Php meetup-nop2015

PHP Malang UG Meet Up, Nopember 2015

by Daud Mukadar@dmukadar

Tips & Trik MySQL

$ whoami

• SLUG-er

• KLAS-er

• MPUG-er

• Accidental linux user• Once an employee

• Freelance consultant

Daud Mukadar• Been using PHP when GLOBAL VARIABLE

was the thing• Love to solve problems• Like to write queries• Like to learn new things• Currently bootstraping: Tunas Mandiri IT

Solution

• Other Trick– Understanding join

– Partitioning– Tree structure

• Prepare Data

• Simple tips– forgot password– Que on FK– Serial as PK

– On Select– HEAP!

On Menu Tonight

• Mockaroo.com

• GenerateData.com

• DummyData.me

• DatabaseTestData.com

Prepare Data

• Stop MySQL$ sudo service mysqld stop #or sudo /etc/init.d/mysqld stop

• Re-run it without ACL functionality$ sudo mysqld_safe skipgranttables

• Hack a new password$ mysql u root

mysql> use mysql;

mysql> update user set password = PASSWORD('obladi') where user = 'root'

• Flush itmysql> flush privileges;

• Restart$ sudo kill `pidof mysqld_safe`

$ sudo service mysql start

ST: What's the password dude?

• Should you use it?• joining int with int

959 rows in set (0.10 sec)

• Joining int with tiny int119 rows in set (0.03 sec)

• Joining int with unsigned int959 rows in set (0.05 sec)

• Joining int with varchar959 rows in set (0.06 sec)

• Joining varchar with varcharEmpty set (1.11 sec)

ST: on Foreign Key

• Using serialmysql> CREATE TABLE tbl_users (

id SERIAL,

username VARCHAR(40) UNIQUE,

passwd VARCHAR(32) NOT NULL,

last_login TIMESTAMP NOT NULL,

last_ip_address INT(11) UNSIGNED,

created TIMESTAMP,

created_by INT(11),

updated TIMESTAMP,

updated_by INT(11)

) engine=InnoDB;

• Resultmysql> desc tbl_users;

• +++++++

• | Field | Type | Null | Key | Default | Extra |

• +++++++

• | id | bigint(20) unsigned | NO | PRI | NULL | auto_increment |

• | username | varchar(40) | YES | UNI | NULL | |

• | passwd | varchar(32) | NO | | NULL | |

• | last_login | timestamp | NO | | CURRENT_TIMESTAMP | on update CURRENT_TIMESTAMP |

• | last_ip_address | int(11) unsigned | YES | | NULL | |

• | created | timestamp | NO | | 00000000 00:00:00 | |

• | created_by | int(11) | YES | | NULL | |

• | updated | timestamp | NO | | 00000000 00:00:00 | |

• | updated_by | int(11) | YES | | NULL | |

• +++++++

• 9 rows in set (0.03 sec)

•

ST: Primary Key

• Asterisk or Notmysql> select * from tbl_nilai where id_mhs = 958;

++++++++

| id | id_mhs | mata_kuliah | semester | nilai | updated | guid |

++++++++

| 464 | 958 | Ilmu ekonomi | 3 | 94.78 | 20151001 | 7f5aeb02ca5d41d4a51351fe11c5bea6 |

| 529 | 958 | Fraud Examination | 8 | 57.75 | 20151026 | 4fc65837bd75424b9f68b04903960f1e |

| 1113 | 958 | Matematika Ekonomi | 3 | 70.39 | 20151004 | 00be5fdcc28b4c0a9bf0c3d39b2984f9 |

| 1672 | 958 | Ekonomi 2 | 4 | 66.49 | 20151003 | 5bb0f205d7464e60b3c30cb58075d656 |

| 2169 | 958 | Manajemen Sumber Daya Manusia | 1 | 34.91 | 20151008 | c0d11e1c62044a469ef6baecddda2ab1 |

| 2172 | 958 | Manajemen Distribusi Ritel | 6 | 45.33 | 20151018 | e7c1a632d9e04655bb4a329a348d75c5 |

| 2193 | 958 | Studi Kelayakan Bisnis | 13 | 59.61 | 20151030 | 116ff35d6cd048cbb30732731b3c67a6 |

| 2270 | 958 | Studi Kelayakan Bisnis | 13 | 62.62 | 20151003 | edacb7d025db4dfd81244bd8fd5ffb5c |

| 2668 | 958 | Evaluasi Kinerja | 12 | 82.41 | 20151006 | a465c348966e42deb14a36e635301e2a |

| 2715 | 958 | Perilaku Organisasi | 15 | 67.66 | 20151019 | f05681070486408ebef37cacf9663b0c |

