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create table users (
user_id integer not null primary key,
first_names varchar(100) not null,
last_name varchar(100) not null,
priv_name integer default 0,
email varchar(100) not null unique,
priv_email integer default 5,
email_bouncing_p char(1) default 'f'
check(email_bouncing_p in ('t','f')),
password varchar(30) not null,
url varchar(200),
on_vacation_until date,
last_visit date,
second_to_last_visit date,
registration_date date
);
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last_visit = sysdate, second_to_last_visit = last_visitWe set a persistent second_to_last_visit cookie with the
last_visittime, either from the last_visit cookie or, if that wasn't present, with the value we just put into thesecond_to_last_visitcolumn of the database.
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create table users_preferences (
user_id integer not null references users,
prefer_text_only_p char(1) default 'f' check (prefer_text_only_p in ('t','f'))
);
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create table static_pages (
page_id integer not null primary key,
url_stub varchar(400) not null unique,
original_author integer references users(user_id),
-- generally PAGE_TITLE will be whatever was inside HTML TITLE tag
page_title varchar(4000),
-- the dreaded CLOB data type; we're forced to use
-- in Oracle when we want strings longer than 4000 characters
page_body clob,
draft_p char(1) default 'f' check (draft_p in ('t','f')),
-- force people to register before viewing?
members_only_p char(1) default 'f' check (members_only_p in ('t','f')),
-- if we want to charge (or pay) readers for viewing this
price number,
-- for deviations from site-default copyright policy
copyright_info varchar(4000),
-- whether or not this page accepts reader contributions
accept_comments_p char(1) default 't' check (accept_comments_p in ('t','f')),
accept_links_p char(1) default 't' check (accept_links_p in ('t','f'))
);
ÔÚÕâÕqíÀìÎÒÃòÉÓû¸öÕûÊýÐuijÃæºÅÂèpage_id£©×÷ªË÷Òý¡£µ±;²¿ÉÒ2ÉÓà url_stub(²¼´Î<þÃû)×öË÷Òý£¬»ÊÇÕâÑù×ö»á¹µÃÔÚUnixÎ<þõsÏÂÖØÐÂÕûÀíÎ<þ±äµÃ®·Ö'Äa££¨ÔÚÍø~·þÎñÆ÷É㬪ÖØÐÂÕûÀíÎ<þµÄ±ºòæ¸úÜÉc»¶øÇÒÕâÑù»áÁîÈüÒÍø~½ø4µÄt½ö¼§'¡£)
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stuff the full content into the page_body anyway. Why?
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create table static_page_authors ( page_id integer not null references static_pages, user_id integer not null references users );
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create table categories (
category_id integer not null primary key,
category varchar(50)
);
We then reference this table from a table that maps static pages to categories:
create table static_categories ( page_id integer not null references static_pages, category_id integer not null references categories, unique(page_id, category_id) );
SQL¸ßÊ»áâÒ}unique׶µÄ¨»ÐÔÏÞÖ£¬¿ÉÒ1ÜÃâl»³±»¶à´·ÖÀc
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create table comments ( page_id integer not null references static_pages, user_id integer not null references users, comment_type varchar(30), message clob, --comment_typeµ²»Êá®Æ<¶¡¯µ;°£¬Éèªnull rating integer check (rating >= 0 and rating <= 10), originating_ip varchar(50), posting_time date );
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create table links (
page_id integer not null references static_pages,
user_id integer not null references users,
url varchar(300) not null,
link_title varchar(100) not null,
link_description varchar(4000),
-- contact if link is dead?
contact_p char(1) default 't' check (contact_p in ('t','f')),
status char(10) default 'live' check (status in ('live','coma','dead','removed')),
originating_ip varchar(50),
posting_time date,
unique(page_id,url)
);
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create table link_kill_patterns ( page_id integer references static_pages, -- who added the kill pattern user_id integer not null references users, date_added date, glob_pattern varchar(500) not null );
ÔºÚÃûµ¥µÄglob_pattern׶ÎÀï¼ÓÈ뻸öt½ã¬±ÈÈç*microsoft.com*£¬ ÕâÑùt½ÓÊý¾âÖ7²ÊÇÓ뮥Åäµ3¬t½ã¬°ü(ÄÇ)¹ÓôõØ·µÄËùÓгÃæt½ã¬¶¼»{~³ý¡£²¢Ç£¬Ò:ó·²ÊÇÆó|¼ÓÈë´ó¬t½õÄÇëÇ󶼻{õs×6¯µ>>ø¡£
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create table advs ( adv_key varchar(200) primary key, adv_filename varchar(200), target_url varchar(500) ); create table adv_log ( adv_key varchar(200) not null references advs, entry_date date, display_count integer default 0, click_count integer default 0 );
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create table adv_user_map ( adv_key varchar(200) not null references advs, user_id integer not null references users, event_time date not null, -- will generally be 'd' (displayed) 'c' (clicked through) event_type char(1) );
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create table adv_categories ( adv_key varchar(200) not null references advs, category_id integer not null references categories, unique(adv_key, category_id) );
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