ORA-01858:在需要数字的地方找到了一个非数字字符?

Question

我需要 reg_date 将自动生成为当前系统日期的列值。

本声明:

CREATE TABLE medina_student (
  sno      NUMBER(7)              NOT NULL,
  sname    VARCHAR2(20)           NOT NULL,
  dept     VARCHAR2(5)            NOT NULL,
  reg_date DATE DEFAULT 'sysdate' NOT NULL,
  CONSTRAINT sno_pk PRIMARY KEY (sno),
  CONSTRAINT sna_u UNIQUE (sname)
);

产生错误

reg_date date default 'sysdate' not null ,
                      *
ERROR at line 5:
ORA-01858: a non-numeric character was found where a numeric was expected

如何解决它？

Answer 1

错误确实在第5行，删除 ':

reg_date date default sysdate not null