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Identification of data structures

Użytkownikuser

#ID_user PK
int
*Imiename
varchar
*Nazwiskosurname
varchar
*Adres_emailemail_adressvarchar
*User_type
varcharint

                                                                                 

Email

#ID_email PK
int
0 message
varchar
*ID_NadawcyID_sender FK
int
*ID_AdresataID_receiver FK
int
SkrzynkaInbox

#ID_skrzynki#ID_inbox PK
int
*ID_user FK
int
0 ID_email FK
int
Drafts

#ID_draft PK
int
*ID_Inbox FK
int
content_draft
varchar