINSERT INTO faculty VALUES (1, 'Cox', 'Kim', 'J', 53, '7155551234',

'ASSO', 1181, TO_DATE('09/15/1990', 'MM/DD/YYYY'));

INSERT INTO faculty VALUES (2, 'Blanchard', 'John', 'R', 54, '7155559087', 'FULL', 1075, TO_DATE('01/12/1972', 'MM/DD/YYYY'));

INSERT INTO faculty VALUES (3, 'Williams', 'Jerry', 'F', 56, '7155555412', 'ASST', 8531, TO_DATE('08/26/1992', 'MM/DD/YYYY'));

INSERT INTO faculty VALUES (4, 'Perry', 'Laura', 'M', 55, '7155556409', 'INST', 1690, TO_DATE('01/22/1995', 'MM/DD/YYYY'));

INSERT INTO faculty VALUES (5, 'Brown', 'Philip', 'E', 57, '7155556082', 'ASSO', 9899, TO_DATE('08/15/1985', 'MM/DD/YYYY'));

CARTESIAN PRODUCT

LOCID

BLDG_CODE

ROOM

CAPACITY

FID

FLNAME

FFNAME FMI LOCID FPHONE FRANK

FPIN

35 Rows of Data

Algorithm for JOIN in SQL:

1. Cartesian Product of Tables (specified in the FROM clause)

2. Selection of rows that match (e.g. predicate in the WHERE clause)

3. Project columns specified in the SELECT Clause

SELECT * FROM Location, Faculty;

Cartesian Product followed by Selection  SELECT L.*, F.* FROM Location L, Faculty P

WHERE L.LOCID = F.LOCID;

Order by  SELECT F.FPHONE, L.ROOM

FROM Location L, Faculty P WHERE L.LOCID = F.LOCID;ORDER BY L.ROOM, F.FPHONE;

SET OPERATIONS

The Relations must be set operations (union|Intersect|difference) compatible:

Same number of attributes Identical attributes in terms of domains,

datatypes and lengths Only the number of tuples or rows can be

different

SET OPERATIONSUNION List all Locations where the Capacity is less than 10 or there

Faculty in that room (SELECT LOCID FROM Location WHERE capacity < 10)UNION(SELECT LOCID FROM Faculty);

Delete a record 

DELETE FROM FacultyWHERE FID = 53;