++++++++


mysql> select id, id_mhs, mata_kuliah, semester, nilai, updated, guid from tbl_nilai where id_mhs = 74;

++++++++


++++++++

| 879 | 74 | Manajemen Kompensasi | 10 | 97.98 | 20151013 | b8f9903f989d464bbca17d8f689147b2 |

| 890 | 74 | Manajemen Produk & Harga | 9 | 49.50 | 20151018 | 9b036b96888b4e62a158d33ac2f3f4ba |

| 1247 | 74 | Audit 1 | 9 | 81.01 | 20151005 | c1e89f6c28e24b8a8fc2dbeca5e1ba0d |

| 1695 | 74 | Manajemen Produk dan Harga | 8 | 39.17 | 20151006 | 5e14640f1ac64addb9caad1f17293dab |

| 1720 | 74 | Akuntansi Manajemen | 16 | 93.00 | 20151023 | 198f3e12ae6448fa967a8ffcc9b01338 |

| 1884 | 74 | Bahasa Inggris | 3 | 6.96 | 20151024 | 486e42a585f14a0b96b16997ce705293 |

| 2475 | 74 | Pengantar Manajemen | 7 | 28.31 | 20151029 | a007b6f1e9124d94963c05094adc4c5a |

| 2611 | 74 | Audit 1 | 3 | 55.46 | 20151015 | a3613465596745d7a6a3748915a391f6 |

| 2921 | 74 | Ekonomi 2 | 8 | 10.14 | 20151009 | d4826e5801744922968216ea46065923 |

| 2957 | 74 | Bahasa Inggris | 9 | 26.33 | 20151026 | 84bc611d10dc41aa829767ff29e7ae0e |

++++++++


•

•

ST: On Select

• Limiting to 1mysql> select * from tbl_nilai where id_mhs = 435;

++++++++


++++++++

| 30 | 435 | Ekonomi 2 | 11 | 58.40 | 20151012 | 4ef8a9db5dde431e99cd493bacaeb342 |

++++++++

1 row in set (0.02 sec)

mysql> select * from tbl_nilai where id_mhs = 555 limit 1;

++++++++


++++++++

| 674 | 555 | Ekonomi Makro | 11 | 61.29 | 20151022 | df79768cb385475fb25c885a489c62fc |

++++++++

1 row in set (0.01 sec)

ST: On Select

• MySQL DB Engine• Storing temporary non essential value with heapmysql> CREATE TABLE login_tracker(

user_id INT(11) NOT NULL,

login_time TIMESTAMP,

last_activity TIMESTAMP

) engine=memory;

mysql> INSERT INTO login_tracker(5, CURRENT_TIMESTAMP, CURRENT_TIMESTAMP);

• Heap Limitation:– Index usage: not optimal, limited conditional operator, can not be

ordered– No support auto increment– Not for text or blob

ST: HEAP TO THE RESCUE

UNDERSTANDING JOIN

• AsumsiTABLE_A TABLE_B

id name id name

1 Pirate 1 Rutabaga

2 Monkey 2 Pirate

3 Ninja 3 Darth Vader

4 Spaghetti 4 Ninja

• Inner Join on A.name = B.nameid name id name

1 Pirate 2 Pirate

3 Ninja 4 Ninja

UNDERSTANDING JOIN


id name id name

1 Pirate 1 Rutabaga

2 Monkey 2 Pirate


4 Spaghetti 4 Ninja

• Full Outer Join on A.name = B.nameid name id name

1 Pirate 2 Pirate

2 Monkey null null

3 Ninja 4 Ninja

4 Spaghetti null null

null null 1 Rutabaga

null null 3 Darth Vader

–

UNDERSTANDING JOIN


id name id name

1 Pirate 1 Rutabaga

2 Monkey 2 Pirate


4 Spaghetti 4 Ninja

• Left Outer Join on A.name=B.nameid name id name

1 Pirate 2 Pirate

2 Monkey null null

3 Ninja 4 Ninja


–

UNDERSTANDING JOIN


id name id name

1 Pirate 1 Rutabaga

2 Monkey 2 Pirate


4 Spaghetti 4 Ninja

• How ?id name id name

2 Monkey null null


–

UNDERSTANDING JOIN


id name id name

1 Pirate 1 Rutabaga

2 Monkey 2 Pirate


4 Spaghetti 4 Ninja

• How ?id name id name

2 Monkey null null


–

Partitioning

• Check Pluginmysql> show plugins;

