sqlserver 根据实体类public class ReportMenu { /报表id/ private Integer id; /报表分组/ private String reportGroup; /报表名称/ private String reportName; /报表路径/ private String reportUrl; public Integer getId() { return id; } public void setId(Integer id) { this.id = id; } public String getReportGroup() { return reportGroup; } public void setReportGroup(String reportGroup) { this.reportGroup = reportGroup; } public String getReportName() { return reportName; } public void setReportName(String reportName) { this.reportName = reportName; } public String getReportUrl() { return reportUrl; } public void setReportUrl(String reportUrl) { this.reportUrl = reportUrl; } }构建建表sql,要求驼峰命名改下划线,并添加字段备注
时间: 2024-01-09 18:04:22 浏览: 120
根据上述实体类,建表 SQL 如下所示:
```
CREATE TABLE report_menu (
id INT NOT NULL COMMENT '报表id',
report_group VARCHAR(50) NOT NULL COMMENT '报表分组',
report_name VARCHAR(50) NOT NULL COMMENT '报表名称',
report_url VARCHAR(100) NOT NULL COMMENT '报表路径',
PRIMARY KEY (id)
);
```
在建表 SQL 中,将实体类中的驼峰命名改为了下划线命名,并添加了每个字段的注释说明。注意,主键的约束也需要在 SQL 中体现,这里使用了 `PRIMARY KEY` 关键字来声明 id 字段为主键。
相关问题
sqlserver 根据实体类public class ReportMenu { /*报表id*/ private Integer id; /*报表分组*/ private String reportGroup; /*报表名称*/ private String reportName; /*报表路径*/ private String reportUrl; public Integer getId() { return id; } public void setId(Integer id) { this.id = id; } public String getReportGroup() { return reportGroup; } public void setReportGroup(String reportGroup) { this.reportGroup = reportGroup; } public String getReportName() { return reportName; } public void setReportName(String reportName) { this.reportName = reportName; } public String getReportUrl() { return reportUrl; } public void setReportUrl(String reportUrl) { this.reportUrl = reportUrl; } }构建建表sql
根据这个实体类,可以建立以下的建表sql:
```
CREATE TABLE [dbo].[ReportMenu](
[id] [int] NOT NULL,
[reportGroup] [nvarchar](50) NULL,
[reportName] [nvarchar](50) NULL,
[reportUrl] [nvarchar](100) NULL,
CONSTRAINT [PK_ReportMenu] PRIMARY KEY CLUSTERED
(
[id] ASC
)WITH (PAD_INDEX = OFF, STATISTICS_NORECOMPUTE = OFF, IGNORE_DUP_KEY = OFF, ALLOW_ROW_LOCKS = ON, ALLOW_PAGE_LOCKS = ON) ON [PRIMARY]
) ON [PRIMARY]
```
其中,id为主键,reportGroup、reportName、reportUrl为普通字段,数据类型分别为nvarchar和int,长度根据实际需求进行调整。
在Spring Boot框架下的web评论系统,实体类有评论、子评论、用户和回复,给出SQLServer数据库表的设计及其代码和实体类代码
SQLServer数据库表设计:
评论表(comment):
| 字段 | 类型 | 主键 | 自增 | 允许为空 |
| -------------- | -------------- | ---- | ---- | -------- |
| comment_id | int | 是 | 是 | 否 |
| user_id | int | | | 否 |
| content | varchar(MAX) | | | 否 |
| create_time | datetime | | | 否 |
| parent_id | int | | | 是 |
子评论表(sub_comment):
| 字段 | 类型 | 主键 | 自增 | 允许为空 |
| -------------- | -------------- | ---- | ---- | -------- |
| sub_comment_id | int | 是 | 是 | 否 |
| user_id | int | | | 否 |
| content | varchar(MAX) | | | 否 |
| create_time | datetime | | | 否 |
| parent_id | int | | | 否 |
| reply_to_id | int | | | 否 |
用户表(user):
| 字段 | 类型 | 主键 | 自增 | 允许为空 |
| ---------- | ------------ | ---- | ---- | -------- |
| user_id | int | 是 | 是 | 否 |
| username | varchar(50) | | | 否 |
| password | varchar(255) | | | 否 |
回复表(reply):
| 字段 | 类型 | 主键 | 自增 | 允许为空 |
| ---------- | ------------ | ---- | ---- | -------- |
| reply_id | int | 是 | 是 | 否 |
| user_id | int | | | 否 |
| content | varchar(MAX) | | | 否 |
| create_time| datetime | | | 否 |
| parent_id | int | | | 否 |
| to_user_id | int | | | 否 |
代码如下:
评论表(Comment):
```java
@Entity
@Table(name = "comment")
public class Comment {
@Id
@GeneratedValue(strategy = GenerationType.IDENTITY)
private Integer commentId;
@ManyToOne(cascade = CascadeType.ALL)
@JoinColumn(name = "user_id", referencedColumnName = "user_id")
private User user;
private String content;
@Temporal(TemporalType.TIMESTAMP)
private Date createTime;
private Integer parentId;
// getter、setter方法
}
```
子评论表(SubComment):
```java
@Entity
@Table(name = "sub_comment")
public class SubComment {
@Id
@GeneratedValue(strategy = GenerationType.IDENTITY)
private Integer subCommentId;
@ManyToOne(cascade = CascadeType.ALL)
@JoinColumn(name = "user_id", referencedColumnName = "user_id")
private User user;
private String content;
@Temporal(TemporalType.TIMESTAMP)
private Date createTime;
private Integer parentId;
@ManyToOne(cascade = CascadeType.ALL)
@JoinColumn(name = "reply_to_id", referencedColumnName = "sub_comment_id")
private SubComment replyTo;
// getter、setter方法
}
```
用户表(User):
```java
@Entity
@Table(name = "user")
public class User {
@Id
@GeneratedValue(strategy = GenerationType.IDENTITY)
private Integer userId;
private String username;
private String password;
// getter、setter方法
}
```
回复表(Reply):
```java
@Entity
@Table(name = "reply")
public class Reply {
@Id
@GeneratedValue(strategy = GenerationType.IDENTITY)
private Integer replyId;
@ManyToOne(cascade = CascadeType.ALL)
@JoinColumn(name = "user_id", referencedColumnName = "user_id")
private User user;
private String content;
@Temporal(TemporalType.TIMESTAMP)
private Date createTime;
private Integer parentId;
@ManyToOne(cascade = CascadeType.ALL)
@JoinColumn(name = "to_user_id", referencedColumnName = "user_id")
private User toUser;
// getter、setter方法
}
```
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