Contoh Soal UAS Pada Basis Data

Contoh Soal UAS Pada Basis Data

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Dikarenakan penulis baru saja melewati masa Ujian Akhir Semester Mata Kuliah Basis Data , maka akan diposting beberapa soal yang muncul untuk Program Jurusan Sistem Informasi Semester Dua di Universitas Gunadarma .


UAS Basis Data Jurusan Sistem Informasi

1. Tuliskan pengertian dari atomicity dan consistency sebagai properti dari transaksi basis data !
   - atomicity adalah semua operasi (permintaan SQL) dari transaksi harus diselesaikan jika tidak maka transaksi dibatalkan .
   - consistency adalah ketika transaksi diselesaikan , database harus dalam kondisi konsisten , jika tidak ada bagian transaksi yang melanggar batasan integritas maka seluruh transaksi dibatalkan .

2. Tuliskan manfaat dan penggunaan perintah ROLLBACK dan COMMIT !
   - Rollback adalah perintah yang mengakhiri transaksi dan membatalkan seluruh perubahan-perubahan yang dibuat selama transaksi .
   - Commit adalah perintah yang mengakhiri transaksi dan membuat setiap perubahan selama transaksi tersebut menjadi permanen .

3. Tuliskan perbedaan pengertian antara fragmentasi vertikal dan fragmentasi horizontal pada sistem basis data terdistribusi ! Berikan contohnya !
   - Vertikal adalah Pembagian Relasi menjadi Fragment dari baris
   - Horizontal adalah Pembagian Relasi menjadi Fragment dari kolom

Studi Kasus untuk nomor 4 dan 5 !

Perhatikan tabel-tabel berikut ini :

Tabel SISWA
NIS
Nama
Alamat
S023
Indra Lesmana
Mangga Dua
S024
Suci Indah
Penjaringan
S025
Endang
Tanjung Priok
S026
Ahmad F
Kebon Pala
Tabel NILAI 

NIS
Mata Pelajaran
Nilai
Semester
S023
Biologi
75
3
S024
Kimia
80
3
S025
Biologi
65
3
S026
Sejarah
80
4

4. Tuliskan semua pernyataan DDL untuk membuat tabel dan mengisi data tabel diatas !
CREATE TABLE SISWA (NIS VARCHAR(10),Nama VARCHAR(30),Alamat VARCHAR(40),PRIMARY KEY(NIS));
INSERT INTO SISWA VALUES ('S023','Indra Lesmana','Mangga Dua');
INSERT INTO SISWA VALUES ('S024','Suci Indah','Penjaringan');
INSERT INTO SISWA VALUES ('S025','Endang','Tanjung Priok');
INSERT INTO SISWA VALUES ('S026','Ahmad F','Kebon Pala');
CREATE TABLE NILAI (NIS VARCHAR(10),Mata_Pelajaran VARCHAR(30),Nilai INTEGER(5),Semester INTEGER(20),FOREIGN KEY(NIS));
INSERT INTO NILAI VALUES ('SO23','Biologi','75','3');
INSERT INTO NILAI VALUES ('SO24','Kimia','80','3');
INSERT INTO NILAI VALUES ('SO25','Biologi','65','3');
INSERT INTO NILAI VALUES ('SO26','Sejarah','80','4');
5. Tuliskanlah perintah SQL untuk :
a) Menambahkan SISWA baru yang bernama Yanti dan tinggal di Kwitang Baru .
b) Menampilkan jumlah data nilai di semester 3 pada tabel Nilai diatas .
c) Menampilkan nama-nama siswa yang memperoleh nilai lebih dari 70 .
d) Menampilkan data nilai siswa yang bernama Indra Lesmana .
e) Mengubah alamat Ahmad menjadi di Depok Utara .
a) INSERT INTO SISWA (Nama,Alamat) VALUES ('Yanti','Kwitang Baru');
b) SELECT Nilai , COUNT(Nilai) FROM NILAI WHERE Semester = '3';
c) SELECT * FROM SISWA WHERE Nilai>70;
d) SELECT * FROM NILAI WHERE Nama = 'Indra Lesmana';
e) UPDATE SISWA SET Alamat = 'Depok Utara' WHERE Alamat='Kebon Pala';

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