An Introduction to Database Systems 8Ed - C J Date - Solutions Manual Episode 1 Part 2 potx

... deliberate, and so is the lack of reference to the ACID acronym.) Superficial!──this is just an introduction. Forward references to Chapters 15 and 16 . 3.9 The Suppliers-and-Parts DB ... is added to the CELLAR table. Copyright (c) 20 03 C. J. Date page 2. 3 both source and object form, in the dictionary). A comprehensive dictionary will also include cross-r...

Ngày tải lên: 06/08/2014, 01:21

... C. J. Date Copyright (c) 20 03 C. J. Date page fm.4 Part V : Further Topics 17 . Security 18 . Optimization 19 . Missing Information 20 . Type Inheritance 21 . Distributed Databases 22 . ... Databases 22 . Decision Support 23 . Temporal Databases 24 . Logic-Based Databases Part VI : Objects, Relations, and XML 25 . Object Databases 26 . Object/Relational Da...

Ngày tải lên: 06/08/2014, 01:21

... CS_SC ; EXEC SQL OPEN CJ ; DO for all J rows accessible via CJ ; EXEC SQL FETCH CJ INTO :CJ _J# , :CJ_JN, :CJ_JC ; print CJ _J# , CJ_JN, CJ_JC ; END DO ; EXEC SQL CLOSE CJ ; END DO ; EXEC SQL ... SELECT S.S#, S.SNAME, S.STATUS, S.CITY FROM S ORDER BY S# ; EXEC SQL DECLARE CJ CURSOR FOR SELECT J. J#, J. JNAME, J. CITY FROM J WHERE J. J# IN ( SELECT SPJ .J# FROM SPJ...

Ngày tải lên: 06/08/2014, 01:21

... center of circle c */ a. OPERATOR DIAMETER ( C CIRCLE ) RETURNS LENGTH ; RETURN ( 2 * THE_R ( C ) ) ; END OPERATOR ; OPERATOR CIRCUMFERENCE ( C CIRCLE ) RETURNS LENGTH ; RETURN ( 3 .14 159 ... ( BB CARTESIAN, EE CARTESIAN ) NOT FINAL ; 5 .17 See Answer 4 .1 and Answer 5 .16 . 5 .18 No answer provided. 5 .19 See Section 5.7, subsection "Structured Types."...

Ngày tải lên: 06/08/2014, 01:21

... │ │ │ C │ │ │ a1 │ b1 │ c2 │ │ │ ├════┤ │ ├════┤ │ │ a1 │ b2 │ c1 │ │ │ │ b1 │ │ │ c1 │ │ │ a1 │ b2 │ c2 │ │ │ │ b2 │ │ │ c2 │ │ │ a2 │ b1 │ c1 │ │ │ └────┘ │ └────┘ │ │ a2 │ b1 │ c3 │ │ ... decomposed (e.g., into decimal digits, or into integer and fractional parts) in suitable circumstances; so is a number atomic? What about bit and character strings, which are obviously de...

Ngày tải lên: 06/08/2014, 01:21

... ) JOIN SPJ JOIN ( J RENAME CITY AS JCITY ) ) { SCITY, JCITY } 7 .24 ( J JOIN SPJ JOIN S ) { P# } 7 .25 ( ( ( J RENAME CITY AS JCITY ) JOIN SPJ JOIN ( S RENAME CITY AS SCITY ) ) WHERE JCITY ... constraints, which is why Chapters 7 and 8 precede Chapter 9. Copyright (c) 20 03 C. J. Date page 7 .15 AND JCITY =/ SCITY ) { S#, P#, J# } 7. 21 P SEMIJOIN ( SPJ SEMIJOI...

Ngày tải lên: 06/08/2014, 01:21

... SELECT J. CITY FROM J WHERE J. J# = SPJ .J# ) ; Copyright (c) 20 03 C. J. Date page 8 .22 J ( J# :JX, CITY:'London' ) ) 8 .15 .34 JX WHERE EXISTS PX ( SPJ ( P#:PX, J# :JX ) AND SPJ ... S#:SX, CITY:CITYX ) AND J ( J# :JY, CITY:CITYY ) AND SPJ ( S#:SX, J# :JY ) ) 8 .15 .24 PX WHERE EXISTS SX EXISTS JX EXISTS CITYX ( S ( S#:SX, CITY:CITYX ) AND J...

Ngày tải lên: 06/08/2014, 01:21

... RESTRICT specification) f. Accepted (project J4 and all shipments for project J4 are deleted) g. Accepted h. Rejected (candidate key uniqueness violation) Copyright (c) 20 03 C. J. Date page ... usual conventions regarding the definition and naming of range variables. Copyright (c) 20 03 C. J. Date page 9 . 12 d. CONSTRAINT D FORALL JX FORALL JY ( IF JX .J# =/...

Ngày tải lên: 06/08/2014, 01:21

... BY SPJ.S#, SPJ.P# ; 10 .18 .4 CREATE VIEW JC AS SELECT J. J#, J. CITY FROM J WHERE J. J# IN ( SELECT SPJ .J# FROM SPJ WHERE SPJ.S# = S# ( 'S1' ) ) AND J. J# IN ( SELECT SPJ .J# FROM ... have to face up to questions such as: Does (e.g.) many -to- one mean a relationship that's inherently, necessarily many -to- one, or does it mean one that just happens to...

Ngày tải lên: 06/08/2014, 01:21

... can change the status for London from 20 to 30 by changing it once and for all in the relevant CS tuple. 12 .3 1NF, 2NF, 3NF Mostly self-explanatory. Another nice intuitive characterization ... 1. A → B 2. AB → C 3. D → AC 4. D → E Now, 3 can be replaced by: 3. D → A and D → C Next, 1 and 2 together imply that 2 can be replaced by: 2. A → C But now...

Ngày tải lên: 06/08/2014, 01:21