Oracle 甲骨文圆半平
是否有任何Oracle函数来执行半轮偶数 我找到了这篇文章，但是我无法在Oracle中使用它Oracle 甲骨文圆半平,oracle,Oracle,是否有任何Oracle函数来执行半轮偶数 我找到了这篇文章，但是我无法在Oracle中使用它 CREATE FUNCTION roundHalfEven (numberToRound IN NUMBER, roundPrecision IN NUMBER) RETURN NUMBER IS roundedNumber NUMBER; BEGIN DECLARE digitEvenOdd NUMBER; DECLARE digitPosition N
CREATE FUNCTION roundHalfEven (numberToRound IN NUMBER, roundPrecision IN NUMBER)
RETURN NUMBER
IS roundedNumber NUMBER;
BEGIN
DECLARE digitEvenOdd NUMBER;
DECLARE digitPosition NUMBER;
DECLARE digitToRound NUMBER;
DECLARE roundedNumber DECIMAL(20,6) DEFAULT 0;
SET digitPosition = INSTR(numberToRound, '.');
IF (roundingPrecision < 1) THEN
SET digitPosition = digitPosition + roundingPrecision;
ELSE
SET digitPosition = digitPosition + roundingPrecision + 1;
END IF;
IF (digitPosition > 0 AND digitPosition <= CHAR_LENGTH(numberToRound)) THEN
SET digitToRound = CAST(SUBSTR(numberToRound, digitPosition, 1) AS UNSIGNED);
SET digitPosition = digitPosition - 1;
IF (digitPosition > 0 AND digitPosition <= CHAR_LENGTH(numberToRound)) THEN
SET digitEvenOdd = CAST(SUBSTR(numberToRound, digitPosition, 1) AS UNSIGNED);
END IF;
END IF;
IF (digitToRound > -1) THEN
IF (digitToRound >= 5 AND digitEvenOdd IN (1,3,5,7,9)) THEN
SET roundedNumber = ROUND(numberToRound, roundingPrecision);
ELSE
SET roundedNumber = TRUNCATE(numberToRound, roundingPrecision);
END IF;
ELSE IF (roundingPrecision > 0) THEN
SET roundedNumber = numberToRound;
END IF;
RETURN(roundedNumber);
END;
/
创建函数roundhalf偶数（numberToRound在数字中，roundPrecision在数字中）
返回号码
是舍入数；
开始
声明数字奇数；
申报数字位置号；
申报数码管号；
声明舍入数字十进制（20,6）默认为0；
设置数字位置=仪表（数字四舍五入'）；
如果（圆整精度<1），则
设置digitPosition=digitPosition+roundingPrecision；
其他的
设置digitPosition=digitPosition+roundingPrecision+1；
如果结束；
如果（digitPosition>0和digitPosition 0和digitPosition-1），则
如果（digitToRound>=5和（1,3,5,7,9）中的DigitVenOdd），则
设置roundedNumber=舍入（numberToRound，舍入精度）；
其他的
设置roundedNumber=TRUNCATE（numberToRound，roundingPrecision）；
如果结束；
否则，如果（舍入精度>0），则
设置roundedNumber=numberToRound；
如果结束；
返回（舍入编号）；
结束；
/
CREATE TABLE test_data( value ) AS
SELECT (LEVEL -11)/2 FROM DUAL CONNECT BY LEVEL <= 21;
SELECT value,
ROUND( value ),
CASE
WHEN MOD( ABS( value ), 2 ) = 0.5
THEN TRUNC( value )
ELSE ROUND( value )
END AS round_half_even
FROM test_data
| VALUE | ROUND(VALUE) | ROUND_HALF_EVEN |
|-------|--------------|-----------------|
