Examlex
CUSTOMER
RENTALS
In the table RENTALS, Rtn provides the rental number (the primary key., Cname refers to the Cname in Customer, Pickup is the city where the car was picked up, and Return is the city where the car was returned.
RENTCOST
In RENTCOST, COST shows the base cost of renting a given MAKE for one day.
CITYADJ
If the return city of table RENTALS is the one listed in table CITYADJ, the cost of the rental is multiplied by FACTOR and by DAYS shown in table RENTLENGTH below.
RENTLENGTH
RENTLENGTH shows the number of DAYS for the rental number (RTN) of the table RENTALS (this table exists for the sake of testing SQL. Normally, the data here should be part of table RENTALS.
-The last value of Cname shown by the execution of the (ORACLE) SQL query SELECT Cname,Date_Out
FROM RENTALS
WHERE to_number(to_char(Date_Out,'YYYY') ) >1994
ORDER BY Cname
Is:
Esters
Organic compounds derived from carboxylic acids in which the hydrogen of the carboxyl group is replaced by a hydrocarbon group, often responsible for the sweet or fruity aromas and flavors of many fruits and flowers.
Aldehydes
Organic compounds characterized by a carbonyl group bonded to at least one hydrogen atom, making them highly reactive.
Carboxylic Acid Derivative
Compounds obtained by substituting the hydroxyl group in carboxylic acids with other functional groups like halides, amides, or esters.
β-Hydroxybutyronitrile
An organic compound featuring a hydroxyl group (–OH) and a nitrile group (–CN) on a four-carbon chain, positioned beta (β) to each other.
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