PRAKTIKUM 3 PEMROGRAMAN
BASIS DATA
Menghapus baris
Deleting rows- DELETE FROM
Use the DELELE FROM command to delete row(s) from
a table, with the following syntax:
-- Delete all rows from the table. Use with extreme
care! Records are NOT recoverable!!!
DELETE FROM tableName
-- Delete only row(s) that meets the criteria
DELETE FROM tableName WHERE criteria
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contoh
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mysql> DELETE FROM products WHERE name LIKE
'Pencil%';
mysql> SELECT * FROM products;
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Beware that "DELETE FROM tableName" without a
WHERE clause deletes ALL records from the table.
Even with a WHERE clause, you might have deleted
some records unintentionally. It is always advisable to
issue a SELECT command with the same WHERE
clause to check the result set before issuing the
DELETE (and UPDATE).
Loading/exporting data from/to a
text file
There are several ways to add data into the
database:
(a) manually issue the INSERT commands;
(b) run the INSERT commands from a script;
(c) load raw data from a file using LOAD DATA or
via mysqlimport utility.
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LOAD DATA LOCAL INFILE ... INTO
TABLE ...
Besides using INSERT commands to insert rows, you could keep
your raw data in a text file, and load them into the table via
the LOAD DATA command.
For example, create the following text file called
"produk_in.csv", where the values are separated by ','. The file
extension of ".csv" stands for Comma-Separated Values text
file.
\N,PENC,Pensil 3B,500,3000
\N,PENC,Pensil 4B,300,3500
\N,PENC,Pensil 5B,800,3750
\N,PENC,Pensil 6B,400,4000
mysql> LOAD DATA LOCAL INFILE 'd:/produk_in.csv'
INTO TABLE produk COLUMNS TERMINATED BY ','
LINES TERMINATED BY '\r\n';
Notes:
 You need to provide the path (absolute or relative) and the
filename. Use Unix-style forward-slash '/' as the directory
separator, instead of Windows-style back-slash '\'.
 The default line delimiter (or end-of-line) is '\n' (Unix-style).
If the text file is prepared in Windows, you need to include
LINES TERMINATED BY '\r\n'. For Mac, use LINES
TERMINATED BY '\r'.
 The default column delimiter is "tab" (in a so-called TSV file
- Tab-Separated Values). If you use another delimiter, e.g.
',', include COLUMNS TERMINATED BY ','.
 You must use \N (back-slash + uppercase 'N') for NULL.
Select …into outfile …
Lihat hasil file yang dibuat pada d:/…
More than one tables
One to many relationship
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
Masing-masing produk memiliki satu suplier, dan
setiap suplier menyuplai minimal nol atau lebih
produk.
Buat tabel suplier dengan atribut id_supl(int),
nama_supl (varchar(3)), dan telp (char(8))
Id_supl (int)
Nama_supl(varchar)
Phone (char(8))
501
Perusahaan ABC
88882222
502
Perusahaan XYZ
77773333
503
Perusahaan KLM
77772222
Tabel
Id_produk
Kode_produk Nama_produk
Jumlah
Harga
Id_supl
1001
PEN
Pulpen merah
500
3500
501
1002
PEN
Pulpen Hitam
1000
3500
501
1003
PEN
Pulpen biru
1000
3500
501
1004
PENC
Pensil 6B
400
4000
502
1005
PENC
Pensil 5B
800
3750
502
1006
PENC
Pensil 4B
300
3500
503
1007
PENC
Pensil 3B
500
3000
503

Buat tabel suplier

Masukkan data suplier

Buat kolom id_suplier pada tabel produk
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Tambahkan id_suplier sebagai foreign key pada
tabel produk
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Ganti id supl pada masing-masing produk
Select with Join
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SELECT command can be used to query and join
data from two related tables. For example, to list
the product's name (in products table) and supplier's
name (in suppliers table), we could join the two
table via the two common supplierID columns
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Join via where clause (legacy and not
recommended)

Gunakan alias ‘AS’ untuk menampilkan nama kolom
Many to Many
Setiap produk dapat disuplai oleh banyak suplier
dan setiap suplier dapat menyuplai banyak produk.
Buat sebuah tabel baru, sebagai tabel penghubung
(junction/join tabel) yang diberi nama tabel
suplier_produk.
Tabel suplier_produk
Id_produk (foreign key)
Id_supl (foreign key)
1001
501
1002
501
1003
501
1004
502
1005
503
1006
503
1007
503
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Masukkan nilai untuk suplier_produk
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Hapus kolom id_supl pada tabel produk, karena ini
hanya berlaku pada one to many relationship.
Sebelum menghapus kolom id_supl, kita hilangkan
dulu foreign key yang ada pada column tersebut.
Karena key merupakan constraint yang diberikan
oleh sistem, maka kita masuk ke sistem
databasenya.
One to one relationship
Backup
The syntax for the mysqldump program is as follows:
-- Dump selected databases with --databases option >
mysqldump -u username -p --databases database1Name
[database2Name ...] > backupFile.sql
-- Dump all databases in the server with --all-databases option,
except mysql.user table (for security) > mysqldump -u root -p
--all-databases --ignore-table=mysql.user > backupServer.sql
-- Dump all the tables of a particular database > mysqldump -u
username -p databaseName > backupFile.sql
-- Dump selected tables of a particular database > mysqldump u username -p databaseName table1Name [table2Name ...] >
backupFile.sql

Backup
 Keluar
dulu ke bin
Lihat hasilny pada d:/projek