Sql 在oracle中屏蔽日期而不更改年份_Sql_Oracle

Sql 在oracle中屏蔽日期而不更改年份

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Sql 在oracle中屏蔽日期而不更改年份,sql,oracle,Sql,Oracle,我有一个脚本，我可以运行，以掩盖日期刚刚好。我的要求是日期不能向前移动，日历年不能更改，一月一日不能更改我当前的代码在-1到-85天之间随机更改日期；但是我不确定是否应该将其更改为查询Julian日期，这样我就不会更改日历年…欢迎提供任何见解或帮助 create or replace FUNCTION a_function (a_date DATE) RETURN DATE AS a_val NUMBER; a_val1 NUMBER; a_date DATE; a_date1

我有一个脚本，我可以运行，以掩盖日期刚刚好。我的要求是日期不能向前移动，日历年不能更改，一月一日不能更改

我当前的代码在-1到-85天之间随机更改日期；但是我不确定是否应该将其更改为查询Julian日期，这样我就不会更改日历年…欢迎提供任何见解或帮助

create or replace FUNCTION a_function (a_date DATE)
RETURN DATE
AS
a_val    NUMBER;
a_val1   NUMBER;
a_date   DATE;
a_date1  DATE;
BEGIN
a_val := DBMS_RANDOM.VALUE (1, 85);
a_date := a_date + a_val;
IF TO_CHAR (a_date, 'YYYY') <> TO_CHAR (a_date, 'YYYY')
THEN
  a_val1 := DBMS_RANDOM.VALUE (-1, -85);
  a_date1 := a_date + (a_val1);
  RETURN a_date1;
 ELSE
  RETURN a_date;
END IF;
END;

创建或替换函数a_函数（a_日期）
返回日期
作为
数值；
a_val1号；
日期；
a_date1日期；
开始
a_val:=DBMS_RANDOM.VALUE（1,85）；
a_日期：=a_日期+a_值；
如果到字符（日期'YYYY'）到字符（日期'YYYY'）
然后
a_val1:=DBMS_RANDOM.VALUE（-1，-85）；
a_date1:=a_date+（a_val1）；
返回日期1；
其他的
返回一个日期；
如果结束；
结束；

我想试试

create or replace function a_function( a_date date )
  return date
is
  l_max_days integer;
begin
  -- Don't change dates that occur on the first of the year2
  if trunc(a_date) = trunc(a_date, 'YYYY')
  then
    return a_date;
  end if;

  l_max_days := to_number( to_char( a_date, 'DDD' ) ) - 1;
  return trunc(a_date, 'YYYY') + dbms_random.value( 0, l_max_days );
end;

它获取一年中某个日期的日期，减去1，然后生成一个介于0和l_max_天之间的天数。因此，如果

a_date

是，比如说，1月10日，l_max_days是9天，我们在一年的第一天加上0到8天，得到的日期是1月1日到1月9日。如果要允许返回的日期与输入日期匹配，可以从

l\u max\u days

中删除

-1

我想试试这样的东西

create or replace function a_function( a_date date )
  return date
is
  l_max_days integer;
begin
  -- Don't change dates that occur on the first of the year2
  if trunc(a_date) = trunc(a_date, 'YYYY')
  then
    return a_date;
  end if;

  l_max_days := to_number( to_char( a_date, 'DDD' ) ) - 1;
  return trunc(a_date, 'YYYY') + dbms_random.value( 0, l_max_days );
end;

它获取一年中某个日期的日期，减去1，然后生成一个介于0和l_max_天之间的天数。因此，如果

a_date

是，比如说，1月10日，l_max_days是9天，我们在一年的第一天加上0到8天，得到的日期是1月1日到1月9日。如果要允许返回的日期与输入日期匹配，可以从

l\u max\u days

中删除

-1

两个选项：第一，获取一个随机较早的日期/时间；第二，获取一个随机的较早日期（没有时间成分）

Oracle 11g R2架构设置：

CREATE FUNCTION get_Random_Earlier_Datetime(
  in_date DATE
) RETURN DATE
AS
BEGIN
  RETURN TRUNC( in_date, 'Y' ) + DBMS_RANDOM.VALUE( 0, in_date - TRUNC( in_date, 'Y' ) );
END;
/

CREATE FUNCTION get_Random_Earlier_Day(
  in_date DATE
) RETURN DATE
AS
BEGIN
  RETURN TRUNC( in_date, 'Y' ) + FLOOR( DBMS_RANDOM.VALUE( 0, in_date - TRUNC( in_date, 'Y' ) ) );
END;
/