++++++

| Name | Status | Type | Library | License |

++++++

| binlog | ACTIVE | STORAGE ENGINE | NULL | GPL |

| partition | ACTIVE | STORAGE ENGINE | NULL | GPL |

| ARCHIVE | ACTIVE | STORAGE ENGINE | NULL | GPL |

| BLACKHOLE | ACTIVE | STORAGE ENGINE | NULL | GPL |

| CSV | ACTIVE | STORAGE ENGINE | NULL | GPL |

| FEDERATED | DISABLED | STORAGE ENGINE | NULL | GPL |

| MEMORY | ACTIVE | STORAGE ENGINE | NULL | GPL |

| InnoDB | ACTIVE | STORAGE ENGINE | NULL | GPL |

| MyISAM | ACTIVE | STORAGE ENGINE | NULL | GPL |

| MRG_MYISAM | ACTIVE | STORAGE ENGINE | NULL | GPL |

++++++


• Buat PartisiCREATE TABLE tbl_patient (

ssn VARCHAR(35),

first_name VARCHAR(25) NOT NULL,

last_name VARCHAR(25) NOT NULL,

title VARCHAR(16) NOT NULL,

dob DATE,

registered DATE NOT NULL

)

PARTITION BY RANGE( YEAR(registered) ) (

PARTITION p0 VALUES LESS THAN (1985),




PARTITION p4 VALUES LESS THAN MAXVALUE

);

•

Tree Structure

• Adjency Listmysql> CREATE TABLE category(

category_id INT AUTO_INCREMENT PRIMARY KEY,

name VARCHAR(20) NOT NULL,

parent INT DEFAULT NULL

);

Mysql> SELECT * FROM category ORDER BY category_id;

++++

| category_id | name | parent |

++++

| 1 | ELECTRONICS | NULL |

| 2 | TELEVISIONS | 1 |

| 3 | TUBE | 2 |

| 4 | LCD | 2 |

| 5 | PLASMA | 2 |

| 6 | PORTABLE ELECTRONICS | 1 |

| 7 | MP3 PLAYERS | 6 |

| 8 | FLASH | 7 |

| 9 | CD PLAYERS | 6 |

| 10 | 2 WAY RADIOS | 6 |

++++


Tree Structure

• Nested Listmysql> CREATE TABLE nested_category (



lft INT NOT NULL,

rgt INT NOT NULL

);


+++++

| category_id | name | lft | rgt |

+++++

| 1 | ELECTRONICS | 1 | 20 |

| 2 | TELEVISIONS | 2 | 9 |

| 3 | TUBE | 3 | 4 |

| 4 | LCD | 5 | 6 |

| 5 | PLASMA | 7 | 8 |

| 6 | PORTABLE ELECTRONICS | 10 | 19 |

| 7 | MP3 PLAYERS | 11 | 14 |

| 8 | FLASH | 12 | 13 |

| 9 | CD PLAYERS | 15 | 16 |

| 10 | 2 WAY RADIOS | 17 | 18 |

+++++

Tree Structure




lft INT NOT NULL,

rgt INT NOT NULL

);


+++++


+++++

| 1 | ELECTRONICS | 1 | 20 |


| 3 | TUBE | 3 | 4 |

| 4 | LCD | 5 | 6 |

| 5 | PLASMA | 7 | 8 |


| 7 | MP3 PLAYERS | 11 | 14 |

| 8 | FLASH | 12 | 13 |

| 9 | CD PLAYERS | 15 | 16 |

| 10 | 2 WAY RADIOS | 17 | 18 |

+++++

Tree Structure




lft INT NOT NULL,

rgt INT NOT NULL

);


+++++


+++++

| 1 | ELECTRONICS | 1 | 20 |


| 3 | TUBE | 3 | 4 |

| 4 | LCD | 5 | 6 |

| 5 | PLASMA | 7 | 8 |


| 7 | MP3 PLAYERS | 11 | 14 |

| 8 | FLASH | 12 | 13 |

| 9 | CD PLAYERS | 15 | 16 |

| 10 | 2 WAY RADIOS | 17 | 18 |

+++++

Date post:	22-Jan-2018
Category:	Technology
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