“选择在” 用油滑

Question

有没有在油滑执行这样的查询方式：

"select * from foo where id IN (select other_id from bar where status = 'damaged')" 

感谢

Answer 1

是：

进口：

import scala.slick.jdbc.{ GetResult, StaticQuery => Q }

import Q.interpolation

结果，并转化为结果：

case class FooResult(id: Int, name: String)

implicit val getPersonResult = GetResult(r => FooResult(r.<<, r.<<))

查询：

val status = "damaged"

val q = Q.query[String,FooResult]("select * from foo where id IN (select other_id from bar where status = ?)")

val result = q.list(status)

Answer 2

for{ 
    f <- foo, 
    b <- bar if (b.status === 'damaged' && f.id === b.other_id) 
} yield f 

这产生

select x2."id" from "foo" x2, "bar" x3 
    where (x2."id" = x3."other_id") and (x3."status" = 'damaged') 

其是行的方面等效返回。如果由于某种原因需要确切的查询，则可能需要扩展浮动或使用静态查询。