CREATE PROCEDURE find_available_rooms( IN checkin_time DATETIME, IN checkout_time DATETIME, IN room_type VARCHAR(50))BEGIN SELECT room_id, room_type, price FROM room WHERE room_id NOT IN ( SELECT room_id FROM orders WHERE checkin_time < checkout_time AND checkout_time > checkin_time ) AND room_type = room_type;END;这段代码在sql server 中运行应该怎么改

在 SQL Server 中，以下是修改后的代码：

CREATE PROCEDURE find_available_rooms
    @checkin_time DATETIME,
    @checkout_time DATETIME,
    @room_type VARCHAR(50)
AS
BEGIN
    SELECT room_id, room_type, price
    FROM room
    WHERE room_id NOT IN (
        SELECT room_id
        FROM orders
        WHERE checkin_time < @checkout_time AND checkout_time > @checkin_time
    ) AND room_type = @room_type;
END;

修改的主要部分是将输入参数的语法从 MySQL 的 `IN` 改为 SQL Server 的 `@` 符号，并且在查询中使用了 `@` 符号来引用它们。此外，查询语句本身没有变化，只是将 MySQL 的 `BEGIN` 和 `END` 块替换为 SQL Server 的 `AS` 语句块。

相关问题

检查一下SQL代码有没有错误，有的话标识出来并且改错：SET FOREIGN_KEY_CHECKS = 0; DROP TABLE IF EXISTS employee_info; CREATE TABLE employee_info ( e_id int(0) NOT NULL COMMENT '工作人员编号', e_name varchar(50) NOT NULL COMMENT '工作人员姓名', m_id int(0) NOT NULL COMMENT '管理员编号', PRIMARY KEY (e_id) USING BTREE, INDEX m_id(m_id) USING BTREE, CONSTRAINT m_id FOREIGN KEY (m_id) REFERENCES hotel_manager_info (m_id) ON DELETE CASCADE ON UPDATE CASCADE ) ; DROP TABLE IF EXISTS hotel_info; CREATE TABLE hotel_info ( h_id int(0) NOT NULL COMMENT '酒店序号', h_name varchar(25) NOT NULL COMMENT '酒店名称', h_address varchar(255) NOT NULL COMMENT '酒店地址', h_phone varchar(50) NOT NULL COMMENT '酒店电话', o_statistics int(0) NULL DEFAULT NULL COMMENT '统计订单量', PRIMARY KEY (h_id) USING BTREE ) ; DROP TABLE IF EXISTS hotel_manager_info; CREATE TABLE hotel_manager_info ( m_id int(0) NOT NULL COMMENT '管理员编号', m_name varchar(50) NOT NULL COMMENT '管理员姓名', h_id int(0) NULL DEFAULT NULL COMMENT '酒店序号', PRIMARY KEY (m_id) USING BTREE, INDEX hotel_id(h_id) USING BTREE, CONSTRAINT hotel_id FOREIGN KEY (h_id) REFERENCES hotel_info (h_id) ON DELETE CASCADE ON UPDATE CASCADE ) ; DROP TABLE IF EXISTS order_info; CREATE TABLE order_info ( o_id int(0) NOT NULL COMMENT '订单编号', r_id int(0) NOT NULL COMMENT '房间号', u_id int(0) NOT NULL COMMENT '用户id', o_checkin_time datetime(0) NULL DEFAULT NULL COMMENT '入住时间', o_checkout_time datetime(0) NOT NULL COMMENT '离开时间', o_status enum('not null',"null") NULL DEFAULT NULL COMMENT '为null 时表示未入住', PRIMARY KEY (o_id) USING BTREE, INDEX r_id(r_id) USING BTREE, INDEX u_id(u_id) USING BTREE, CONSTRAINT r_id FOREIGN KEY (r_id) REFERENCES room_info (r_id) ON DELETE CASCADE ON UPDATE CASCADE, CONSTRAINT u_id FOREIGN KEY (u_id) REFERENCES user_info (u_id) ON DELETE CASCADE ON UPDATE CASCADE ) ; DROP TABLE IF EXISTS room_info; CREATE TABLE room_info ( r_id int(0) NOT NULL COMMENT '房间号', r_name varchar(50) NOT NULL COMMENT '房间名称', r_type varchar(50) NOT NULL COMMENT '房间类型', r_price varchar(50) NULL DEFAULT NULL COMMENT '房间价格', h_id int(0) NOT NULL COMMENT '酒店序号', PRIMARY KEY (r_id) USING BTREE, INDEX h_id(h_id) USING BTREE, CONSTRAINT h_id FOREIGN KEY (h_id) REFERENCES hotel_info (h_id) ON DELETE CASCADE ON UPDATE CASCADE ) ; DROP TABLE IF EXISTS user_info; CREATE TABLE user_info ( u_id int(0) NOT NULL COMMENT '用户编号', u_name varchar(50) NOT NULL COMMENT '用户名', u_password varchar(50) NOT NULL COMMENT '密码', u_phone varchar(50) NULL DEFAULT NULL COMMENT '手机号码', u_email varchar(50) NULL DEFAULT NULL COMMENT '邮箱', u_register_time datetime(0) NULL DEFAULT NULL COMMENT '注册时间', PRIMARY KEY (u_id) USING BTREE ) ; SET FOREIGN_KEY_CHECKS = 1;