| -5 | -5 | -5 |
| -4.5 | -5 | -4 |
| -4 | -4 | -4 |
| -3.5 | -4 | -4 |
| -3 | -3 | -3 |
| -2.5 | -3 | -2 |
| -2 | -2 | -2 |
| -1.5 | -2 | -2 |
| -1 | -1 | -1 |
| -0.5 | -1 | 0 |
| 0 | 0 | 0 |
| 0.5 | 1 | 0 |
| 1 | 1 | 1 |
| 1.5 | 2 | 2 |
| 2 | 2 | 2 |
| 2.5 | 3 | 2 |
| 3 | 3 | 3 |
| 3.5 | 4 | 4 |
| 4 | 4 | 4 |
| 4.5 | 5 | 4 |
| 5 | 5 | 5 |
CREATE TABLE test_data( value ) AS
SELECT (LEVEL -11)/20 FROM DUAL CONNECT BY LEVEL <= 21
/
CREATE FUNCTION round_half_even(
value NUMBER,
prec INTEGER DEFAULT 0
) RETURN NUMBER
IS
whole NUMBER := POWER( 10, -prec );
BEGIN
RETURN CASE
WHEN ABS( MOD( value, 2*whole ) ) = 0.5*whole
THEN TRUNC( value, prec )
ELSE ROUND( value, prec )
END;
END;
/
SELECT value,
ROUND( value , 1),
round_half_even( value, 1 )
FROM test_data
| VALUE | ROUND(VALUE,1) | ROUND_HALF_EVEN(VALUE,1) |
|-------|----------------|--------------------------|
| -0.5 | -0.5 | -0.5 |
| -0.45 | -0.5 | -0.4 |
| -0.4 | -0.4 | -0.4 |
| -0.35 | -0.4 | -0.4 |
| -0.3 | -0.3 | -0.3 |
| -0.25 | -0.3 | -0.2 |
| -0.2 | -0.2 | -0.2 |
| -0.15 | -0.2 | -0.2 |
| -0.1 | -0.1 | -0.1 |
| -0.05 | -0.1 | 0 |
| 0 | 0 | 0 |
| 0.05 | 0.1 | 0 |
| 0.1 | 0.1 | 0.1 |
| 0.15 | 0.2 | 0.2 |
| 0.2 | 0.2 | 0.2 |
| 0.25 | 0.3 | 0.2 |
| 0.3 | 0.3 | 0.3 |
| 0.35 | 0.4 | 0.4 |
| 0.4 | 0.4 | 0.4 |
| 0.45 | 0.5 | 0.4 |
| 0.5 | 0.5 | 0.5 |
CREATE TABLE test_data( value ) AS
SELECT (LEVEL -11)/2 FROM DUAL CONNECT BY LEVEL <= 21;
SELECT value,
ROUND( value ),
CASE
WHEN MOD( ABS( value ), 2 ) = 0.5
THEN TRUNC( value )
ELSE ROUND( value )
END AS round_half_even
FROM test_data
| VALUE | ROUND(VALUE) | ROUND_HALF_EVEN |
|-------|--------------|-----------------|
| -5 | -5 | -5 |
| -4.5 | -5 | -4 |
| -4 | -4 | -4 |
| -3.5 | -4 | -4 |
| -3 | -3 | -3 |
| -2.5 | -3 | -2 |
| -2 | -2 | -2 |
| -1.5 | -2 | -2 |
| -1 | -1 | -1 |
| -0.5 | -1 | 0 |
| 0 | 0 | 0 |
| 0.5 | 1 | 0 |
| 1 | 1 | 1 |
| 1.5 | 2 | 2 |
| 2 | 2 | 2 |
| 2.5 | 3 | 2 |
| 3 | 3 | 3 |
| 3.5 | 4 | 4 |
| 4 | 4 | 4 |
| 4.5 | 5 | 4 |
| 5 | 5 | 5 |
CREATE TABLE test_data( value ) AS
SELECT (LEVEL -11)/20 FROM DUAL CONNECT BY LEVEL <= 21
/
CREATE FUNCTION round_half_even(
value NUMBER,
prec INTEGER DEFAULT 0
) RETURN NUMBER
IS
whole NUMBER := POWER( 10, -prec );
BEGIN
RETURN CASE
WHEN ABS( MOD( value, 2*whole ) ) = 0.5*whole
THEN TRUNC( value, prec )
ELSE ROUND( value, prec )
