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Query Tree (Initial Tree)

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Presentasi berjudul: "Query Tree (Initial Tree)"— Transcript presentasi:

1 Query Tree (Initial Tree)
BASIS DATA 20 Query Tree (Initial Tree) 1

2 Narasi Tampilkan Nomor proyek, Nomor departemen,Nama akhir pegawai,
alamat dan tanggal lahir dari manajer Depertemen yang membawahi Project yang berlokasi di “Stafford”

3 SQL SELECT P.PNUMBER, D.DNUMBER, E.LNAME, E.ADDRESS, E.BDATE
FROM EMPLOYEE E, DEPARTEMEN D, PROJECT P WHERE P.PLOCATION = “Stafford” AND D.DNUMBER = P.DNUM AND E.SSN = D.MGRSSN

4 Aljabar Relasi π P.PNUMBER, D.DNUMBER, E.LNAME, E.ADDRESS, E.BDATE (δP.PLOCATION = “Stafford” ^ D.DNUMBER = P.DNUM ^ E.SSN=D.MGRSSN)

5 δP.PLOCATION= “Stafford” ^
Initial Tree π P.PNUMBER, D.DNUMBER, E.LNAME, E.ADDRESS, E.BDATE δP.PLOCATION= “Stafford” ^ D.DNUMBER = P.DNUM ^ E.SSN=D.MGRSSN X X E P D


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