如何在IN子句中传递变量

Question

我声明了变量i_unit_attempt_status，我想将该变量传递给'In子句'。您能帮我吗？

INNER JOIN student_unit_attempt sua
on sua.person_id=sei.person_id
   AND sua.course_cd=sei.course_cd
   AND sua.unit_cd=sei.unit_cd
   AND (sua.unit_attempt_status in (l_unit_attempt_status))

变量中的数据将是：选项1：“ COMPLETED”，“ DISCONTIN”，“ DUPLICATE”，“ ENROLLED”，“ INVALID”，“ UNCONFIRM”选项2：“ ENROLLED”

Answer 1

您可以像下面一样使用

 INNER JOIN student_unit_attempt sua
  on sua.person_id=sei.person_id
  AND sua.course_cd=sei.course_cd
  AND sua.unit_cd=sei.unit_cd
  AND sua.unit_attempt_status in
     (select column_value 
      from table(sys.dbms_debug_vc2coll(l_unit_attempt_status)));