END;
END;
/
SELECT value,
ROUND( value , 1),
round_half_even( value, 1 )
FROM test_data
| VALUE | ROUND(VALUE,1) | ROUND_HALF_EVEN(VALUE,1) |
|-------|----------------|--------------------------|
| -0.5 | -0.5 | -0.5 |
| -0.45 | -0.5 | -0.4 |
| -0.4 | -0.4 | -0.4 |
| -0.35 | -0.4 | -0.4 |
| -0.3 | -0.3 | -0.3 |
| -0.25 | -0.3 | -0.2 |
| -0.2 | -0.2 | -0.2 |
| -0.15 | -0.2 | -0.2 |
| -0.1 | -0.1 | -0.1 |
| -0.05 | -0.1 | 0 |
| 0 | 0 | 0 |
| 0.05 | 0.1 | 0 |
| 0.1 | 0.1 | 0.1 |
| 0.15 | 0.2 | 0.2 |
| 0.2 | 0.2 | 0.2 |
| 0.25 | 0.3 | 0.2 |
| 0.3 | 0.3 | 0.3 |
| 0.35 | 0.4 | 0.4 |
| 0.4 | 0.4 | 0.4 |
| 0.45 | 0.5 | 0.4 |
| 0.5 | 0.5 | 0.5 |
CREATE TABLE test_data( value ) AS
SELECT (LEVEL -11)/2 FROM DUAL CONNECT BY LEVEL <= 21;
SELECT value,
ROUND( value ),
CASE
WHEN MOD( ABS( value ), 2 ) = 0.5
THEN TRUNC( value )
ELSE ROUND( value )
END AS round_half_even
FROM test_data
| VALUE | ROUND(VALUE) | ROUND_HALF_EVEN |
|-------|--------------|-----------------|
| -5 | -5 | -5 |
| -4.5 | -5 | -4 |
| -4 | -4 | -4 |
| -3.5 | -4 | -4 |
| -3 | -3 | -3 |
| -2.5 | -3 | -2 |
| -2 | -2 | -2 |
| -1.5 | -2 | -2 |
| -1 | -1 | -1 |
| -0.5 | -1 | 0 |
| 0 | 0 | 0 |
| 0.5 | 1 | 0 |
| 1 | 1 | 1 |
| 1.5 | 2 | 2 |
| 2 | 2 | 2 |
| 2.5 | 3 | 2 |
| 3 | 3 | 3 |
| 3.5 | 4 | 4 |
| 4 | 4 | 4 |
| 4.5 | 5 | 4 |
| 5 | 5 | 5 |
CREATE TABLE test_data( value ) AS
SELECT (LEVEL -11)/20 FROM DUAL CONNECT BY LEVEL <= 21
/
CREATE FUNCTION round_half_even(
value NUMBER,
prec INTEGER DEFAULT 0
) RETURN NUMBER
IS
whole NUMBER := POWER( 10, -prec );
BEGIN
RETURN CASE
WHEN ABS( MOD( value, 2*whole ) ) = 0.5*whole
THEN TRUNC( value, prec )
ELSE ROUND( value, prec )
END;
END;
/
SELECT value,
ROUND( value , 1),
round_half_even( value, 1 )
FROM test_data
| VALUE | ROUND(VALUE,1) | ROUND_HALF_EVEN(VALUE,1) |
|-------|----------------|--------------------------|
| -0.5 | -0.5 | -0.5 |
| -0.45 | -0.5 | -0.4 |
| -0.4 | -0.4 | -0.4 |
| -0.35 | -0.4 | -0.4 |
| -0.3 | -0.3 | -0.3 |
| -0.25 | -0.3 | -0.2 |
| -0.2 | -0.2 | -0.2 |
| -0.15 | -0.2 | -0.2 |
| -0.1 | -0.1 | -0.1 |
| -0.05 | -0.1 | 0 |
| 0 | 0 | 0 |
| 0.05 | 0.1 | 0 |
| 0.1 | 0.1 | 0.1 |
| 0.15 | 0.2 | 0.2 |
| 0.2 | 0.2 | 0.2 |
| 0.25 | 0.3 | 0.2 |
| 0.3 | 0.3 | 0.3 |
| 0.35 | 0.4 | 0.4 |
| 0.4 | 0.4 | 0.4 |
| 0.45 | 0.5 | 0.4 |
| 0.5 | 0.5 | 0.5 |
CREATE TABLE test_data( value ) AS
