Changes between Initial Version and Version 1 of Version2

Timestamp:

06/14/24 18:18:30 (19 months ago)

Author:

212012

Comment:

--

Version2

@@ +1 @@
+= Верзија 2
+
+== Определување функциски зависности и да нема нешто со исто име на атрибут
+
+*s_id = statement_id
+
+R={pe_id, first_name, last_name, gender, address, picture, contact, embg, date_of_birth,
+country, nationality, o_badge_no, o_password, o_date_of_employment, p_id, p_address, 
+s_id, city, p_date_of_employment, badge_no, rank, p_password, statement_id, 
+statement_date, description, incident_timestamp, incident_place, e_id, e_name, e_type, 
+is_found, e_picture, c_id, c_name, opening_date, c_status, date_of_closing, sc_description,
+final_document, t_id, t_name
+}
+
+pe_id -> first_name, last_name, gender, address, picture, contact, embg, date_of_birth,
+                                country, nationality \\
+o_badge_no -> pe_id, o_password, o_date_of_employment \\
+p_id -> p_address, o_badge_no, s_id \\
+s_id -> city \\
+badge_no -> pe_id, p_date_of_employment, rank, p_password \\
+statement_id -> statement_date, description, incident_timestamp, incident_place,
+                                                                badge_no \\
+e_id -> e_name, e_type, is_found, e_picture \\
+c_id -> c_name, opening_date, c_status, statement_id, e_id, t_id, p_id, date_of_closing \\
+date_of_closing ->  sc_description, final_document \\
+t_id -> t_name \\
+
+Лево \\
+c_id
+
+Лево и десно \\
+pe_id, t_id, o_badge_no, p_id, s_id, badge_no, statement_id, e_id, date_of_closing, t_id
+
+Десно \\
+first_name, last_name, gender, address, picture, contact, embg, date_of_birth, country, nationality, o_password, o_date_of_employment, p_address, city, p_date_of_employment, rank, p_password,statement_date, description, incident_timestamp, incident_place, e_name, e_type, 
+is_found, e_picture,c_name, opening_date, c_status, sc_description,
+final_document, t_name
+
+
+c_id+={c_id, c_name, opening_date, c_status, statement_id, e_id, t_id, p_id, date_of_closing, statement_date, description, incident_timestamp, incident_place,
+                        badge_no, e_name, e_type, is_found, e_picture, t_name, p_address, o_badge_no, s_id, sc_description, final_document, city, pe_id, o_password, o_date_of_employment, 
+                        p_date_of_employment, rank, p_password, first_name, last_name, gender, address, picture, contact, embg, date_of_birth, country, nationality }
+Следува дека е единствен кандидат клуч и го прогласуваме за примарен клуч. 
+
+
+Во ваква дефинирана релација нема повеќекратни зависности, па со тоа следува дека задоволува **1НФ**.
+
+Клучот на релацијата е составен само од еден атрибут c_id, што значи дека парцијална зависност не постои, и со тоа заклучуваме дека е задоволена **2НФ**.
+
+Не е во 3НФ бидејќи има транзитивни зависности, пример s_id -> city
+
+Декомпозиција:
+
+**R1{s_id, city} е во BCNF**
+
+R2{c_id, c_name, opening_date, c_status, statement_id, e_id, t_id, p_id, date_of_closing, statement_date, description, incident_timestamp, incident_place,
+                        badge_no, e_name, e_type, is_found, e_picture, t_name, p_address, o_badge_no, s_id, sc_description, final_document, pe_id, o_password, o_date_of_employment, 
+                        p_date_of_employment, rank, p_password, first_name, last_name, gender, address, picture, contact, embg, date_of_birth, country, nationality} 
+
+R2 не е во 3НФ поради e_id -> e_name, e_type, is_found, e_picture
+
+**R21{e_id, e_name, e_type, is_found, e_picture} е во BCNF**
+R22{c_id, c_name, opening_date, c_status, statement_id, e_id, t_id, p_id, date_of_closing, statement_date, description, incident_timestamp, incident_place,
+                        badge_no, t_name, p_address, o_badge_no, s_id, sc_description, final_document, pe_id, o_password, o_date_of_employment, 
+                        p_date_of_employment, rank, p_password, first_name, last_name, gender, address, picture, contact, embg, date_of_birth, country, nationality}
