Example (Cont.) Some members of D+(cont.): ·B>H. Apply the coalescence rule (8);B->>H/holds. Since HC HI and CG -Hand CGHI=,the coalescence rule is satisfied with a being B,B being H,8 being CG, and y being H.We conclude that B->H. ·A>>CG. A>>CGH∥andA>>Hl. By the difference rule,A->>CGHI -HI. Since CGHI-HI=CG.A->CG Database System Concepts-7th Edition 28.7 @Silberschatz,Korth and SudarshanDatabase System Concepts - 7 28.7 ©Silberschatz, Korth and Sudarshan th Edition Example (Cont.) ▪ Some members of D+ (cont.): • B H. Apply the coalescence rule (8); B HI holds. Since H  HI and CG H and CG  HI = Ø, the coalescence rule is satisfied with  being B,  being HI,  being CG, and  being H. We conclude that B H. • A CG. A CGHI and A HI. By the difference rule, A CGHI – HI. Since CGHI – HI = CG, A CG