在以下语句中，'not null' 应该改为 'not_null'：

o_status enum('not_null',"null") NULL DEFAULT NULL COMMENT '为null 时表示未入住'

应该改为：

o_status enum('not_null','null') NULL DEFAULT NULL COMMENT '为null时表示未入住'

现存在数据库表语句信息：DROP TABLE IF EXISTS `order_info`; CREATE TABLE `order_info` ( `o_id` int(0) NOT NULL COMMENT '订单编号', `r_id` int(0) NOT NULL COMMENT '房间号', `u_id` int(0) NOT NULL COMMENT '用户id', `o_checkin_time` datetime(0) NULL DEFAULT NULL COMMENT '入住时间', `o_checkout_time` datetime(0) NOT NULL COMMENT '离开时间', `o_status` enum('not_null','null') NULL DEFAULT NULL COMMENT '为null 时表示未入住', PRIMARY KEY (`o_id`) USING BTREE, INDEX `r_id`(`r_id`) USING BTREE, INDEX `u_id`(`u_id`) USING BTREE, CONSTRAINT `r_id` FOREIGN KEY (`r_id`) REFERENCES `room_info` (`r_id`) ON DELETE CASCADE ON UPDATE CASCADE, CONSTRAINT `u_id` FOREIGN KEY (`u_id`) REFERENCES `user_info` (`u_id`) ON DELETE CASCADE ON UPDATE CASCADE ) ;和DROP TABLE IF EXISTS `hotel_info`; CREATE TABLE `hotel_info` ( `h_id` int(0) NOT NULL COMMENT '酒店序号', `h_name` varchar(25) NOT NULL COMMENT '酒店名称', `h_address` varchar(255) NOT NULL COMMENT '酒店地址', `h_phone` varchar(50) NOT NULL COMMENT '酒店电话', `o_statistics` int(0) NULL DEFAULT NULL COMMENT '统计订单量', PRIMARY KEY (`h_id`) USING BTREE ) ;现我需求：编写一段mysql代码 条件是 当order_info表中的字段h_id数据增加或者减少1时 且order_info表中的字段h_id = hotel_info表中的字段h_id， 则order_info表的o_statistics值也增加或减少1

可以使用MySQL的触发器实现这个需求。具体的代码如下：

CREATE TRIGGER `update_o_statistics` AFTER INSERT ON `order_info` FOR EACH ROW 
BEGIN
    IF (NEW.h_id IS NOT NULL) THEN
        UPDATE hotel_info SET o_statistics = o_statistics + 1 WHERE h_id = NEW.h_id;
    END IF;
END;

CREATE TRIGGER `delete_o_statistics` AFTER DELETE ON `order_info` FOR EACH ROW 
BEGIN
    IF (OLD.h_id IS NOT NULL) THEN
        UPDATE hotel_info SET o_statistics = o_statistics - 1 WHERE h_id = OLD.h_id;
    END IF;
END;

这个代码创建了两个触发器，一个用于在插入新订单时增加酒店订单量，一个用于在删除订单时减少酒店订单量。每次进行插入或删除操作时，MySQL会自动触发这些触发器，从而更新对应的酒店订单量。