在一个查询中从两个表中删除而不加入

Question

I have two tables

@Entity
data class Pet(val name, val creationTime)

@Entity
data class Item(val creationTime)

These two entities are unrelated.

I would like to make a query that deletes from both tables by creationTime . How can I do this?

@Dao
interface Organizer {
    @Query("") 
    fun deleteAllTables(val creationTime)
}

Answer 1

As an option to all-in-one-query you can use two queries in one transaction ( documentation ).

I guess it would be logically the same as you want.

@Dao
interface Organizer {
    @Query("delete from pets where creationTime := creationTime") 
    fun deletePets(val creationTime)
    
    @Query("delete from items where creationTime := creationTime") 
    fun deleteItems(val creationTime)
    
    @Transaction
    fun deleteAllTables(val creationTime) { 
        deletePets(creationTime)
        deleteItems(creationTime)
    }
}