Sqlite-JDBC 创建表语法错误答案

【问题标题】：Sqlite-JDBC create table syntax errorSqlite-JDBC 创建表语法错误
【发布时间】：2013-08-30 04:38:08
【问题描述】：

我正在尝试使用 Java 在我的 sqlite 数据库中创建表。但在最后一个表 ORDER 上不断出现语法错误 >_

...我不确定我做错了什么，谁能检查并告诉我我的错误吗？

代码如下：

public boolean CreateTables() {
    Connection cn = getConnected();
    String createCategory = "Create table Category("
            + "id text primary key not null,"
            + "name text not null,"
            + "deliverday int not null,"
            + "isdelete bit not null"
            + ")";

    String createCustomer = "Create table Customer("
            + "id text primary key not null,"
            + "name text not null,"
            + "email text not null,"
            + "phone text not null,"
            + "address text not null,"
            + "isdelete boolean not null"
            + ")";

    String createOrder = "Create table Order("
            + "id text primary key not null,"
            + "custid text references Category(id) no null,"
            + "catid text references Customer(id) not null,"
            + "orderdate date not null,"
            + "delieverdate date not null,"
            + "description text not null,"
            + "requirement text not null,"
            + "price int not null,"
            + "image text not null,"
            + "product text not null,"
            + "state text not null,"
            + ")";
    try {
        PreparedStatement pst;
        try {
            System.out.println("*** Create table Category");

            pst = cn.prepareStatement(createCategory);
            pst.executeUpdate();
            pst.close();

            System.out.println("*** Category created Successfully");
        } catch (Exception e) {
            System.out.println("*** Failed to create Category");
            System.out.println(e.getMessage());
        }

        try {
            System.out.println("*** Create table Customer");

            pst = cn.prepareStatement(createCustomer);
            pst.executeUpdate();
            pst.close();

            System.out.println("*** Customer created Successfully");
        } catch (Exception e) {
            System.out.println("*** Failed to create Customer");
            System.out.println(e.getMessage());
        }


        try {
            System.out.println("*** Create table Order");

            pst = cn.prepareStatement(createOrder);
            pst.executeUpdate();
            pst.close();

            System.out.println("*** Order created successsfully");
        } catch (Exception e) {
            System.out.println("*** Failed to create Order");
            System.out.println(e.getMessage());
        }

        System.out.println("*** COMPLETE CREATING TABLE PROCESS ****");


        cn.close();
        return true;
    } catch (Exception e) {
        e.printStackTrace();
    }
    return false;
}

这是错误。

*** Start to connection Sqlite
*** Connected to Sqlite successfully
*** Create table Category
*** Category created Successfully
*** Create table Customer
*** Customer created Successfully
*** Create table Order
*** Failed to create Order
[SQLITE_ERROR] SQL error or missing database (near "Order": syntax error)
*** COMPLETE CREATING TABLE PROCESS ****

【问题讨论】：

标签： java sql sqlite jdbc

【解决方案1】：

订单是sqllite reserved workd/keyword。我建议将表名从 Order 更改为 Orders 或类似的名称并尝试。

【讨论】：

@zBaoAnhLe：不客气。祝你好运！如果回答对你有帮助，别忘了接受。

【解决方案2】：

你这里有一个错字：

+ "custid text references Category(id) no null,"

应该是

+ "custid text references Category(id) not null,"

【讨论】：

【解决方案3】：

您正在使用保留关键字，而且您忘记在查询中提及 foreign 关键字。应该是这样的：

String createOrder = "Create table Cus_Order("
        + "id text primary key not null,"
        + "custid text FOREIGN KEY references Category(id) not null,"
        + "catid text FOREIGN KEY references Customer(id) not null,"
        + "orderdate date not null,"
        + "delieverdate date not null,"
        + "description text not null,"
        + "requirement text not null,"
        + "price int not null,"
        + "image text not null,"
        + "product text not null,"
        + "state text not null,"
        + ")";

【讨论】：

【解决方案4】：

我修正了我所有的小错误，结果是这样的：

在我修复之前

String createOrder = "Create table Order("
        + "id text primary key not null,"
        + "custid text references Category(id) no null,"
        + "catid text references Customer(id) not null,"
        + "orderdate date not null,"
        + "delieverdate date not null,"
        + "description text not null,"
        + "requirement text not null,"
        + "price int not null,"
        + "image text not null,"
        + "product text not null,"
        + "state text not null,"
        + ")";

修复后：

String createOrder = "Create table Orders("
    + "id text primary key not null,"
    + "custid text references Category(id),"
    + "catid text FOREIGN KEY references Customer(id),"
    + "orderdate date not null,"
    + "delieverdate date not null,"
    + "description text not null,"
    + "requirement text not null,"
    + "price int not null,"
    + "image text not null,"
    + "product text not null,"
    + "state text not null"
    + ")";

【讨论】：

你忘了修正第二列custid。

【解决方案5】：

在您的 String createOrder 中有两个错误：

1.

你使用了“no null”而不是“not null”

+"custid text references Category(id) no null,"

改正为

+"custid text references Category(id) not null,"

2.

最后一个字段后面不需要逗号，这里你在最后一个字段后面使用逗号。

+ "state text not null,"

去掉逗号

+ "state text not null"

【讨论】：