Oracle 连接查询和sql语句中的条件判断-优快云博客

本文链接：https://blog.youkuaiyun.com/sunguoliang123/article/details/83725016

本文提供了一个SQL查询案例，用于检索处于特定迁移状态的记录。通过连接多个表来获取详细的迁移信息，并使用CASE语句处理迁移目标区域为空的情况。

摘要生成于 C知道，由 DeepSeek-R1 满血版支持，前往体验 >

SELECT 1 UPLOAD,
       0 SHENGJI,
       MR.BUSI_ID,
       MASTER.PERSON_ID,
       MASTER.ACNT_ID,
       MASTER.ID_NUM,
       MASTER.NAME,
       MASTER.SEX,
       MR.MIGRT_OUT_REGION,
       MR.OUT_OPERA_TIME,
       MR.OUT_OPERA_ID,
       MR.IN_OPERA_TIME,
       MR.MIGRATE_STATE,
       MR.MIGRT_IN_REGION,
       case
         when MR.MIGRT_IN_REGION is null then
          '未选择'
         else
          ARC.REGION_NAME
       end AS MIGRT_IN_REGION_NAME
FROM ADPM_MIGRATE_CPA MASTER, ADPM_MIGRATE_INFO MR
left join ADPM_REGION_CODE ARC on MR.MIGRT_IN_REGION = ARC.REGION_CODE
WHERE MASTER.PERSON_ID = MR.PERSON_ID
   AND (MR.MIGRATE_STATE = '10' OR MR.MIGRATE_STATE = '20' OR
       MR.MIGRATE_STATE = '60');

SELECT 1 UPLOAD,
       0 SHENGJI,
       MR.BUSI_ID,
       MASTER.PERSON_ID,
       MASTER.ACNT_ID,
       MASTER.ID_NUM,
       MASTER.NAME,
       MASTER.SEX,
       MR.MIGRT_OUT_REGION,
       MR.OUT_OPERA_TIME,
       MR.OUT_OPERA_ID,
       MR.IN_OPERA_TIME,
       MR.MIGRATE_STATE,
       MR.MIGRT_IN_REGION,
       case
         when MR.MIGRT_IN_REGION is null then
           '未选择'
         else
          ARC.REGION_NAME
       end AS MIGRT_IN_REGION_NAME
FROM ADPM_MIGRATE_CPA MASTER, ADPM_MIGRATE_INFO MR, ADPM_REGION_CODE ARC
WHERE MASTER.PERSON_ID = MR.PERSON_ID
   AND (MR.MIGRATE_STATE = '10' OR MR.MIGRATE_STATE = '20' OR
       MR.MIGRATE_STATE = '60')
   AND MR.MIGRT_IN_REGION = ARC.REGION_CODE(+);