5. http и приятели
TRANSCRIPT
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HTTP и приятели
HTTP/1.1 200 OKСтефан: КъневНиколай: БачийскиКога: 22.10.2008
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защо изглеждам сънен
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http://fmi.rails-bg.net/topics
днес ще разберат как от това се получава
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това
(с готин transition)
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http://първият компонент
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Request
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Response
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http://fmi.rails-bg.net/topics
TCP връзка към fmi.rails-bg.net на порт 80
fmi.rails-bg.netПенчо
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nb@creep:~$ wget -S http://fmi.rails-bg/net/topics--2008-10-22 06:56:15-- http://fmi.rails-bg/net/topicsResolving fmi.rails-bg... ^Cnb@creep:~$ wget -S http://fmi.rails-bg.net/topics--2008-10-22 06:56:27-- http://fmi.rails-bg.net/topicsResolving fmi.rails-bg.net... 78.83.99.48Connecting to fmi.rails-bg.net|78.83.99.48|:80... connected.HTTP request sent, awaiting response... HTTP/1.1 200 OK Date: Wed, 22 Oct 2008 03:56:28 GMT Server: Mongrel 1.1.5 Status: 200 OK ETag: "d442009ec5c720c14ceb0d2be6e4ccf8" X-Runtime: 0.04557 Content-Type: text/html; charset=utf-8 Content-Length: 5048 Cache-Control: private, max-age=0, must-revalidate Set-Cookie: _trane_session=ee47058b784246a19b9e0efc6762fc9d; path=/ Via: 1.0 fmi.rails-bg.net Keep-Alive: timeout=15, max=100 Connection: Keep-Alive
nb@creep:~$ wget -S http://fmi.rails-bg/net/topics--2008-10-22 06:56:15-- http://fmi.rails-bg/net/topicsResolving fmi.rails-bg... ^Cnb@creep:~$ wget -S http://fmi.rails-bg.net/topics--2008-10-22 06:56:27-- http://fmi.rails-bg.net/topicsResolving fmi.rails-bg.net... 78.83.99.48Connecting to fmi.rails-bg.net|78.83.99.48|:80... connected.HTTP request sent, awaiting response... HTTP/1.1 200 OK Date: Wed, 22 Oct 2008 03:56:28 GMT Server: Mongrel 1.1.5 Status: 200 OK ETag: "d442009ec5c720c14ceb0d2be6e4ccf8" X-Runtime: 0.04557 Content-Type: text/html; charset=utf-8 Content-Length: 5048 Cache-Control: private, max-age=0, must-revalidate Set-Cookie: _trane_session=ee47058b784246a19b9e0efc6762fc9d; path=/ Via: 1.0 fmi.rails-bg.net Keep-Alive: timeout=15, max=100 Connection: Keep-Alive
nb@creep:~$ wget -S http://fmi.rails-bg/net/topics--2008-10-22 06:56:15-- http://fmi.rails-bg/net/topicsResolving fmi.rails-bg... ^Cnb@creep:~$ wget -S http://fmi.rails-bg.net/topics--2008-10-22 06:56:27-- http://fmi.rails-bg.net/topicsResolving fmi.rails-bg.net... 78.83.99.48Connecting to fmi.rails-bg.net|78.83.99.48|:80... connected.HTTP request sent, awaiting response... HTTP/1.1 200 OK Date: Wed, 22 Oct 2008 03:56:28 GMT Server: Mongrel 1.1.5 Status: 200 OK ETag: "d442009ec5c720c14ceb0d2be6e4ccf8" X-Runtime: 0.04557 Content-Type: text/html; charset=utf-8 Content-Length: 5048 Cache-Control: private, max-age=0, must-revalidate Set-Cookie: _trane_session=ee47058b784246a19b9e0efc6762fc9d; path=/ Via: 1.0 fmi.rails-bg.net Keep-Alive: timeout=15, max=100 Connection: Keep-Alive
nb@creep:~$ wget -S http://fmi.rails-bg/net/topics--2008-10-22 06:56:15-- http://fmi.rails-bg/net/topicsResolving fmi.rails-bg... ^Cnb@creep:~$ wget -S http://fmi.rails-bg.net/topics--2008-10-22 06:56:27-- http://fmi.rails-bg.net/topicsResolving fmi.rails-bg.net... 78.83.99.48Connecting to fmi.rails-bg.net|78.83.99.48|:80... connected.HTTP request sent, awaiting response... HTTP/1.1 200 OK Date: Wed, 22 Oct 2008 03:56:28 GMT Server: Mongrel 1.1.5 Status: 200 OK ETag: "d442009ec5c720c14ceb0d2be6e4ccf8" X-Runtime: 0.04557 Content-Type: text/html; charset=utf-8 Content-Length: 5048 Cache-Control: private, max-age=0, must-revalidate Set-Cookie: _trane_session=ee47058b784246a19b9e0efc6762fc9d; path=/ Via: 1.0 fmi.rails-bg.net Keep-Alive: timeout=15, max=100 Connection: Keep-Alive
текстов
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не е binary
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Request
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GET /topics?type=stupid&subtype=rockingchair
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GET не е хубаво да променя състоянието
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POST
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PUT
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DELETE
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глава / header
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Тяло
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И да не се сърдят дамите :-)
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глава / header
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header-и на заявка
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GET /topics HTTP/1.1
header-и на заявка
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GET /topics HTTP/1.1Host: fmi.rails-bg.net
header-и на заявка
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GET /topics HTTP/1.1Host: fmi.rails-bg.netUser-agent: Mozilla/5.0...
