MySQL - 使用一个查询增加多行的值

Question

是否可以通过一次查询更新和增加多行的值？

我有下表服务:

id | name | count | created_at | updated_at

每次用户在搜索中选择某些服务时，我都想更新计数(这是通过 GUI 完成的，用户可以选择一项或多项服务，我正在获取服务的 ID)。

当选择了多个服务时，我可以对每个服务执行单个查询，但这似乎不是很有效。

例子:

我需要一次更新 7 个服务并增加每个服务的计数值:

UPDATE services SET count = count + 1 WHERE id = 28

UPDATE services SET count = count + 1 WHERE id = 29

UPDATE services SET count = count + 1 WHERE id = 39

UPDATE services SET count = count + 1 WHERE id = 44

UPDATE services SET count = count + 1 WHERE id = 296

UPDATE services SET count = count + 1 WHERE id = 294

UPDATE services SET count = count + 1 WHERE id = 111

是否可以在一次查询中执行此更新？

Answer 1

i need to update 7 services at once and increment the count value for each of them:

UPDATE services SET count = count + 1 WHERE id = 28

UPDATE services SET count = count + 1 WHERE id = 29

UPDATE services SET count = count + 1 WHERE id = 39

UPDATE services SET count = count + 1 WHERE id = 44

UPDATE services SET count = count + 1 WHERE id = 296

UPDATE services SET count = count + 1 WHERE id = 294

UPDATE services SET count = count + 1 WHERE id = 111

Is it possible to perform this update in one query?

可以重写为一个查询。

查询

UPDATE 
 services 
SET 
 count = count + 1 
WHERE
 id IN(28, 29, 39, 44, 296, 294, 111)