SELECT DATE '2015-01-01' + LEVEL - 1 AS "Date",
       get_Random_Earlier_Datetime( DATE '2015-01-01' + LEVEL - 1 ),
       get_Random_Earlier_Day( DATE '2015-01-01' + LEVEL - 1 )
FROM   DUAL
CONNECT BY LEVEL <= 10

|                      Date | GET_RANDOM_EARLIER_DATETIME(DATE'2015-01-01'+LEVEL-1) | GET_RANDOM_EARLIER_DAY(DATE'2015-01-01'+LEVEL-1) |
|---------------------------|-------------------------------------------------------|--------------------------------------------------|
| January, 01 2015 00:00:00 |                             January, 01 2015 00:00:00 |                        January, 01 2015 00:00:00 |
| January, 02 2015 00:00:00 |                             January, 01 2015 14:11:37 |                        January, 01 2015 00:00:00 |
| January, 03 2015 00:00:00 |                             January, 01 2015 09:24:25 |                        January, 01 2015 00:00:00 |
| January, 04 2015 00:00:00 |                             January, 01 2015 00:45:22 |                        January, 03 2015 00:00:00 |
| January, 05 2015 00:00:00 |                             January, 03 2015 11:54:39 |                        January, 04 2015 00:00:00 |
| January, 06 2015 00:00:00 |                             January, 05 2015 03:55:55 |                        January, 01 2015 00:00:00 |
| January, 07 2015 00:00:00 |                             January, 04 2015 01:12:23 |                        January, 02 2015 00:00:00 |
| January, 08 2015 00:00:00 |                             January, 06 2015 22:10:37 |                        January, 02 2015 00:00:00 |
| January, 09 2015 00:00:00 |                             January, 06 2015 10:47:04 |                        January, 04 2015 00:00:00 |
| January, 10 2015 00:00:00 |                             January, 06 2015 07:20:25 |                        January, 08 2015 00:00:00 |

查询1：

CREATE FUNCTION get_Random_Earlier_Datetime(
  in_date DATE
) RETURN DATE
AS
BEGIN
  RETURN TRUNC( in_date, 'Y' ) + DBMS_RANDOM.VALUE( 0, in_date - TRUNC( in_date, 'Y' ) );
END;
/

CREATE FUNCTION get_Random_Earlier_Day(
  in_date DATE
) RETURN DATE
AS
BEGIN
  RETURN TRUNC( in_date, 'Y' ) + FLOOR( DBMS_RANDOM.VALUE( 0, in_date - TRUNC( in_date, 'Y' ) ) );
END;
/

SELECT DATE '2015-01-01' + LEVEL - 1 AS "Date",
       get_Random_Earlier_Datetime( DATE '2015-01-01' + LEVEL - 1 ),
       get_Random_Earlier_Day( DATE '2015-01-01' + LEVEL - 1 )
FROM   DUAL
CONNECT BY LEVEL <= 10

|                      Date | GET_RANDOM_EARLIER_DATETIME(DATE'2015-01-01'+LEVEL-1) | GET_RANDOM_EARLIER_DAY(DATE'2015-01-01'+LEVEL-1) |
|---------------------------|-------------------------------------------------------|--------------------------------------------------|
| January, 01 2015 00:00:00 |                             January, 01 2015 00:00:00 |                        January, 01 2015 00:00:00 |
| January, 02 2015 00:00:00 |                             January, 01 2015 14:11:37 |                        January, 01 2015 00:00:00 |
| January, 03 2015 00:00:00 |                             January, 01 2015 09:24:25 |                        January, 01 2015 00:00:00 |
| January, 04 2015 00:00:00 |                             January, 01 2015 00:45:22 |                        January, 03 2015 00:00:00 |
| January, 05 2015 00:00:00 |                             January, 03 2015 11:54:39 |                        January, 04 2015 00:00:00 |
| January, 06 2015 00:00:00 |                             January, 05 2015 03:55:55 |                        January, 01 2015 00:00:00 |
| January, 07 2015 00:00:00 |                             January, 04 2015 01:12:23 |                        January, 02 2015 00:00:00 |
| January, 08 2015 00:00:00 |                             January, 06 2015 22:10:37 |                        January, 02 2015 00:00:00 |
| January, 09 2015 00:00:00 |                             January, 06 2015 10:47:04 |                        January, 04 2015 00:00:00 |
| January, 10 2015 00:00:00 |                             January, 06 2015 07:20:25 |                        January, 08 2015 00:00:00 |

两个选项：第一，获取随机较早的日期/时间；第二，获取一个随机的较早日期（没有时间成分）

Oracle 11g R2架构设置：

CREATE FUNCTION get_Random_Earlier_Datetime(
  in_date DATE
) RETURN DATE
AS
BEGIN
  RETURN TRUNC( in_date, 'Y' ) + DBMS_RANDOM.VALUE( 0, in_date - TRUNC( in_date, 'Y' ) );
END;
/

CREATE FUNCTION get_Random_Earlier_Day(
  in_date DATE
) RETURN DATE
AS
BEGIN
  RETURN TRUNC( in_date, 'Y' ) + FLOOR( DBMS_RANDOM.VALUE( 0, in_date - TRUNC( in_date, 'Y' ) ) );
END;
/

