postgresql return table ERROR : 열 참조가 모호합니다.

Question

두 개의 서로 다른 하위 색인 사이에 공유 된 주석 작성자를 확인하기 위해 R에서 쿼리를 실행하려고합니다. 그러나 계속해서 다음 오류가 발생합니다.

Warning: Error in postgresqlExecStatement: RS-DBI driver: (could not Retrieve the result : ERROR: column reference "subreddit" is ambiguous )

내가 잘못 가고있는 아이디어가 있습니까?

query <- sprintf(" 
SELECT final.subreddit_a, final.subreddit_b 
FROM 
    (SELECT a.subreddit AS subreddit_a, 
      a.authors AS authors_in_sub_a, 
      b.subreddit AS subreddit_b, 
      b.authors AS authors_in_sub_b, 
      floor(100 * (count(*)/((a.authors + b.authors)/2))) AS percentage 
    FROM 
    (SELECT t1.author AS author, 
      t1.subreddit AS subreddit, 
      t2.authors AS authors 
    FROM 
     (SELECT DISTINCT author, subreddit 
     FROM %s 
     WHERE %s author!='[deleted]') AS t1 
     JOIN 
     (SELECT * 
     FROM 
      (SELECT subreddit, count(distinct author) AS authors 
      FROM %s 
      WHERE %s author!='[deleted]' GROUP BY subreddit) AS t5 
      WHERE authors >= %s) AS t2 
     ON t1.subreddit=t2.subreddit 
     GROUP BY subreddit, author) AS a 
    JOIN 
     (SELECT t3.author AS author, 
       t3.subreddit AS subreddit, 
       t4.authors AS authors 
     FROM 
     (SELECT DISTINCT author, subreddit 
     FROM %s 
     WHERE %s author!='[deleted]') AS t3 
     JOIN 
      (SELECT * 
      FROM 
      (SELECT subreddit, count(distinct author) AS authors 
      FROM %s 
      WHERE %s author!='[deleted]' GROUP BY subreddit) AS t6 
      WHERE authors >= %s) AS t4 
     ON t3.subreddit=t4.subreddit 
     GROUP BY subreddit, author) AS b 
     ON a.author=b.author 
    WHERE a.subreddit!=b.subreddit GROUP BY 1,3) AS final 
    WHERE final.percentage > %s;" 

Answer 1

쓰기 대신 subreddit의 table_name.subreddit.

Answer 2

당신은