This the code for building a database and query the database and the database to understand the logical structure of experimental design will use the ER diagram into relational schema: manager (number, account number, password, permission) rooms (number, type, price, status, check account number) Customer (ID, name, sex, age, ID number, address, Check, expected number of days, room number, check-out, deposit, accommodation, registration person) room management administrator (administrator ID, room number) management member of client management (administrator number, customer number)

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