sql - 从 Oracle 日期中删除前导零

Question

我想以以下格式输出当前日期:

1-1-2015 

所以在这个例子中没有零:

SELECT TO_CHAR(SYSDATE, 'DD-MM-YYYY') AS today 
FROM dual

输出:

17-06-2015

Answer 1

你可以在MM之前使用fm。

询问

SELECT TO_CHAR (SYSDATE, 'DD-fmMM-YYYY') AS today FROM dual;

输出

17-6-2015

http://docs.oracle.com/cd/B28359_01/server.111/b28286/sql_elements004.htm#SQLRF00216

添加:

要删除所有前导零:

SELECT TO_CHAR (TO_DATE('01-01-2015', 'DD-MM-YYYY'), 'fmDD-MM-YYYY') AS today FROM dual;

1-1-2015

要从月份编号中删除前导零:

SELECT TO_CHAR (TO_DATE('01-01-2015', 'DD-MM-YYYY'), 'DD-fmMM-YYYY') AS today FROM dual;

01-1-2015

fm 用作开关。在这个例子中，DD 很好，但 MM 又是前导零。

SELECT TO_CHAR (TO_DATE('01-01-2015', 'DD-MM-YYYY'), 'fmDD-fmMM-YYYY') AS today FROM dual;

1-01-2015