to_date函数pl/sql

Question

undefine dates

declare
  v_dateInput VARCHAR(10);
  v_dates DATE;
begin
  v_dateInput := &&dates;
  v_dates := to_date(v_dateInput,'dd-mm-yyyy');
  DBMS_OUTPUT.put_line(v_dates);
end;

不确定为什么每当我运行此代码时,例如03-03-1990的输入,此错误就会显示出来.

Error report:
ORA-01847: day of month must be between 1 and last day of month
ORA-06512: at line 6
01847. 00000 -  "day of month must be between 1 and last day of month"
*Cause:    
*Action:

Answer 1

哈,好的.这是因为&&替换了该变量,因此您的脚本变为:

declare
  v_dateInput VARCHAR(10);
  v_dates DATE;
begin
  v_dateInput := 03-03-1990;
  v_dates := to_date(v_dateInput,'dd-mm-yyyy');
  DBMS_OUTPUT.put_line(v_dates);
end;

请注意没有引号.v_dateInput实际上是'-1990',因为oracle计算03 - 03 - 1990的数值.当然,这不适用于给定的格式字符串.

要解决它,你需要

v_dateInput := '&&dates';