SELECT (LEVEL -11)/2 FROM DUAL CONNECT BY LEVEL <= 21;
SELECT value,
ROUND( value ),
CASE
WHEN MOD( ABS( value ), 2 ) = 0.5
THEN TRUNC( value )
ELSE ROUND( value )
END AS round_half_even
FROM test_data
| VALUE | ROUND(VALUE) | ROUND_HALF_EVEN |
|-------|--------------|-----------------|
| -5 | -5 | -5 |
| -4.5 | -5 | -4 |
| -4 | -4 | -4 |
| -3.5 | -4 | -4 |
| -3 | -3 | -3 |
| -2.5 | -3 | -2 |
| -2 | -2 | -2 |
| -1.5 | -2 | -2 |
| -1 | -1 | -1 |
| -0.5 | -1 | 0 |
| 0 | 0 | 0 |
| 0.5 | 1 | 0 |
| 1 | 1 | 1 |
| 1.5 | 2 | 2 |
| 2 | 2 | 2 |
| 2.5 | 3 | 2 |
| 3 | 3 | 3 |
| 3.5 | 4 | 4 |
| 4 | 4 | 4 |
| 4.5 | 5 | 4 |
| 5 | 5 | 5 |
CREATE TABLE test_data( value ) AS
SELECT (LEVEL -11)/20 FROM DUAL CONNECT BY LEVEL <= 21
/
CREATE FUNCTION round_half_even(
value NUMBER,
prec INTEGER DEFAULT 0
) RETURN NUMBER
IS
whole NUMBER := POWER( 10, -prec );
BEGIN
RETURN CASE
WHEN ABS( MOD( value, 2*whole ) ) = 0.5*whole
THEN TRUNC( value, prec )
ELSE ROUND( value, prec )
END;
END;
/
SELECT value,
ROUND( value , 1),
round_half_even( value, 1 )
FROM test_data
| VALUE | ROUND(VALUE,1) | ROUND_HALF_EVEN(VALUE,1) |
|-------|----------------|--------------------------|
| -0.5 | -0.5 | -0.5 |
| -0.45 | -0.5 | -0.4 |
| -0.4 | -0.4 | -0.4 |
| -0.35 | -0.4 | -0.4 |
| -0.3 | -0.3 | -0.3 |
| -0.25 | -0.3 | -0.2 |
| -0.2 | -0.2 | -0.2 |
| -0.15 | -0.2 | -0.2 |
| -0.1 | -0.1 | -0.1 |
| -0.05 | -0.1 | 0 |
| 0 | 0 | 0 |
| 0.05 | 0.1 | 0 |
| 0.1 | 0.1 | 0.1 |
| 0.15 | 0.2 | 0.2 |
| 0.2 | 0.2 | 0.2 |
| 0.25 | 0.3 | 0.2 |
| 0.3 | 0.3 | 0.3 |
| 0.35 | 0.4 | 0.4 |
| 0.4 | 0.4 | 0.4 |
| 0.45 | 0.5 | 0.4 |
| 0.5 | 0.5 | 0.5 |
CREATE TABLE test_data( value ) AS
SELECT (LEVEL -11)/2 FROM DUAL CONNECT BY LEVEL <= 21;
SELECT value,
ROUND( value ),
CASE
WHEN MOD( ABS( value ), 2 ) = 0.5
THEN TRUNC( value )
ELSE ROUND( value )
END AS round_half_even
FROM test_data
| VALUE | ROUND(VALUE) | ROUND_HALF_EVEN |
|-------|--------------|-----------------|
| -5 | -5 | -5 |
| -4.5 | -5 | -4 |
| -4 | -4 | -4 |
| -3.5 | -4 | -4 |
| -3 | -3 | -3 |
| -2.5 | -3 | -2 |
| -2 | -2 | -2 |
| -1.5 | -2 | -2 |
| -1 | -1 | -1 |
| -0.5 | -1 | 0 |
| 0 | 0 | 0 |
| 0.5 | 1 | 0 |
| 1 | 1 | 1 |
| 1.5 | 2 | 2 |
| 2 | 2 | 2 |
| 2.5 | 3 | 2 |
| 3 | 3 | 3 |
| 3.5 | 4 | 4 |
| 4 | 4 | 4 |
| 4.5 | 5 | 4 |
| 5 | 5 | 5 |
CREATE TABLE test_data( value ) AS
SELECT (LEVEL -11)/20 FROM DUAL CONNECT BY LEVEL <= 21
