You can use expressions that have arithmetic operations (such as + for additions and - for subtractions).
You can use a data query both to determine data that already exists in a table and calculate values on the basis of this data.
SELECT hno, price*7 weekly_price, type
FROM hotel.room
WHERE type = 'single' AND hno <50
Displaying the weekly price for a single room; the display has been restricted to those hotels with a hotel number below 50
Result
HNO |
WEEKLY_PRICE |
TYPE |
10 |
945 |
Single |
20 |
490 |
Single |
30 |
315 |
Single |
40 |
595 |
Single |
In search conditions, you can also use expressions that have arithmetic operations.
SELECT hno, type, price
FROM hotel.room
WHERE price*7 < 500 AND type =
'single'
Displaying the hotels whose weekly price for a single room is below 500.00 euro
Result
HNO |
TYPE |
PRICE |
20 |
Single |
70 |
30 |
Single |
45 |
100 |
Single |
60 |
110 |
Single |
70 |
SELECT hno, type, price
FROM hotel.room
WHERE (price*1.05)*7 < 500 AND type =
'single'
Displaying the hotels whose weekly price for a single room is below 500.00 euro, even after a price increase of 5 percent
Result
HNO |
TYPE |
PRICE |
30 |
Single |
45 |
100 |
Single |
60 |
See also: