An Introduction to Database Systems 8Ed - C J Date - Solutions Manual Episode 1 Part 3 pdf

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

... 14 . Semantic Modeling Part IV : Transaction Management 15 . Recovery 16 . Concurrency Copyright (c) 2003 C. J. Date page fm.5 ã Read Chapters 3 and 4 very carefully. ã Read Chapters ... C. J. Date Copyright (c) 2003 C. J. Date page fm.4 Part V : Further Topics 17 . Security 18 . Optimization 19 . Missing Information 20. Type Inheritance 21. Distributed Databases ... legacy," and The Third Manifesto does include some specific Copyright (c) 2003 C. J. Date page 1. 4 them (they really aren't very difficult). Of course, the exercises can be skipped...

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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-reference information, ... retrieve all required stored record occurrences; next, construct the required conceptual record occurrences; finally, construct the Copyright (c) 20 03 C. J. Date page 3.5 ( EMP WHERE EMP#...

An Introduction to Database Systems 8Ed - C J Date - Solutions Manual Episode 1 Part 3 pdf

... 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 WHERE SPJ.S# = :CS_S# ... Copyright (c) 20 03 C. J. Date page 4 .10 Java──because cursors in SQLJ are replaced by Java "iterator objects" that can be stacked in recursive calls (thanks to an anonymous reviewer...

An Introduction to Database Systems 8Ed - C J Date - Solutions Manual Episode 1 Part 4 pptx

... covered) Read-only vs. Update Operators The distinction between read-only and update operators──another logical difference!──becomes particularly important when we get to inheritance ... fact a scalar update operator specifically, and might object, correctly, that scalar update operators aren't part of the relational model. The discussion of such operators in this chapter ... here, which makes a purely syntactic distinction between operator and function. To be specific, SQL uses function to mean an operator that's invoked by means of classical functional notation──or...

An Introduction to Database Systems 8Ed - C J Date - Solutions Manual Episode 1 Part 5 pptx

... 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 decomposable? ... │ │ │ C │ │ │ a1 │ b1 │ c2 │ │ │ ├════┤ │ ├════┤ │ │ a1 │ b2 │ c1 │ │ │ │ b1 │ │ │ c1 │ │ │ a1 │ b2 │ c2 │ │ │ │ b2 │ │ │ c2 │ │ │ a2 │ b1 │ c1 │ │ │ └────┘ │ └────┘ │ │ a2 │ b1 │ c3 │ │ ... ('S1'), P# P# ('P1'), J# J# (&apos ;J1 '), QTY QTY (200) } Of course, no significance attaches to the order in which the arguments appear in any given tuple selector invocation....

An Introduction to Database Systems 8Ed - C J Date - Solutions Manual Episode 1 Part 6 pot

... 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) 2003 C. J. Date page 7 .15 AND JCITY =/ SCITY ) { S#, P#, J# } 7. 21 P SEMIJOIN ( SPJ SEMIJOIN ( S WHERE CITY = 'London' ... Copyright (c) 2003 C. J. Date page 7 .14 a special case of JOIN, what we really mean is that every specific INTERSECT is a special case of some specific JOIN. Let S_JOIN be such a specific...

An Introduction to Database Systems 8Ed - C J Date - Solutions Manual Episode 1 Part 7 doc

... 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 ( J# :JX, CITY:CITYX ) AND SPJ ( ... S.S#, P.P#, J. J# FROM S, P, J WHERE S.CITY = P.CITY AND P.CITY = J. CITY ; 8 .14 .19 SELECT S.S#, P.P#, J. J# FROM S, P, J Copyright (c) 2003 C. J. Date page 8 .7 And so on. A calculus expression ... SPJX .J# = JX .J# ) 8 .13 .24 SPJX.P# WHERE EXISTS SX EXISTS JX ( SX.CITY = JX.CITY AND SPJX.S# = SX.S# AND SPJX .J# = JX .J# ) 8 .13 .25 SPJX .J# WHERE EXISTS SX EXISTS JX ( SX.CITY =/ JX.CITY AND...

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

... RESTRICT specification) f. Accepted (project J4 and all shipments for project J4 are deleted) g. Accepted h. Rejected (candidate key uniqueness violation) Copyright (c) 2003 C. J. Date page ... EXISTS ( SELECT * FROM J AS JX WHERE EXISTS ( SELECT * FROM J AS JY WHERE ( JX .J# <> JY .J# AND JX.CITY = JY.CITY ) ) ) ) ; e. CREATE ASSERTION SQL_E CHECK ( ( SELECT COUNT(*) FROM ... UPDATE on S.CITY, UPDATE on J. CITY i. INSERT on J, DELETE on S, DELETE on SPJ, UPDATE on S.CITY, UPDATE on J. CITY, UPDATE on SPJ.S#, UPDATE on SPJ .J# j. INSERT on P, DELETE on P, UPDATE...