/
CREATE FUNCTION round_half_even(
value NUMBER,
prec INTEGER DEFAULT 0
) RETURN NUMBER
IS
whole NUMBER := POWER( 10, -prec );
BEGIN
RETURN CASE
WHEN ABS( MOD( value, 2*whole ) ) = 0.5*whole
THEN TRUNC( value, prec )
ELSE ROUND( value, prec )
END;
END;
/
SELECT value,
ROUND( value , 1),
round_half_even( value, 1 )
FROM test_data
| VALUE | ROUND(VALUE,1) | ROUND_HALF_EVEN(VALUE,1) |
|-------|----------------|--------------------------|
| -0.5 | -0.5 | -0.5 |
| -0.45 | -0.5 | -0.4 |
| -0.4 | -0.4 | -0.4 |
| -0.35 | -0.4 | -0.4 |
| -0.3 | -0.3 | -0.3 |
| -0.25 | -0.3 | -0.2 |
| -0.2 | -0.2 | -0.2 |
| -0.15 | -0.2 | -0.2 |
| -0.1 | -0.1 | -0.1 |
| -0.05 | -0.1 | 0 |
| 0 | 0 | 0 |
| 0.05 | 0.1 | 0 |
| 0.1 | 0.1 | 0.1 |
| 0.15 | 0.2 | 0.2 |
| 0.2 | 0.2 | 0.2 |
| 0.25 | 0.3 | 0.2 |
| 0.3 | 0.3 | 0.3 |
| 0.35 | 0.4 | 0.4 |
| 0.4 | 0.4 | 0.4 |
| 0.45 | 0.5 | 0.4 |
| 0.5 | 0.5 | 0.5 |
CREATE TABLE test_data( value ) AS
SELECT (LEVEL -11)/2 FROM DUAL CONNECT BY LEVEL <= 21;
SELECT value,
ROUND( value ),
CASE
WHEN MOD( ABS( value ), 2 ) = 0.5
THEN TRUNC( value )
ELSE ROUND( value )
END AS round_half_even
FROM test_data
| VALUE | ROUND(VALUE) | ROUND_HALF_EVEN |
|-------|--------------|-----------------|
| -5 | -5 | -5 |
| -4.5 | -5 | -4 |
| -4 | -4 | -4 |
| -3.5 | -4 | -4 |
| -3 | -3 | -3 |
| -2.5 | -3 | -2 |
| -2 | -2 | -2 |
| -1.5 | -2 | -2 |
| -1 | -1 | -1 |
| -0.5 | -1 | 0 |
| 0 | 0 | 0 |
| 0.5 | 1 | 0 |
| 1 | 1 | 1 |
| 1.5 | 2 | 2 |
| 2 | 2 | 2 |
| 2.5 | 3 | 2 |
| 3 | 3 | 3 |
| 3.5 | 4 | 4 |
| 4 | 4 | 4 |
| 4.5 | 5 | 4 |
| 5 | 5 | 5 |
CREATE TABLE test_data( value ) AS
SELECT (LEVEL -11)/20 FROM DUAL CONNECT BY LEVEL <= 21
/
CREATE FUNCTION round_half_even(
value NUMBER,
prec INTEGER DEFAULT 0
) RETURN NUMBER
IS
whole NUMBER := POWER( 10, -prec );
BEGIN
RETURN CASE
WHEN ABS( MOD( value, 2*whole ) ) = 0.5*whole
THEN TRUNC( value, prec )
ELSE ROUND( value, prec )
END;
END;
/
SELECT value,
ROUND( value , 1),
round_half_even( value, 1 )
FROM test_data
| VALUE | ROUND(VALUE,1) | ROUND_HALF_EVEN(VALUE,1) |
|-------|----------------|--------------------------|
| -0.5 | -0.5 | -0.5 |
| -0.45 | -0.5 | -0.4 |
| -0.4 | -0.4 | -0.4 |
| -0.35 | -0.4 | -0.4 |
| -0.3 | -0.3 | -0.3 |
| -0.25 | -0.3 | -0.2 |
| -0.2 | -0.2 | -0.2 |
| -0.15 | -0.2 | -0.2 |
| -0.1 | -0.1 | -0.1 |
| -0.05 | -0.1 | 0 |
