TeraData查询从表中获取最小值和最大值

Question

我有一个名为HMS_PGHL8_HQID_MAP_DEMO的表和名为UDMTOOL_STG的数据库。

以下查询会提取我所需的值。

SELECT udm_main.RECORD_ID AS  record_id ,udm_main.HMS_PGH_NODE_ID AS  hms_pgh_node_id, 
       udm_main.HMS_PGH_NODE_NAME AS hms_pgh_node_name ,udm_main.HQ_NODE_ID AS hq_node_id, udm_main.HQ_NODE_NAME AS hq_node_name,
       udm_main.NODE_TYPE_IND as node_type_ind,UPDATED_ON,UPDATED_BY,
       INSERT_TS  FROM UDMTOOL_STG.HMS_PGHL8_HQID_MAP_DEMO udm_main
WHERE op_code <> 'D' OR op_code IS NULL
ORDER BY RECORD_ID,HMS_PGH_NODE_ID,HQ_NODE_ID
GROUP BY 1,2,3,4,5,6,7,8,9;

现在我需要得到总行值：

1. 记录ID为分钟
2. 记录ID为最大

请注意，下面不起作用，

SELECT MIN(udm_main.RECORD_ID AS)  record_id ,udm_main.HMS_PGH_NODE_ID AS  hms_pgh_node_id, 
           udm_main.HMS_PGH_NODE_NAME AS hms_pgh_node_name ,udm_main.HQ_NODE_ID AS hq_node_id, udm_main.HQ_NODE_NAME AS hq_node_name,
           udm_main.NODE_TYPE_IND as node_type_ind,UPDATED_ON,UPDATED_BY,
           INSERT_TS  FROM UDMTOOL_STG.HMS_PGHL8_HQID_MAP_DEMO udm_main
    WHERE op_code <> 'D' OR op_code IS NULL
    ORDER BY RECORD_ID,HMS_PGH_NODE_ID,HQ_NODE_ID
    GROUP BY 1,2,3,4,5,6,7,8,9;

请求您的帮助以解决问题。

Answer 1

您可以使用QUALIFY过滤MIN / MAX：

SELECT udm_main.RECORD_ID,udm_main.HMS_PGH_NODE_ID AS  hms_pgh_node_id, 
       udm_main.HMS_PGH_NODE_NAME AS hms_pgh_node_name,udm_main.HQ_NODE_ID AS hq_node_id, udm_main.HQ_NODE_NAME AS hq_node_name,
       udm_main.NODE_TYPE_IND as node_type_ind,UPDATED_ON,UPDATED_BY,
       INSERT_TS
FROM UDMTOOL_STG.HMS_PGHL8_HQID_MAP_DEMO udm_main
WHERE op_code <> 'D' OR op_code IS NULL
GROUP BY 1,2,3,4,5,6,7,8,9
QUALIFY udm_main.RECORD_ID = MIN(udm_main.RECORD_ID) OVER ()
     OR udm_main.RECORD_ID = MAX(udm_main.RECORD_ID) OVER ()
ORDER BY RECORD_ID