header-и на заявка
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GET /topics HTTP/1.1Host: fmi.rails-bg.netUser-agent: Mozilla/5.0...Accept: text/html, application/xhtml+xml
header-и на заявка
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GET /topics HTTP/1.1Host: fmi.rails-bg.netUser-agent: Mozilla/5.0...Accept: text/html, application/xhtml+xml
header-и на заявка
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header-и на заявка
content-type за тялото
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POST /topics HTTP/1.1
header-и на заявка
content-type за тялото
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POST /topics HTTP/1.1Host: fmi.rails-bg.net
header-и на заявка
content-type за тялото
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POST /topics HTTP/1.1Host: fmi.rails-bg.netUser-agent: Mozilla/5.0...
header-и на заявка
content-type за тялото
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POST /topics HTTP/1.1Host: fmi.rails-bg.netUser-agent: Mozilla/5.0...Accept: text/html, application/xhtml+xml
header-и на заявка
content-type за тялото
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POST /topics HTTP/1.1Host: fmi.rails-bg.netUser-agent: Mozilla/5.0...Accept: text/html, application/xhtml+xml
Content-Type: application/x-www-form-encoded
header-и на заявка
content-type за тялото
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HTTP/1.1 200 OKContent-Type: text/htmlDate: Wed, 22 Oct 2008 03:56:28 GMTContent-Length: 5048
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1xx Informational 2xx Successes 3xx Redirection4xx Client Error 5xx Server Error
200 OK301 Moved Permanently 404 Not Found
500 Internal Server Error
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Тяло
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Тяло
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POST /topics HTTP/1.1
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POST /topics HTTP/1.1Host: fmi.rails-bg.net
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POST /topics HTTP/1.1Host: fmi.rails-bg.netContent-Type: application/x-www-form-encoded
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POST /topics HTTP/1.1Host: fmi.rails-bg.netContent-Type: application/x-www-form-encoded
title=The Best Title&content=...
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HTTP/1.1 200 OK
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HTTP/1.1 200 OKContent-Type: text/html
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HTTP/1.1 200 OKContent-Type: text/htmlDate: Wed, 22 Oct 2008 03:56:28 GMT
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HTTP/1.1 200 OKContent-Type: text/htmlDate: Wed, 22 Oct 2008 03:56:28 GMTContent-Length: 5048
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HTTP/1.1 200 OKContent-Type: text/htmlDate: Wed, 22 Oct 2008 03:56:28 GMTContent-Length: 5048
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML...
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HTTP/1.1 200 OKContent-Type: text/htmlDate: Wed, 22 Oct 2008 03:56:28 GMTContent-Length: 5048
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML...<html lang='bg' xml:lang='bg'...
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HTTP/1.1 200 OKContent-Type: text/htmlDate: Wed, 22 Oct 2008 03:56:28 GMTContent-Length: 5048
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML...<html lang='bg' xml:lang='bg'... <head>
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HTTP/1.1 200 OKContent-Type: text/htmlDate: Wed, 22 Oct 2008 03:56:28 GMTContent-Length: 5048
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML...<html lang='bg' xml:lang='bg'... <head> <title>Програмирани с Ruby и Rails...