| 0 | 0 | 0 |
| 0.05 | 0.1 | 0 |
| 0.1 | 0.1 | 0.1 |
| 0.15 | 0.2 | 0.2 |
| 0.2 | 0.2 | 0.2 |
| 0.25 | 0.3 | 0.2 |
| 0.3 | 0.3 | 0.3 |
| 0.35 | 0.4 | 0.4 |
| 0.4 | 0.4 | 0.4 |
| 0.45 | 0.5 | 0.4 |
| 0.5 | 0.5 | 0.5 |
CREATE TABLE test_data( value ) AS
SELECT (LEVEL -11)/2 FROM DUAL CONNECT BY LEVEL <= 21;
SELECT value,
ROUND( value ),
CASE
WHEN MOD( ABS( value ), 2 ) = 0.5
THEN TRUNC( value )
ELSE ROUND( value )
END AS round_half_even
FROM test_data
| VALUE | ROUND(VALUE) | ROUND_HALF_EVEN |
|-------|--------------|-----------------|
| -5 | -5 | -5 |
| -4.5 | -5 | -4 |
| -4 | -4 | -4 |
| -3.5 | -4 | -4 |
| -3 | -3 | -3 |
| -2.5 | -3 | -2 |
| -2 | -2 | -2 |
| -1.5 | -2 | -2 |
| -1 | -1 | -1 |
| -0.5 | -1 | 0 |
| 0 | 0 | 0 |
| 0.5 | 1 | 0 |
| 1 | 1 | 1 |
| 1.5 | 2 | 2 |
| 2 | 2 | 2 |
| 2.5 | 3 | 2 |
| 3 | 3 | 3 |
| 3.5 | 4 | 4 |
| 4 | 4 | 4 |
| 4.5 | 5 | 4 |
| 5 | 5 | 5 |
CREATE TABLE test_data( value ) AS
SELECT (LEVEL -11)/20 FROM DUAL CONNECT BY LEVEL <= 21
/
CREATE FUNCTION round_half_even(
value NUMBER,
prec INTEGER DEFAULT 0
) RETURN NUMBER
IS
whole NUMBER := POWER( 10, -prec );
BEGIN
RETURN CASE
WHEN ABS( MOD( value, 2*whole ) ) = 0.5*whole
THEN TRUNC( value, prec )
ELSE ROUND( value, prec )
END;
END;
/
SELECT value,
ROUND( value , 1),
round_half_even( value, 1 )
FROM test_data
| VALUE | ROUND(VALUE,1) | ROUND_HALF_EVEN(VALUE,1) |
|-------|----------------|--------------------------|
| -0.5 | -0.5 | -0.5 |
| -0.45 | -0.5 | -0.4 |
| -0.4 | -0.4 | -0.4 |
| -0.35 | -0.4 | -0.4 |
| -0.3 | -0.3 | -0.3 |
| -0.25 | -0.3 | -0.2 |
| -0.2 | -0.2 | -0.2 |
| -0.15 | -0.2 | -0.2 |
| -0.1 | -0.1 | -0.1 |
| -0.05 | -0.1 | 0 |
| 0 | 0 | 0 |
| 0.05 | 0.1 | 0 |
| 0.1 | 0.1 | 0.1 |
| 0.15 | 0.2 | 0.2 |
| 0.2 | 0.2 | 0.2 |
| 0.25 | 0.3 | 0.2 |
| 0.3 | 0.3 | 0.3 |
| 0.35 | 0.4 | 0.4 |
| 0.4 | 0.4 | 0.4 |
| 0.45 | 0.5 | 0.4 |
| 0.5 | 0.5 | 0.5 |
CREATE TABLE test_data( value ) AS
SELECT (LEVEL -11)/2 FROM DUAL CONNECT BY LEVEL <= 21;
SELECT value,
ROUND( value ),
CASE
WHEN MOD( ABS( value ), 2 ) = 0.5
THEN TRUNC( value )
ELSE ROUND( value )
END AS round_half_even
FROM test_data
| VALUE | ROUND(VALUE) | ROUND_HALF_EVEN |
|-------|--------------|-----------------|
| -5 | -5 | -5 |
| -4.5 | -5 | -4 |
| -4 | -4 | -4 |
| -3.5 | -4 | -4 |
| -3 | -3 | -3 |
| -2.5 | -3 | -2 |
| -2 | -2 | -2 |
| -1.5 | -2 | -2 |
