Does this query:

$\backslash$pi $\_($tutor$.$name$)((\backslash$sigma $\_(($tutor$.$role$=^\text{'}$tutor$^\text{'}))($TEACH$(\backslash$rho $\_(($uid$,$staffname$))$ STAFF$))(\backslash$sigma $\_(($course$.$level$=2000)($convener$.$name$=$'Graham'$))$ COURSE$$TEACH$))$

Answer this question:

Consider the following relational database schema S$,$ representing a simplified account of ANU teaching arrangements: staff $=\{$uid$,$ name$\}$

primary key: $\{$uid$\}$

course $=\{$ccode$,$ name, level$\}$

primary key: $\{$ccode$\}$

teach $=\{$uid$,$ ccode, sem, year, role$\}$ primary key: $\{$uid$,$ ccode, sem, year$\}$ foreign key: $[$uid$]$ staff$[$uid$]$ foreign key: $[$ccode$]$ course$[$ccode$]$

and the following SQL query:

$$ list the names of all tutors in $2000$level courses convened by Graham select tutor.name

from $($staff join teach on $($staff$.$uid $=$ teach.uid$))$ as tutor,

$($staff join teach on $($staff$.$uid $=$ teach.uid$))$ as convener,

course

where tutor.ccode $=$ convener.ccode

and tutor.sem $=$ convener.sem

and tutor.year $=$ convener.year and convener.role $=$ 'convener' and tutor.role $=$ 'tutor'

and convener.ccode $=$ course.ccode and convener.name $=$ 'Graham'

and course.level $=2000$;