An Introduction to Database Systems 8Ed - C J Date - Solutions Manual Episode 1 Part 10 pot
An Introduction to Database Systems 8Ed - C J Date - Solutions Manual Episode 1 Part 10 pot
... 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 ... 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 ). ────────── ... such as those discussed earlier in the chapter don't occur with this relvar. Exercise: Check this claim." Answer: It's easy to see that Copyright (c) 2003 C. J. Date page 11 .5...
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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 ... retrieve all required stored record occurrences; next, construct the required conceptual record occurrences; finally, construct the Copyright (c) 2003 C. J. Date page 3.5 ( EMP WHERE EMP# ... is added to the CELLAR table. Copyright (c) 2003 C. J. Date page 2.3 both source and object form, in the dictionary). A comprehensive dictionary will also include cross-reference information,...
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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...
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An Introduction to Database Systems 8Ed - C J Date - Solutions Manual Episode 1 Part 9 pot
... 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 SPJ WHERE SPJ.P# ... 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 ... of both LOCAL and CASCADED forms of WITH CHECK OPTION──and in particular Copyright (c) 2003 C. J. Date page 10 .12 10 .8 Because the result of ORDER BY isn't a relation. 10 .9 The following...
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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 • Read Chapters 3 and 4 very carefully. • 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 ... is physically stored) and access technique (how it is physically accessed). Note: Logical data independence is discussed in Chapters 2, 3, and especially 10 . See also Appendixes A and D. ...
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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) 2003 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...
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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...
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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....
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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 ( ... 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 ... SELECT J. CITY FROM J WHERE J. J# = SPJ .J# ) ; Copyright (c) 2003 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...
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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...
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