php - CREATE TABLE 查询不起作用

Question

$con->query("CREATE TABLE jobs
(
ID INT AUTO_INCREMENT,
Title VARCHAR(32),
Company VARCHAR(32),
Country VARCHAR(32),
City VARCHAR(32),
Email VARCHAR(32),
Website VARCHAR(32),
Description VARCHAR(1000)
);");

有谁知道为什么它不起作用？

提前致谢

Answer 1

您只能将列定义AUTO_INCREMENT为PRIMARY KEY.

因此，只需将 a 添加PRIMARY KEY到AUTO INCREMENT列中，如下所示：

CREATE TABLE jobs
(
ID INT AUTO_INCREMENT,
Title VARCHAR(32),
Company VARCHAR(32),
Country VARCHAR(32),
City VARCHAR(32),
Email VARCHAR(32),
Website VARCHAR(32),
Description VARCHAR(1000),
PRIMARY KEY (ID)
);

Answer 2

Because there was no primary key defined,try this

CREATE TABLE jobs
(
    ID INT AUTO_INCREMENT PRIMARY KEY,
    Title VARCHAR(32),
    Company VARCHAR(32),
    Country VARCHAR(32),
    City VARCHAR(32),
    Email VARCHAR(32),
    Website VARCHAR(32),
    Description VARCHAR(1000)
);

Answer 3

Incorrect table definition; 
there can be only one auto column and it must be defined as a key

将主密钥添加到 ID

ID INT AUTO_INCREMENT PRIMARY KEY,

Answer 4

是的，我也没有收到任何错误

虽然你应该.

mysqli_report(MYSQLI_REPORT_ERROR | MYSQLI_REPORT_STRICT);

在您的代码中加入这一行，您将立即知道问题所在，并在不浪费社区力量的情况下解决它。