oracle - ORA-02253 : constraint specification not allowed here

Question

create table log_table(
log_id varchar2(1000) primary key,
voter_ID varchar2(1000),
date_logged date
CONSTRAINT abc FOREIGN KEY (voter_ID) REFERENCES voters(voter_ID)
)

当我在没有日期元素的情况下创建它时，该表有效。但是当我向它添加日期元素时，它说:

ORA-02253: constraint specification not allowed here

Answer 1

The table works when i create it without date element

create table log_table(
log_id varchar2(1000) primary key,
voter_ID varchar2(1000),   -- comma
CONSTRAINT abc FOREIGN KEY (voter_ID) REFERENCES voters(voter_ID)
)

你必须在约束前添加,:

create table log_table(
log_id varchar2(1000) primary key,
voter_ID varchar2(1000),
date_logged date, -- here
CONSTRAINT abc FOREIGN KEY (voter_ID) REFERENCES voters(voter_ID)
)

我还会将 log_id/voter_id 的数据类型重新考虑为 (NUMBER/INTEGER)。