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Statefmi.rails-bg.net
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Statefmi.rails-bg.net
10:01
/topics
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Statefmi.rails-bg.net
10:01
/topics
10:02
/tasks
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Statefmi.rails-bg.net
10:01
/topics
10:02
/tasks
10:03
/topics/5
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Statefmi.rails-bg.net
10:01
/topics
10:02
/tasks
10:03
/topics/5
10:04
/tasks/1
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Statelessfmi.rails-bg.net
10:01
/topics
10:02
/tasks
10:03
/topics/5
10:04
/tasks/1
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Cookies
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Cookies
HTTP/1.1 200 OKContent-Type: text/htmlSet-Cookie: secret=ndrznzvr
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Cookies
HTTP/1.1 200 OKContent-Type: text/htmlSet-Cookie: secret=ndrznzvr
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Cookies
HTTP/1.1 200 OKContent-Type: text/htmlSet-Cookie: secret=ndrznzvr
GET /baba HTTP/1.1Host: fmi.rails-bg.netCookie: secret=ndrznzvr
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Cookies
HTTP/1.1 200 OKContent-Type: text/htmlSet-Cookie: secret=ndrznzvr
GET /baba HTTP/1.1Host: fmi.rails-bg.netCookie: secret=ndrznzvr
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</http>
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Content-Type: text/html
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML...<html lang='bg' xml:lang='bg'... <head> <title>Програмирани с Ruby и Rails...
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Content-Type: text/html
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML...<html lang='bg' xml:lang='bg'... <head> <title>Програмирани с Ruby и Rails...
HTML
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Content-Type: text/html
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML...<html lang='bg' xml:lang='bg'... <head> <title>Програмирани с Ruby и Rails...
HTMLX
![Page 67: 5. HTTP и приятели](https://reader034.vdocuments.pub/reader034/viewer/2022050818/55959f861a28ab05448b458a/html5/thumbnails/67.jpg)
Цел:
съдържание на страницата(не изгледа, не поведението)
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Markup = Маркиране ± език
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Markup = Маркиране ± език
<чушка цвят="жълт">
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Markup = Маркиране ± език
<чушка цвят="жълт">
</чушка>
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Markup = Маркиране ± език
<чушка цвят="жълт">
</чушка>
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Смисъл, структура
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<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
<html> <head> ? </head> <body> ? </body></html>
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<head> <title>Моето любимо коте</title> <meta name=”generator” content=”моите две ръце” /></head>
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<body> <h1>Моето коте — Кънчо</h1> <p>Здрасти, това е страницата, поветена на моето любимо коте. Тук ще намерите много информация, снимки и връзки за него.</p> <ul class="menu"> <li><a href="/bio">Биография на Кънчо</a></li> <li><a href="/photos">Снимки</a></li> </ul> <img src="/kuncho_best.jpg" alt="Кънчо -- най-красив"/></body>
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Is YOUR HTML valid?http://validator.w3.org/http://www.w3.org/TR/html401/ http://www.w3.org/TR/xhtml1/
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Сам е скучно, искам в група
Сам е скучно
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И таговете са по-добре с компания
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<div> каквито си искате тагове</div>
<span> почти каквито искате</span>
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Кой съм аз и за какво се боря? Как да ме намериш?
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Разпознаване<div id="footer"><ul class="menu">
<div class="menu reply">
атрибути за всички тагове
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Формуляри<form action="/topics" method="post">
<label for="fullname">Full name</label> <input name="fullname" id="fullname" type="text" />
<input name="tick" type="checkbox" checked="checked" />
<textarea name="freetext">Feed me!</textarea>
<select name="project"> <option value="easy">The hard one</option> <option value="hard" selected="selected">The easy one</option> </select> <input type="submit" value="Run, Lola">
</form>
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За някои е важно всичко да е красиво
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Дори отвътре да е развалено
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Красота ⊂ HTML + CSSВ този курс ще се интересуваме от вътрешната красота, но ако все пак ви интересува
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<h1>,<h2><strong><em>
Стандартен изглед на някои HTML тагове
•<li></li><a>
<p>
<div>,<p>,<form>скутийкаиновредоколотях<a>,<span>,<strong>,<img>единследдруг
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CSSCascading Style Sheets
http://www.w3.org/Style/CSS/
http://w3schools.com/css/
http://jigsaw.w3.org/css-validator/
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Как си пазим съдържанието, което трябва да структурираме в
HTML?
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Опитвали сте се сами да мислите файлови формати и интерфейс за достъп до данните си?