| -1 | -1 | -1 |
| -0.5 | -1 | 0 |
| 0 | 0 | 0 |
| 0.5 | 1 | 0 |
| 1 | 1 | 1 |
| 1.5 | 2 | 2 |
| 2 | 2 | 2 |
| 2.5 | 3 | 2 |
| 3 | 3 | 3 |
| 3.5 | 4 | 4 |
| 4 | 4 | 4 |
| 4.5 | 5 | 4 |
| 5 | 5 | 5 |
CREATE TABLE test_data( value ) AS
SELECT (LEVEL -11)/20 FROM DUAL CONNECT BY LEVEL <= 21
/
CREATE FUNCTION round_half_even(
value NUMBER,
prec INTEGER DEFAULT 0
) RETURN NUMBER
IS
whole NUMBER := POWER( 10, -prec );
BEGIN
RETURN CASE
WHEN ABS( MOD( value, 2*whole ) ) = 0.5*whole
THEN TRUNC( value, prec )
ELSE ROUND( value, prec )
END;
END;
/
SELECT value,
ROUND( value , 1),
round_half_even( value, 1 )
FROM test_data
| VALUE | ROUND(VALUE,1) | ROUND_HALF_EVEN(VALUE,1) |
|-------|----------------|--------------------------|
| -0.5 | -0.5 | -0.5 |
| -0.45 | -0.5 | -0.4 |
| -0.4 | -0.4 | -0.4 |
| -0.35 | -0.4 | -0.4 |
| -0.3 | -0.3 | -0.3 |
| -0.25 | -0.3 | -0.2 |
| -0.2 | -0.2 | -0.2 |
| -0.15 | -0.2 | -0.2 |
| -0.1 | -0.1 | -0.1 |
| -0.05 | -0.1 | 0 |
| 0 | 0 | 0 |
| 0.05 | 0.1 | 0 |
| 0.1 | 0.1 | 0.1 |
| 0.15 | 0.2 | 0.2 |
| 0.2 | 0.2 | 0.2 |
| 0.25 | 0.3 | 0.2 |
| 0.3 | 0.3 | 0.3 |
| 0.35 | 0.4 | 0.4 |
| 0.4 | 0.4 | 0.4 |
| 0.45 | 0.5 | 0.4 |
| 0.5 | 0.5 | 0.5 |
CREATE TABLE test_data( value ) AS
SELECT (LEVEL -11)/2 FROM DUAL CONNECT BY LEVEL <= 21;
SELECT value,
ROUND( value ),
CASE
WHEN MOD( ABS( value ), 2 ) = 0.5
THEN TRUNC( value )
ELSE ROUND( value )
END AS round_half_even
FROM test_data
| VALUE | ROUND(VALUE) | ROUND_HALF_EVEN |
|-------|--------------|-----------------|
| -5 | -5 | -5 |
| -4.5 | -5 | -4 |
| -4 | -4 | -4 |
| -3.5 | -4 | -4 |
| -3 | -3 | -3 |
| -2.5 | -3 | -2 |
| -2 | -2 | -2 |
| -1.5 | -2 | -2 |
| -1 | -1 | -1 |
| -0.5 | -1 | 0 |
| 0 | 0 | 0 |
| 0.5 | 1 | 0 |
| 1 | 1 | 1 |
| 1.5 | 2 | 2 |
| 2 | 2 | 2 |
| 2.5 | 3 | 2 |
| 3 | 3 | 3 |
| 3.5 | 4 | 4 |
| 4 | 4 | 4 |
| 4.5 | 5 | 4 |
| 5 | 5 | 5 |
CREATE TABLE test_data( value ) AS
SELECT (LEVEL -11)/20 FROM DUAL CONNECT BY LEVEL <= 21
/
CREATE FUNCTION round_half_even(
value NUMBER,
prec INTEGER DEFAULT 0
) RETURN NUMBER
IS
whole NUMBER := POWER( 10, -prec );
BEGIN
RETURN CASE
WHEN ABS( MOD( value, 2*whole ) ) = 0.5*whole
THEN TRUNC( value, prec )
ELSE ROUND( value, prec )
END;
END;
/
SELECT value,
ROUND( value , 1),
round_half_even( value, 1 )
FROM test_data
| VALUE | ROUND(VALUE,1) | ROUND_HALF_EVEN(VALUE,1) |