An Introduction to Database Systems 8Ed - C J Date - Solutions Manual Episode 1 Part 9 pot

... 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 be many -to- one because ... actual values involved right now? Presumably the former──but we must be clear. And then does "inherently many -to- one" mean, specifically, a foreign-key -to- matching-candidate-key join,...

An Introduction to Database Systems 8Ed - C J Date - Solutions Manual Episode 1 Part 10 pot

... more of an art than a science. It's true that there are some scientific principles that can be brought to bear on the problem, and those principles are the subject of Chapters 1 1- 1 3; unfortunately, ... Introduction to Part III *** Copyright (c) 2003 C. J. Date page 11 .4 is constrained to contain at most one tuple (for further discussion, see the answer to Exercise 9 .10 ). ────────── ... answer provided. Candidate keys: L, DPC, and DPT. 11 .14 Abbreviating NAME, STREET, CITY, STATE, and ZIP* to N, R, C, T, and Z, respectively, we have: N → RCT RCT → Z Z → CT An obviously...

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

... 13 .2 MVDs and 4NF Mostly self-explanatory. Possible points for the instructor to note: Copyright (c) 20 03 C. J. Date page 12 . 19 12 . 7 NADDR is in 2NF but not 3NF (and hence not BCNF). ... or even just to BCNF, can unfortunately be in conflict.) Copyright (c) 20 03 C. J. Date page 12 . 15 is at all times equal to a projection of the join of EMP3 and PHONE3 and OFFICE3. Observe ... 12 . 13 However, JOB2A is a projection of SALHIST2 (see below), and JOB2B is a projection of EMP1 (renamed as EMP2 below), so both of these relvars can be discarded. SALHIST1: As with JOB1,...

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

... SPJ { S#, P# } JOIN SPJ { P#, J# } JOIN SPJ { J# , S# } ; Calculus version: CONSTRAINT SPJ_JD SPJ = { SPJX.S#, SPJY.P#, SPJZ .J# } WHERE SPJX.P# = SPJY.P# AND SPJY .J# = SPJZ .J# AND SPJZ.S# ... CTXD1.COURSE = CTXD2.COURSE AND CTXD1.TEACHER = CTXD2.TEACHER AND CTXD1.TEXT = CTXD2.TEXT ) AND ( NOT EXISTS ( SELECT DISTINCT COURSE, TEACHER, TEXT FROM ( ( SELECT DISTINCT COURSE, TEACHER ... Copyright (c) 20 03 C. J. Date page 13.9 CONSTRAINT CTX_MVD CTX = CTX { COURSE, TEACHER } JOIN CTX { COURSE, TEXT } ; Calculus version: CONSTRAINT CTX_MVD CTX = { CTXX.COURSE, CTXX.TEACHER,...

An Introduction to Database Systems 8Ed - C J Date - Solutions Manual Episode 2 Part 3 potx

... T1-T3-T2 : A = 2 T2-T1-T3 : A = 1 T2-T3-T1 : A = 2 Copyright (c) 20 03 C. J. Date page V .2 *** End of Introduction to Part V *** Copyright (c) 20 03 C. J. Date page 16.10 Copyright ... U1, U2, U3, again not necessarily in that order.) Ri-Rj-Rk-Up-Uq-Ur : 3 * 2 * 1 * 3 * 2 * 1 = 36 possibilities Ri-Rj-Up-Rk-Uq-Ur : 3 * 2 * 2 * 1 * 2 * 1 = 24 possibilities Ri-Rj-Up-Uq-Rk-Ur ... the schedule R1-R3-U1-U3-R2-U2 is serializable (it's equivalent to the serial schedule T1-T 3- T2), but it cannot be produced if T1, T2, and T3 all obey the two-phase locking protocol....

An Introduction to Database Systems 8Ed - C J Date - Solutions Manual Episode 2 Part 4 ppsx

... into internal form 2. Convert to canonical form 3. Choose candidate low-level procedures 4. Generate query plans and choose the cheapest In practice, Stage 1 effectively becomes "convert ... different access paths to be deployed (physical data independence). Commercial optimizers do a Copyright (c) 20 03 C. J. Date page 18 .2 reasonably good job on the second aspect* but, strangely, ... and object/relational systems on these ideas? See Chapter 26 , Section 26 .4. See also the Copyright (c) 20 03 C. J. Date page 18.3 and many others. See Appendix A for further discussion....

An Introduction to Database Systems 8Ed - C J Date - Solutions Manual Episode 2 Part 5 pdf

... operators specifically. OPERATOR ROTATE ( T RECTANGLE ) UPDATES T VERSION ROTATE_RECTANGLE ; Copyright (c) 20 03 C. J. Date page 21 .5 Recovery control: Explain two-phase commit very carefully──the ... are clearly more colored circles than there are circles. And colored circles can't be obtained from circles via S by C, either. Note the remark to the effect that "COLORED_CIRCLE ... shown in Fig. 20 .1 is PLANE_FIGURE, of course. 20 .5 22 (this count includes the empty hierarchy). 20 .6 Since all rectangles are centered on the origin, a rectangle ABCD can be uniquely...

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