我有语法错误：意外的关键字 SET

Question

这是我的代码，但我不断收到错误消息语法错误：

在 [4:1] 设置了意外的关键字

SELECT start_station_id
FROM `cyclist-bike-share-success.Trip_data_2022_.April_2022`, 
UPDATE `cyclist-bike-share-success.Trip_data_2022_.April_2022`,
SET start_station_id='unknown',
WHERE start_station_id IS NULL

有什么建议吗？

Answer 1

尝试阅读有关如何编写查询的文档。

对于您的问题，请尝试像下面这样写：

SELECT start_station_id
FROM `cyclist-bike-share-success.Trip_data_2022_.April_2022`; 
UPDATE `cyclist-bike-share-success.Trip_data_2022_.April_2022`
SET start_station_id='unknown'
WHERE start_station_id IS NULL