JOOQ：select 其他表中不存在 ID 的所有表條目

Question

問題：如何創建對select所有Subscription條目的 JOOQ 查詢， where ActiveSubscribers.subscriptionId不在Subscriptions表中

+-------------------+   +----------------------+
|  Subscriptions    |   |  ActiveSubscribers   |
+-------------------+   +----------------------+
| Id   |    Name    |   | Id   | SubcriptionId |
|-------------------|   |----------------------|
| 1    |  Dogs      |   | 1    |   1           |
| 2    |  Cats      |   | 2    |   2           |
| 3    |  Hamsters  |   +----------------------+
+-------------------+

預期結果：

+-------------------+
| 3    |  Hamsters  |
+-------------------+

我試過的：

List<Subscription> nonActiveSubscriptions = DSL.using(connection)
.select()
.from(DSL.table("Subscribers"))
.where(DSL.field("Id").notIn(
  DSL.select(DSL.field("ActiveSubscribers.subscriptionId")).from(DSL.table("Subscribers"))
)
.fetch()
.into(Subscription.class);

Answer 1

您的子選擇的 from 子句是錯誤的。 應該是：ActiveSubscribers

List<Subscription> nonActiveSubscriptions = DSL.using(connection)
.select()
.from(DSL.table("Subscribers"))
.where(DSL.field("Id").notIn(
  DSL.select(DSL.field("ActiveSubscribers.subscriptionId"))
     .from(DSL.table("ActiveSubscribers"))
)
.fetch()
.into(Subscription.class);