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Релационен модел
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Коткирелация ≈ таблица
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ID Име Порода
1 Macorana3f Сомалийска
2 Стрептокок Сиамска
3 Шрапнел Сомалийска
4 Рекса Мейн Куун
Коткирелация ≈ таблица
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ID Име Порода
1 Macorana3f Сомалийска
2 Стрептокок Сиамска
3 Шрапнел Сомалийска
4 Рекса Мейн Куун
Първичен ключ/PK
Коткирелация ≈ таблица
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ID Име Порода
1 Macorana3f Сомалийска
2 Стрептокок Сиамска
3 Шрапнел Сомалийска
4 Рекса Мейн Куун
Първичен ключ/PK
Коткирелация ≈ таблица
Запис/ред
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Нормализация≈
липса на повторения на данни
Пак далеч от теорията
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ID Име Порода
1 Macorana3f Сомалийска
2 Стрептокок Сиамска
3 Шрапнел Сомалийска
4 Рекса Мейн Куун
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Породи
Котки
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Породи
КоткиID Име ID на Порода
1 Macorana3f 22 Стрептокок 13 Шрапнел 24 Рекса 3
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Породи
Котки
ID Порода1 Сиамска2 Сомалийска3 Мейн Куун
ID Име ID на Порода
1 Macorana3f 22 Стрептокок 13 Шрапнел 24 Рекса 3
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Породи
Котки
ID Порода1 Сиамска2 Сомалийска3 Мейн Куун
ID Име ID на Порода
1 Macorana3f 22 Стрептокок 13 Шрапнел 24 Рекса 3
Котка към Порода, много към едно
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Породи
Котки
ID Порода1 Сиамска2 Сомалийска3 Мейн Куун
ID Име ID на Порода
1 Macorana3f 22 Стрептокок 13 Шрапнел 24 Рекса 3
Котка към Порода, много към едно
От всяка порода може да има много котки, една котка е от една порода
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Мелези?
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Котка към Порода, много към много
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Котка към Порода, много към много
От всяка порода може да има много котки, една котка може да е от много породи
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Котка към Порода, много към много
От всяка порода може да има много котки, една котка може да е от много породи
КоткиID Име
1 Macorana3f
2 Стрептокок
3 Шрапнел
4 Рекса
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Котка към Порода, много към много
От всяка порода може да има много котки, една котка може да е от много породи
КоткиID Име
1 Macorana3f
2 Стрептокок
3 Шрапнел
4 Рекса
Породи
ID Порода
1 Сиамска
2 Сомалийска
3 Мейн Куун
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Котка към Порода, много към много
От всяка порода може да има много котки, една котка може да е от много породи
КоткиID Име
1 Macorana3f
2 Стрептокок
3 Шрапнел
4 Рекса
Породи
ID Порода
1 Сиамска
2 Сомалийска
3 Мейн Куун
Котки към породи
IDID на котка
ID на порода
1 1 12 1 23 2 14 3 25 4 4
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SQLStructured Query Language
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SELECT * FROM kittens
SELECT * FROM kittens WHERE age < 2
SELECT id, name FROM kittens WHERE name LIKE ‘Brr%’
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UPDATE kittens SET age = age +1 WHERE name = ‘Birthday Kitten’
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INSERT INTO kittens (id, name, age) VALUES (7, ‘Pinko’, 1)
INSERT INTO kittens (name) VALUES (‘Pinko’)
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NULL
NULL
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SELECT NULL + 2 →NULL
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Задача: име и порода за всяка котка?
Заявка върху повече от една таблица?
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ID Име ID на Порода
1 Macorana3f 2
2 Стрептокок 1
3 Шрапнел 2
4 Рекса 3
Задача: име и порода за всяка котка?
Заявка върху повече от една таблица?
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ID Име ID на Порода
1 Macorana3f 2
2 Стрептокок 1
3 Шрапнел 2
4 Рекса 3
ID Порода1 Сиамска2 Сомалийска3 Мейн Куун
Задача: име и порода за всяка котка?
Заявка върху повече от една таблица?
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JOINдекартово произведение на две таблици
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JOINдекартово произведение на две таблици
ID на котка Име ID на Порода ID на порода Порода
1 Macorana3f 2 1 Сиамска2 Стрептокок 1 2 Сомалийска3 Шрапнел 2 3 Мейн Куун4 Рекса 3 1 Сиамска1 Macorana3f 2 2 Сомалийска2 Стрептокок 1 3 Мейн Куун3 Шрапнел 2 1 Сиамска4 Рекса 3 2 Сомалийска1 Macorana3f 2 3 Мейн Куун2 Стрептокок 1 1 Сиамска3 Шрапнел 2 2 Сомалийска4 Рекса 3 3 Мейн Куун
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When a bike is stolen,a fairy dies