Zaokrąglanie i obcinanie liczb
SQL Server średnio zaawansowany
Ginger Grant
Instructor
Zaokrąglanie liczb w T-SQL
ROUND(number, length [,function])
Zaokrąglanie liczb w T-SQL
SELECT DurationSeconds,
ROUND(DurationSeconds, 0) AS RoundToZero,
ROUND(DurationSeconds, 1) AS RoundToOne
FROM Incidents
+--------------------+------------------+------------------+
|DurationSeconds |RoundToZero |RoundToOne |
+--------------------+------------------+------------------+
|121.6480 |122.0000 |121.6000 |
|170.3976 |170.0000 |170.4000 |
|336.0652 |336.0000 |336.1000 |
...
+--------------------+------------------+------------------+
Zaokrąglanie po lewej stronie przecinka
SELECT DurationSeconds,
ROUND(DurationSeconds, -1) AS RoundToTen,
ROUND(DurationSeconds, -2) AS RoundToHundred
FROM Incidents
+--------------------+------------------+------------------+
|DurationSeconds |RoundToTen |RoundToHundred |
+--------------------+------------------+------------------+
|121.6480 |120.0000 |100.0000 |
|170.3976 |170.0000 |200.0000 |
|336.0652 |340.0000 |300.0000 |
...
+--------------------+------------------+------------------+
Obcinanie liczb
Obcinanie
17,85 $\rightarrow$ 17
Zaokrąglanie
17,85 $\rightarrow$ 18
Obcinanie z ROUND()
Funkcja ROUND() może być użyta do obcinania wartości po podaniu trzeciego argumentu
ROUND(number, length [,function])
- Ustaw trzecią wartość na liczbę niezerową
Obcinanie w T-SQL
SELECT Profit,
ROUND(DurationSeconds, 0) AS RoundingtoWhole,
ROUND(DurationSeconds, 0, 1) AS Truncating
FROM Incidents
+--------------------+------------------+------------------+
|Profit |RoundingtoWhole |Truncating |
+--------------------+------------------+------------------+
|15.6100 |16.0000 |15.0000 |
|13.2444 |13.0000 |13.0000 |
|17.9260 |18.0000 |17.0000 |
...
+--------------------+------------------+------------------+
Obcinanie usuwa wszystkie cyfry po wskazanym miejscu
Czas na ćwiczenia!
SQL Server średnio zaawansowany