SELECT DATE '2015-01-01' + LEVEL - 1 AS "Date",
       get_Random_Earlier_Datetime( DATE '2015-01-01' + LEVEL - 1 ),
       get_Random_Earlier_Day( DATE '2015-01-01' + LEVEL - 1 )
FROM   DUAL
CONNECT BY LEVEL <= 10

|                      Date | GET_RANDOM_EARLIER_DATETIME(DATE'2015-01-01'+LEVEL-1) | GET_RANDOM_EARLIER_DAY(DATE'2015-01-01'+LEVEL-1) |
|---------------------------|-------------------------------------------------------|--------------------------------------------------|
| January, 01 2015 00:00:00 |                             January, 01 2015 00:00:00 |                        January, 01 2015 00:00:00 |
| January, 02 2015 00:00:00 |                             January, 01 2015 14:11:37 |                        January, 01 2015 00:00:00 |
| January, 03 2015 00:00:00 |                             January, 01 2015 09:24:25 |                        January, 01 2015 00:00:00 |
| January, 04 2015 00:00:00 |                             January, 01 2015 00:45:22 |                        January, 03 2015 00:00:00 |
| January, 05 2015 00:00:00 |                             January, 03 2015 11:54:39 |                        January, 04 2015 00:00:00 |
| January, 06 2015 00:00:00 |                             January, 05 2015 03:55:55 |                        January, 01 2015 00:00:00 |
| January, 07 2015 00:00:00 |                             January, 04 2015 01:12:23 |                        January, 02 2015 00:00:00 |
| January, 08 2015 00:00:00 |                             January, 06 2015 22:10:37 |                        January, 02 2015 00:00:00 |
| January, 09 2015 00:00:00 |                             January, 06 2015 10:47:04 |                        January, 04 2015 00:00:00 |
| January, 10 2015 00:00:00 |                             January, 06 2015 07:20:25 |                        January, 08 2015 00:00:00 |

查询1：

CREATE FUNCTION get_Random_Earlier_Datetime(
  in_date DATE
) RETURN DATE
AS
BEGIN
  RETURN TRUNC( in_date, 'Y' ) + DBMS_RANDOM.VALUE( 0, in_date - TRUNC( in_date, 'Y' ) );
END;
/

CREATE FUNCTION get_Random_Earlier_Day(
  in_date DATE
) RETURN DATE
AS
BEGIN
  RETURN TRUNC( in_date, 'Y' ) + FLOOR( DBMS_RANDOM.VALUE( 0, in_date - TRUNC( in_date, 'Y' ) ) );
END;
/

SELECT DATE '2015-01-01' + LEVEL - 1 AS "Date",
       get_Random_Earlier_Datetime( DATE '2015-01-01' + LEVEL - 1 ),
       get_Random_Earlier_Day( DATE '2015-01-01' + LEVEL - 1 )
FROM   DUAL
CONNECT BY LEVEL <= 10

|                      Date | GET_RANDOM_EARLIER_DATETIME(DATE'2015-01-01'+LEVEL-1) | GET_RANDOM_EARLIER_DAY(DATE'2015-01-01'+LEVEL-1) |
|---------------------------|-------------------------------------------------------|--------------------------------------------------|
| January, 01 2015 00:00:00 |                             January, 01 2015 00:00:00 |                        January, 01 2015 00:00:00 |
| January, 02 2015 00:00:00 |                             January, 01 2015 14:11:37 |                        January, 01 2015 00:00:00 |
| January, 03 2015 00:00:00 |                             January, 01 2015 09:24:25 |                        January, 01 2015 00:00:00 |
| January, 04 2015 00:00:00 |                             January, 01 2015 00:45:22 |                        January, 03 2015 00:00:00 |
| January, 05 2015 00:00:00 |                             January, 03 2015 11:54:39 |                        January, 04 2015 00:00:00 |
| January, 06 2015 00:00:00 |                             January, 05 2015 03:55:55 |                        January, 01 2015 00:00:00 |
| January, 07 2015 00:00:00 |                             January, 04 2015 01:12:23 |                        January, 02 2015 00:00:00 |
| January, 08 2015 00:00:00 |                             January, 06 2015 22:10:37 |                        January, 02 2015 00:00:00 |
| January, 09 2015 00:00:00 |                             January, 06 2015 10:47:04 |                        January, 04 2015 00:00:00 |
| January, 10 2015 00:00:00 |                             January, 06 2015 07:20:25 |                        January, 08 2015 00:00:00 |

请编辑您的问题，并提供样本数据和所需结果。样本数据可以是任何日期：01-Jan-00此日期永远不会更改（因为它是1月1日。34年7月7日可以更改为1934年内的任何日期。请编辑您的问题并提供样本数据和所需结果。样本数据将是任何日期：00年1月1日此日期永远不会更改（因为它是1月1日。34年7月7日可以更改为1934年内的任何日期）。