如何在 oracle 顶点表单中指定日期数据类型的日期格式

Question

I want to specify a specific format for a date column in Oracle Apex 19.2 form to limit the user to input the data in a specific format. For example, I want this query for a form to be valid:

Select phone_no, call_date, to_char(call_time, 'HH12:MI:SS AM') 
FROM called_no;

Note: call_date and call_time has the same data type which is date . I only have the problem with call_time column.

Answer 1

Well, format mask for call_time item would be as you said: hh12:mi:ss am .

If you didn't already do that, do it. If you did, what problems did you have?

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However, from my point of view, you're doing it wrong - you should use only one column: call_date whose datatype is date and use it in Apex "as is". It (the item) would accept full date AND time in desired format, eg dd.mm.yyyy hh12:mi:ss am .

Because, if you use two columns/items, you'll hit a problem that call_time column's date component will be wrong . Have a look:

SQL> alter session set nls_date_Format = 'dd.mm.yyyy hh12:mi:ss am';

Session altered.

SQL> select sysdate,
  2         to_date('05:33:12', 'hh12:mi:ss pm') right_now
  3  from dual;

SYSDATE                RIGHT_NOW
---------------------- ----------------------
22.12.2021 05:34:19 PM 01.12.2021 05:33:12 AM
-----                  -----
today                  see this? Date component is truncated to 1st of current month

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