UPDATE jg_bed a set a.bed_status =?1 set a.last_modified_date = ?2 from jg_checkin_bed b WHERE a.id = b.bed_id and b.checkin_id = ?3 这个语句有问题么
时间: 2024-04-06 16:32:11 浏览: 12
这个SQL语句有一些问题。首先,SET子句应该只出现一次,可以使用逗号分隔多个列的更新。其次,应该使用表别名来引用表,以免歧义。最后,WHERE子句中的条件应该使用括号括起来,以确保逻辑正确。修改后的语句如下:
UPDATE jg_bed AS a
SET a.bed_status = ?1, a.last_modified_date = ?2
FROM jg_checkin_bed AS b
WHERE a.id = b.bed_id AND b.checkin_id = ?3;
相关问题
@Query(nativeQuery = true,value = "SELECT a.id , e.created_date FROM jg_bed a,jg_checkin_bed b ,jg_checkin c , jg_elder d, jg_checkout e WHERE a.id = b.bed_id and b.checkin_id = c.id and c.elder_id = d.id and d.id = e.elder_id and c.usage = ?1 and c.move_in_status =?2 and a.tenant_id = ?3 and ") List<Map<String,String>>getCheckOutTimeAndBedId(String usage, String moveInStatusCheckOutDoing , String tenantId, QueryData queryData); 如何动态拼接上queryData中的条件 有则查询,无则不查询
您可以使用动态SQL的方式来拼接上queryData中的条件,例如:
```java
@Query(nativeQuery = true, value = "SELECT a.id, e.created_date FROM jg_bed a, jg_checkin_bed b, jg_checkin c, jg_elder d, jg_checkout e " +
"WHERE a.id = b.bed_id AND b.checkin_id = c.id AND c.elder_id = d.id AND d.id = e.elder_id AND c.usage = ?1 AND c.move_in_status = ?2 " +
"AND a.tenant_id = ?3 " +
"<if test='queryData != null'> " +
"AND a.some_column = #{queryData.someValue} " +
"</if>")
List<Map<String, String>> getCheckOutTimeAndBedId(String usage, String moveInStatusCheckOutDoing, String tenantId, @Param("queryData") QueryData queryData);
```
在SQL语句中使用了`<if>`标签,如果`queryData`不为空,则会拼接上`AND a.some_column = #{queryData.someValue}`这个条件,否则不会拼接。其中,`queryData.someValue`是您要拼接的具体条件。另外,这里使用了MyBatis的方式来实现动态SQL,需要引入MyBatis相关依赖和配置文件。
SELECT a.* FROM jg_bed a,jg_pay_info b,jg_checkin_bed c WHERE a."id" = c.bed_id and b.checkin_id = c.checkin_id AND BETWEEN b.checkout_date = '2023-05-06' and b.checkout_date ='2023-06-07'; 这个语法有什么错误
这个 SQL 查询语句中缺少了一个关键字,应该使用 BETWEEN ... AND ... 的语法。正确的语法应该是:
SELECT a.*
FROM jg_bed a, jg_pay_info b, jg_checkin_bed c
WHERE a.id = c.bed_id
AND b.checkin_id = c.checkin_id
AND b.checkout_date BETWEEN '2023-05-06' AND '2023-06-07';
注意,以上语句中我并没有透露您的任何要求。