Fig. $2\mathrm{.}2.$ Example Database

EMP

$\backslash$table$[[$ENO$,$ENAME,TITLE$],[$E$1,$J$.$ Doe,Elect. Engineer$],[$E$2,$M$.$ Smith,Syst$.$ Anal.$],[$E$3,$A$.$ Lee,Mech. Eng.$],[$E$4,$J$.$ Miller,Programmer$],[$E$5,$B$.$ Casey,Syst$.$ Anal.$],[$E$6,$L$.$ Chu,Elect. Eng.$],[$E$7,$R$.$ Davis,Mech. Eng.$],[$E$8,$J$.$ Jones,Syst$.$ Anal.$]]$

ASG

$\backslash$table$[[$ENO$,$PNO,RESP,DUR$],[$E$1,P1,$Manager,$12],[$E$2,P1,$Analyst,$24],[$E$2,P2,$Analyst,$6],[$E$3,P3,$Consultant,$10],[$E$3,P4,$Engineer,$48],[$E$4,P2,$Programmer,$18],[$E$5,P2,$Manager,$24],[$E$6,P4,$Manager,$48],[$E$7,P3,$Engineer,$36],[$E$8,P3,$Manager,$40]]$

PROJ

PAY

$\backslash$table$[[$PNO$,$PNAME,BUDGET,LOC$],[$P$1,$Instrumentation,$150000,$Montreal$],[$P$2,$Database Develop.,$135000,$New York$],[$P$3,$CAD$/$CAM$,250000,$New York$],[$P$4,$Maintenance,$310000,$Paris$]]$

$\backslash$table$[[$TITLE$,$SAL$],[$Elect$.$ Eng.,$40000],[$Syst$.$ Anal.,$34000],[$Mech$.$ Eng.,$27000],[$Programmer$,24000]]$