|-------|----------------|--------------------------|
| -0.5 | -0.5 | -0.5 |
| -0.45 | -0.5 | -0.4 |
| -0.4 | -0.4 | -0.4 |
| -0.35 | -0.4 | -0.4 |
| -0.3 | -0.3 | -0.3 |
| -0.25 | -0.3 | -0.2 |
| -0.2 | -0.2 | -0.2 |
| -0.15 | -0.2 | -0.2 |
| -0.1 | -0.1 | -0.1 |
| -0.05 | -0.1 | 0 |
| 0 | 0 | 0 |
| 0.05 | 0.1 | 0 |
| 0.1 | 0.1 | 0.1 |
| 0.15 | 0.2 | 0.2 |
| 0.2 | 0.2 | 0.2 |
| 0.25 | 0.3 | 0.2 |
| 0.3 | 0.3 | 0.3 |
| 0.35 | 0.4 | 0.4 |
| 0.4 | 0.4 | 0.4 |
| 0.45 | 0.5 | 0.4 |
| 0.5 | 0.5 | 0.5 |
CREATE TABLE test_data( value ) AS
SELECT (LEVEL -11)/2 FROM DUAL CONNECT BY LEVEL <= 21;
SELECT value,
ROUND( value ),
CASE
WHEN MOD( ABS( value ), 2 ) = 0.5
THEN TRUNC( value )
ELSE ROUND( value )
END AS round_half_even
FROM test_data
| VALUE | ROUND(VALUE) | ROUND_HALF_EVEN |
|-------|--------------|-----------------|
| -5 | -5 | -5 |
| -4.5 | -5 | -4 |
| -4 | -4 | -4 |
| -3.5 | -4 | -4 |
| -3 | -3 | -3 |
| -2.5 | -3 | -2 |
| -2 | -2 | -2 |
| -1.5 | -2 | -2 |
| -1 | -1 | -1 |
| -0.5 | -1 | 0 |
| 0 | 0 | 0 |
| 0.5 | 1 | 0 |
| 1 | 1 | 1 |
| 1.5 | 2 | 2 |
| 2 | 2 | 2 |
| 2.5 | 3 | 2 |
| 3 | 3 | 3 |
| 3.5 | 4 | 4 |
| 4 | 4 | 4 |
| 4.5 | 5 | 4 |
| 5 | 5 | 5 |
CREATE TABLE test_data( value ) AS
SELECT (LEVEL -11)/20 FROM DUAL CONNECT BY LEVEL <= 21
/
CREATE FUNCTION round_half_even(
value NUMBER,
prec INTEGER DEFAULT 0
) RETURN NUMBER
IS
whole NUMBER := POWER( 10, -prec );
BEGIN
RETURN CASE
WHEN ABS( MOD( value, 2*whole ) ) = 0.5*whole
THEN TRUNC( value, prec )
ELSE ROUND( value, prec )
END;
END;
/
SELECT value,
ROUND( value , 1),
round_half_even( value, 1 )
FROM test_data
| VALUE | ROUND(VALUE,1) | ROUND_HALF_EVEN(VALUE,1) |
|-------|----------------|--------------------------|
| -0.5 | -0.5 | -0.5 |
| -0.45 | -0.5 | -0.4 |
| -0.4 | -0.4 | -0.4 |
| -0.35 | -0.4 | -0.4 |
| -0.3 | -0.3 | -0.3 |
| -0.25 | -0.3 | -0.2 |
| -0.2 | -0.2 | -0.2 |
| -0.15 | -0.2 | -0.2 |
| -0.1 | -0.1 | -0.1 |
| -0.05 | -0.1 | 0 |
| 0 | 0 | 0 |
| 0.05 | 0.1 | 0 |
| 0.1 | 0.1 | 0.1 |
| 0.15 | 0.2 | 0.2 |
| 0.2 | 0.2 | 0.2 |
| 0.25 | 0.3 | 0.2 |
| 0.3 | 0.3 | 0.3 |
| 0.35 | 0.4 | 0.4 |
| 0.4 | 0.4 | 0.4 |
| 0.45 | 0.5 | 0.4 |
| 0.5 | 0.5 | 0.5 |
请回答您的问题，并根据这些数据添加一些内容和预期输出。请您的问题-不要在评论中发布代码或其他信息。还要添加您尝试的代码，这些代码“无法用于”您的问题-不要在评论中发布代码或其他信息。有一个链接，可以满足您的问题，并根据该数据添加一些内容和预期输出。请您的问题-不要在评论中发布代码或其他信息。还要添加您尝试的代码，这些代码“无法用于”您的问题-不要在评论中发布代码或其他信息。链接到