create table role ( id bigserial primary key, name varchar(255), level int, create_time datetime, update_time datetime, is_del int default 0 ) KINGBASE8建表语句这么写有问题吗
时间: 2024-03-12 12:46:25 浏览: 17
根据我所了解的情况,KINGBASE8数据库支持大部分的标准 SQL 语法,但是并不是所有的 SQL 语法都被支持,因此需要根据具体的情况进行调整和修改。从您提供的 SQL 语句来看,其中的 `datetime` 数据类型可能不被 KINGBASE8 数据库所支持,建议将其修改为 `timestamp` 数据类型。同时,`is_del` 字段的数据类型可以修改为 `boolean` 类型,更为直观和易于使用。修改后的 SQL 语句如下:
```
create table role (
id bigserial primary key,
name varchar(255),
level int,
create_time timestamp,
update_time timestamp,
is_del boolean default false
);
```
注意,以上修改建议仅供参考,请根据具体情况进行适当的调整。
相关问题
用Java链接⃠ั 13:47:00 create database book_bar; use book_bar; create table reader( ID_card char(18), phone char(11), name varchar(6), primary key (ID_card,phone) ); create table VIP( ID_VIP char(8), categories varchar(10), discount double, amount double, primary key (ID_VIP) ); create table staff( ID_job char(8), phone char(11), name varchar(6), ID_card char(18), station varchar(6), salary double, state varchar(5), primary key (ID_job) ); create table book( book_number char(20), name varchar(20), book_kind varchar(10), book_location varchar(10), book_inventory int, book_price double, book_state varchar(5), book_purchase_time datetime, book_sale_time datetime, primary key (book_number) ); create table teaMenu( serial_number char(8), kind varchar(8), inventory int, listing_time datetime, off_shelf_time datetime, discount double, primary key (serial_number) ); ⃠ั 13:47:15 create database book_bar; use book_bar; create table reader( ID_card char(18), phone char(11), name varchar(6), primary key (ID_card,phone) ); create table VIP( ID_VIP char(8), categories varchar(10), discount double, amount double, primary key (ID_VIP) ); create table staff( ID_job char(8), phone char(11), name varchar(6), ID_card char(18), station varchar(6), salary double, state varchar(5), primary key (ID_job) ); create table book( book_number char(20), name varchar(20), book_kind varchar(10), book_location varchar(10), book_inventory int, book_price double, book_state varchar(5), book_purchase_time datetime, book_sale_time datetime, primary key (book_number) ); create table teaMenu( serial_number char(8), kind varchar(8), inventory int, listing_time datetime, off_shelf_time datetime, discount double, primary key (serial_number) );
以下是使用Java链接MySQL并执行上述SQL语句的示例代码:
```java
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.SQLException;
import java.sql.Statement;
public class MySQLConnector {
public static void main(String[] args) {
String url = "jdbc:mysql://localhost:3306/";
String dbName = "book_bar";
String driver = "com.mysql.jdbc.Driver";
String userName = "root";
String password = "yourpassword"; // 替换为你的MySQL密码
try {
Class.forName(driver).newInstance();
Connection conn = DriverManager.getConnection(url + dbName, userName, password);
Statement stmt = conn.createStatement();
String sql = "create table reader( ID_card char(18), phone char(11), name varchar(6), primary key (ID_card,phone) );";
stmt.executeUpdate(sql);
sql = "create table VIP( ID_VIP char(8), categories varchar(10), discount double, amount double, primary key (ID_VIP) );";
stmt.executeUpdate(sql);
sql = "create table staff( ID_job char(8), phone char(11), name varchar(6), ID_card char(18), station varchar(6), salary double, state varchar(5), primary key (ID_job) );";
stmt.executeUpdate(sql);
sql = "create table book( book_number char(20), name varchar(20), book_kind varchar(10), book_location varchar(10), book_inventory int, book_price double, book_state varchar(5), book_purchase_time datetime, book_sale_time datetime, primary key (book_number) );";
stmt.executeUpdate(sql);
sql = "create table teaMenu( serial_number char(8), kind varchar(8), inventory int, listing_time datetime, off_shelf_time datetime, discount double, primary key (serial_number) );";
stmt.executeUpdate(sql);
stmt.close();
conn.close();
} catch (SQLException e) {
e.printStackTrace();
} catch (Exception e) {
e.printStackTrace();
}
}
}
```
在代码中,我们使用了Java的JDBC API,通过连接MySQL数据库并执行SQL语句来创建数据库和表。需要注意的是,你需要替换代码中的`password`变量为你的MySQL密码。
-- 创建社团信息表 CREATE TABLE clubs ( club_id INT PRIMARY KEY, club_name VARCHAR(255) NOT NULL, admin_id INT, club_description VARCHAR(255), FOREIGN KEY (admin_id) REFERENCES admins(admin_id) ); -- 创建活动信息表 CREATE TABLE activities ( activity_id INT PRIMARY KEY, activity_name VARCHAR(255) NOT NULL, activity_time DATETIME, activity_description VARCHAR(255), club_id INT, FOREIGN KEY (club_id) REFERENCES clubs(club_id) ); -- 创建报名表 CREATE TABLE registrations ( registration_id INT PRIMARY KEY, activity_id INT, registration_time DATETIME, registration_status VARCHAR(20), participant_id INT, FOREIGN KEY (activity_id) REFERENCES activities(activity_id), FOREIGN KEY (participant_id) REFERENCES participants(participant_id) ); -- 创建参加活动人员信息表 CREATE TABLE participants ( participant_id INT PRIMARY KEY, participant_name VARCHAR(255) NOT NULL, participant_password VARCHAR(255), participant_address VARCHAR(255), participant_phone VARCHAR(20) ); -- 创建管理员信息表 CREATE TABLE admins ( admin_id INT PRIMARY KEY, admin_name VARCHAR(255) NOT NULL, admin_password VARCHAR(255), admin_phone VARCHAR(20), is_superadmin BOOLEAN );
您提供的SQL代码已经正确地创建了社团信息表(clubs)、活动信息表(activities)、报名表(registrations)、参加活动人员信息表(participants)和管理员信息表(admins)。这些表结构满足了3NF的要求,并且设置了适当的主键和外键关联。
请注意,在数据库中使用这些表之前,您可能还需要添加适当的约束和索引,以及根据具体需求进行表的优化和调整。此外,您可能还需要根据实际情况添加其他必要的表和关联。
如果您有其他关于这些表的需求或需要进一步的帮助,请随时告诉我。