Question

create table approval
(
    app_id smallint not null,
    visitor_id smallint(5),
    approve varchar(5),

    primary key (app_id) auto increment
    foreign key (visitor_id) references trans_req_visitor(visitor_id)
    constraint approval check (approval in ('TRUE', 'FALSE'))
);

我找不到导致错误的地方，我在哪里弄错了？

Answer 1

之后缺少逗号

primary key (app_id) auto increment

将您的查询更改为

create table approval(
app_id smallint not null,
visitor_id smallint(5),
approve varchar(5),
primary key (app_id) auto_increment,
FOREIGN KEY (visitor_id) REFERENCES trans_req_visitor(visitor_id),
constraint approval check (approval in ('TRUE', 'FALSE'))
);

Answer 2

auto increment和REFERENCES trans_req_visitor(visitor_id)

附近缺少逗号

试试这个

create table approval(
app_id smallint not null AUTO_INCREMENT,
visitor_id smallint(5),
approve varchar(5),
primary key (app_id),
FOREIGN KEY (visitor_id) REFERENCES trans_req_visitor(visitor_id),
constraint approval check (approval in ('TRUE', 'FALSE'))
);

Answer 3

你需要这样做：

create table approval(
app_id smallint not null auto_increment,
visitor_id smallint(5),
approve varchar(5),
primary key (app_id),
FOREIGN KEY (visitor_id) REFERENCES trans_req_visitor(visitor_id),
constraint approval check (approval in ('TRUE', 'FALSE'))
);

（错过逗号，错误输入和错位auto_increment）

MySQL不支持

注意 check。出于兼容性原因，此语法仅允许。

错误代码1064引发，可能是语法错误

3 个答案: