Given the SQL query SELECT hotelname, type FROM hotel NATURAL JOIN (SELECT * FROM room WHERE price>50). Which of these relational algebra queries will produce the equivalent table? Tick all that apply. [ ] πhotelName,type (Hotel ⋈(πprice > 50(Room))) [ ] σhotelName(Hotel ⋈(πprice > 50(Room))) [ ] πhotelName,type(Hotel ⋈(σprice > 50(Room))) [ ] σhotelName,type(Hotel ⋈(σprice > 50(Room))) Given a relational algebra σHotel.hotelNo = Room.hotelNo(Hotel x Room) , which of the following SQL queries does NOT produce the same result table? Tick all that apply. [ ] SELECT * FROM Hotel CROSS JOIN Room ON Hotel.hotelNo = Room.hotelNo; [ ] SELECT * FROM Hotel JOIN Room ON Hotel.hotelNo = Room.hotelNo; [ ] SELECT * FROM Hotel, Room WHERE Hotel.hotelNo = Room.hotelNo; [ ] SELECT * FROM Hotel LEFT JOIN Room ON Hotel.hotelNo = Room.hotelNo;

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SQL Query

Structured Query Language is the full form of SQL. It is one of the standard languages to deal with the relational database. It is used to insert, update, delete, and search the records stored in a RDBMS. The relational databases are created and managed by using SQL.