SELECT TRUNC(MONTHS_BETWEEN(‘20230531’, TO_DATE(SUBSTR('210902198606141017', 7, 8), 'YYYYMMDD'))/12) AS age FROM dual;模拟运行一下

这个语句是用来计算身份证年龄的，但是您的身份证号码与日期不匹配，会导致计算出来的结果不准确。如果您想模拟运行这个语句，可以将语句中的身份证号码和日期分别替换为实际的身份证号码和日期，然后在Oracle数据库中运行，就能得到该身份证对应的年龄。例如，假设您的身份证号码为'210902198606141017'，出生日期为1986年6月14日，那么可以使用以下语句来计算您现在的年龄：

SELECT TRUNC(MONTHS_BETWEEN(SYSDATE, TO_DATE(SUBSTR('210902198606141017', 7, 8), 'YYYYMMDD'))/12) AS age FROM dual;

运行结果应该为35岁左右。

相关问题

SELECT TO_CHAR(ADD_MONTHS(ADD_MONTHS(sysdate, -24), ROWNUM - 1), 'YYYYMM') UNIT_DATE FROM DUAL CONNECT BY ROWNUM <= months_between(sysdate, ADD_MONTHS(sysdate, -24)) 替换成postgre

SELECT to_char(date_trunc('month', (CURRENT_DATE - interval '2 year')::timestamp) + (generate_series(0, date_part('year', age(CURRENT_DATE, (CURRENT_DATE - interval '2 year'))::interval) * 12 + date_part('month', age(CURRENT_DATE, (CURRENT_DATE - interval '2 year'))::interval)) * interval '1 month'), 'YYYYMM') AS UNIT_DATE FROM generate_series(0, date_part('year', age(CURRENT_DATE, (CURRENT_DATE - interval '2 year'))::interval) * 12 + date_part('month', age(CURRENT_DATE, (CURRENT_DATE - interval '2 year'))::interval)) AS t;

TRUNC( ( to_char( SYSDATE, 'yyyyMMdd' ) - to_char( BIRTH_DATE, 'yyyyMMdd' ) ) / 10000 ) AS age

The above SQL code calculates the age of a person based on their birth date and the current date.

Explanation of the code:

- SYSDATE is a built-in function in Oracle that returns the current system date and time.
- to_char() is a function that converts a date or timestamp value to a character string in a specified format.
- 'yyyyMMdd' is the date format used in this code, where 'yyyy' represents the year with four digits, 'MM' represents the month with two digits, and 'dd' represents the day with two digits.
- BIRTH_DATE is a column name in a table that stores the birth date of a person.
- The subtraction of the birth date from the current date yields the number of days between the two dates. This value is divided by 10000 to convert the number of days to years.
- TRUNC() is a function that truncates a number to a specified number of decimal places. In this code, it is used to remove any fractional part from the age value.

Overall, the code calculates the age of a person by subtracting their birth date from the current date, converting the result from days to years, and truncating any fractional part.