An Introduction to Database Systems 8Ed - C J Date - Solutions Manual Episode 2 Part 8 doc
An Introduction to Database Systems 8Ed - C J Date - Solutions Manual Episode 2 Part 8 doc
... that
Copyright (c) 20 03 C. J. Date page
25 .14
hierarchies at all, consisting of an "SP" class, a "PJ" class, and
a "JS" class.
25 . 12 The performance factors ... and G by C are supported, type constraints are
supported too, and noncircular circles and the like can't occur.
(And run-time type errors specifically can occur only in the...
An Introduction to Database Systems 8Ed - C J Date - Solutions Manual Episode 2 Part 7 doc
...
24 .6 .23 RES ( c1 , c2 ) *═ SPJ ( s, p, j, q ) AND
S ( s, sn, st, c1 ) AND
J ( j, jn, c2 )
? *═ RES ( c1 , c2 )
24 .6 .24 RES ( p ) *═ SPJ ( s, p, j, q ) AND
S ( s, sn, st, c ) AND
J ( j, ... jn, c )
? *═ RES ( p )
24 .6 .25 Can't be done without negation.
24 .6 .26 RES ( p1, p2 ) *═ SPJ ( s, p1, j1 , q1 ) AND
SPJ ( s, p2, j2 , q2 )
? *═ RES ( p1, p2...
An Introduction to Database Systems 8Ed - C J Date - Solutions Manual Episode 1 Part 7 doc
... 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...
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) 20 03 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
( ( SELE...
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
PHON...
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,...
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...
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 ... Copyright (c) 20 03 C. J. Date page 18. 6
These exercises can be used as a basis for class discussion. No
answers provided.
References and Bibliography
References [ 18 .2]...
An Introduction to Database Systems 8Ed - C J Date - Solutions Manual Episode 2 Part 5 pdf
... 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 ... 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 ver...
An Introduction to Database Systems 8Ed - C J Date - Solutions Manual Episode 2 Part 6 pot
... the introductory remark:
(Begin quote)
The "views" mentioned in the titles of references [22 . 3 -2 2. 5],
[22 .10], [22 . 12] , [22 .16], [22 .25 ], [22 . 28 ], [22 .30], and [22 .35]
are not ... Decision Support
Self-explanatory. Observe in particular:
Copyright (c) 20 03 C. J. Date page 22 .8
22 . 12 No answer provided.
*** End of Chapter 22...
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