Question

我正在尝试使用以下代码创建两个表。

CREATE TABLE assessments (
  id INT UNIQUE PRIMARY KEY,
  name VARCHAR(100),
  type VARCHAR(10),
  total_points NUMERIC,
  weight NUMERIC
  CHECK(weight >= 0)
  CHECK(weight <= 100),
  due_date DATE,
  section_id INT REFERENCES sections(id)
);

CREATE TABLE enrollment_assessments (
  id INT UNIQUE PRIMARY KEY REFERENCES enrollments(id),
  assignment_id REFERENCES assignments(id),
  assessment_type REFERENCES assessments(type),
  points NUMERIC
    CHECK (points >= 0)
    CHECK (points <-100),
);

然而，我收到错误：

[代码：，SQL状态：42601]错误：语法错误在或附近＆＃34;参考＆＃34;位置：112

这说错误是在第一行代码附近？我根本不理解这个错误。

Answer 1

我不喜欢这部分中的逗号：

CHECK (points >= 0)
CHECK (points <-100),

Answer 2

您错过了数据类型，并且必须删除额外的逗号：

 CREATE TABLE enrollment_assessments (
  id INT UNIQUE PRIMARY KEY REFERENCES enrollments(id),
  assignment_id INT REFERENCES assignments(id),
  assessment_type VARCHAR(10) REFERENCES assessments(type),
  points NUMERIC
    CHECK (points >= 0)
    CHECK (points <-100)
);

Postgres SQL语法错误靠近隐形＆＃39;参考＆＃39 ;?

2 个答案: