sql - hive 查询 : Ambiguous column reference acct_nbr in stage

Question

我收到“不明确的列引用”

查询:

SELECT stage.acct_nbr 
FROM   (SELECT * 
        FROM   mem stage 
               JOIN (SELECT acct_nbr, 
                            corp_ent_cd, 
                            sub_seq_nbr, 
                            mem_nbr, 
                            Max(cdc_src_last_updt_ts) AS cdc_src_last_updt_ts 
                     FROM   mem 
                     WHERE  file_nm = 'DLTV.FULL.MES3191.D180423' 
                     GROUP  BY acct_nbr, 
                               corp_ent_cd, 
                               sub_seq_nbr, 
                               mem_nbr) c 
                 ON c.corp_ent_cd = stage.corp_ent_cd 
                    AND c.acct_nbr = stage.acct_nbr 
                    AND c.sub_seq_nbr = stage.sub_seq_nbr 
                    AND c.mem_nbr = stage.mem_nbr 
                    AND stage.cdc_src_last_updt_ts = c.cdc_src_last_updt_ts 
        WHERE  stage.file_nm = 'DLTV.FULL.MES3191.D180423') stage; 

错误信息:

Error: Error while compiling statement: FAILED: SemanticException [Error 10007]: Ambiguous column reference acct_nbr in stage (state=42000,code=10007)

而如果我选择 * 而不是 select stage.acct_nbr，它会正确执行。

有人可以解决我的问题吗？

Answer 1

问题出在 SELECT * 上。

子查询 c.acct_nbr ,stage.acct_nbr 有两列，所以外层 SELECT 不能 stage.acct_nbr 区分要获取的列。

因此您可以在select 子查询中选择c.acct_nbr 或stage.acct_nbr

你可以试试这个。

SELECT stage.acct_nbr 
FROM   (SELECT c.acct_nbr 
        FROM   mem stage 
               JOIN (SELECT acct_nbr, 
                            corp_ent_cd, 
                            sub_seq_nbr, 
                            mem_nbr, 
                            Max(cdc_src_last_updt_ts) AS cdc_src_last_updt_ts 
                     FROM   mem 
                     WHERE  file_nm = 'DLTV.FULL.MES3191.D180423' 
                     GROUP  BY acct_nbr, 
                               corp_ent_cd, 
                               sub_seq_nbr, 
                               mem_nbr) c 
                 ON c.corp_ent_cd = stage.corp_ent_cd 
                    AND c.acct_nbr = stage.acct_nbr 
                    AND c.sub_seq_nbr = stage.sub_seq_nbr 
                    AND c.mem_nbr = stage.mem_nbr 
                    AND stage.cdc_src_last_updt_ts = c.cdc_src_last_updt_ts 
        WHERE  stage.file_nm = 'DLTV.FULL.MES3191.D180423') stage;