Introduction to laser technology, Breck Hitz, J.J.Ewing, Jeff Hecht

... S.CITY, UPDATE on SPJ.S#, UPDATE on SPJ.QTY p UPDATE on SPJ.QTY q UPDATE on S.CITY 9.5 a Accepted b Rejected (candidate key uniqueness violation) c Rejected (violates RESTRICT specification) d Accepted ... FORALL JX EXISTS SX ( SX.CITY = JX.CITY ) ; i CONSTRAINT I FORALL JX EXISTS SX EXISTS SPJX ( SX.CITY = JX.CITY AND SX.S# = SPJX.S# AND SPJX .J# = JX .J# ) ; j CONSTRAINT J EXISTS PX ( PX.COLOR = COLOR ... S3 and all shipments for supplier S3 are deleted) e Rejected (violates RESTRICT specification) f Accepted (project J4 and all shipments for project J4 are deleted) g Accepted h Rejected (candidate...

... P.CITY ; 10 .18 .3 CREATE VIEW SP AS SELECT SPJ.S#, SPJ.P#, SUM ( SPJ.QTY ) AS QTY FROM SPJ GROUP BY SPJ.S#, SPJ.P# ; 10 .18 .4 CREATE VIEW JC AS SELECT J. J#, J. CITY FROM J WHERE J. J# IN ( SELECT ... former──but we must be clear And then does "inherently many -to- one" mean, specifically, a foreign-key -to- matching-candidate-key join, or are there other cases that are inherently many -to- one? (If there ... first approach) is to different things depending on whether the join is one -to- one, many -to- one, or many -to- many In other words, the suggestion is that in certain circumstances we can "remove...

... two 11 .12 The first step is to rewrite the given set such that every FD has a singleton right side: AB C BC ACD BE CE CE → → → → → → → C A D B C A F Copyright (c) 2003 C J Date page 11 .7 11 11 CF ... B, C, D appears on the right side of any of the given FDs, it follows that {A,B ,C, D} is a candidate key Copyright (c) 2003 C J Date page 11 .9 *** End of Chapter 11 *** Copyright (c) 2003 C J Date ... distinct irreducible equivalents for the original set of FDs 11 .13 FDs: No answer provided Candidate keys: L, DPC, and DPT 11 .14 Abbreviating NAME, STREET, CITY, STATE, and ZIP* to N, R, C, T, and...