+R22 не е во 3НФ поради t_id -> t_name
+
+**R221{t_id, t_name} е во BCNF**
+R222{c_id, c_name, opening_date, c_status, statement_id, e_id, t_id, p_id, date_of_closing, statement_date, description, incident_timestamp, incident_place,
+                        badge_no, p_address, o_badge_no, s_id, sc_description, final_document, pe_id, o_password, o_date_of_employment, 
+                        p_date_of_employment, rank, p_password, first_name, last_name, gender, address, picture, contact, embg, date_of_birth, country, nationality}
+R222 не е во BCNF поради pe_id -> first_name, last_name, gender, address, picture, contact, embg, date_of_birth,country, nationality}
+
+**R2221{pe_id, first_name, last_name, gender, address, picture, contact, embg, date_of_birth,country, nationality}е во BCNF**
+R2222{c_id, c_name, opening_date, c_status, statement_id, e_id, t_id, p_id, date_of_closing, statement_date, description, incident_timestamp, incident_place,
+                        badge_no, p_address, o_badge_no, s_id, sc_description, final_document, pe_id, o_password, o_date_of_employment, p_date_of_employment, rank, p_password}
+
+R2222 не е во BCNF поради date_of_closing ->  sc_description, final_document
+**R22221{date_of_closing, sc_description, final_document}е во BCNF**
+R22222{c_id, c_name, opening_date, c_status, statement_id, e_id, t_id, p_id, date_of_closing, statement_date, description, incident_timestamp, incident_place,
+                        badge_no, p_address, o_badge_no, s_id, pe_id, o_password, o_date_of_employment, p_date_of_employment, rank, p_password}
+
+R22222 не е во 3НФ поради o_badge_no -> pe_id, o_password, o_date_of_employment 
+
+**R222221{o_badge_no, pe_id, o_password, o_date_of_employment}е во BCNF**
+
+R222222{c_id, c_name, opening_date, c_status, statement_id, e_id, t_id, p_id, date_of_closing, statement_date, description, incident_timestamp, incident_place,
+                        badge_no, p_address, o_badge_no, s_id, p_date_of_employment, rank, p_password}
+
+R222222 не е во 3НФ поради badge_no -> pe_id, p_date_of_employment, rank, p_password
+**R2222221{badge_no, pe_id, p_date_of_employment, rank, p_password} е во BCNF**
+
+R2222222{c_id, c_name, opening_date, c_status, statement_id, e_id, t_id, p_id, date_of_closing, statement_date, description, incident_timestamp, incident_place,
+                        badge_no, p_address, o_badge_no, s_id}
+
+R2222222 не е во BCNF поради statement_id -> statement_date, description, incident_timestamp, incident_place, badge_no
+**R22222221{statement_id, statement_date, description, incident_timestamp, incident_place, badge_no} е во BCNF**
+
+R22222222{c_id, c_name, opening_date, c_status, statement_id, t_id, p_id, date_of_closing, p_address, o_badge_no, s_id}
+
+R22222222 не е во BCNF поради p_id -> p_address, o_badge_no, s_id
+**R222222221{p_id, p_address, o_badge_no, s_id} е во BCNF**
+
+**R222222222{c_id, c_name, opening_date, c_status, statement_id, t_id, date_of_closing} тука завршуваме бидејќи е во BCNF.**
+
+
+== Релации
+**R1=Statement{s_id, city}** 
+
+**R21=Evidence{e_id, e_name, e_type, is_found, e_picture} е во BCNF**
+
+**R221=Type_of_crime{t_id, t_name} е во BCNF**
+
+**R2221=People{pe_id, first_name, last_name, gender, address, picture, contact, embg, date_of_birth,country, nationality}е во BCNF**
+
+**R22221=Solved_case{date_of_closing, sc_description, final_document}е во BCNF**
+
+**R222221=Officer{o_badge_no, pe_id, o_password, o_date_of_employment}е во BCNF**
+
+**R2222221=Policeman{badge_no, pe_id, p_date_of_employment, rank, p_password} е во BCNF**
+
+**R22222221=Statement{statement_id, statement_date, description, incident_timestamp, incident_place, badge_no} е во BCNF**
+
+**R222222221=Police_Station{p_id, p_address, o_badge_no, s_id} е во BCNF**
+
+**R222222222=Crime_case{c_id, c_name, opening_date, c_status, statement_id, t_id, date_of_closing} тука завршуваме бидејќи е во BCNF.**