데이터를 쿼리하는 동안 행을 열로 동적으로 변환하는 쿼리

Question

나는 대답을 Mysql query to dynamically convert rows to columns에 보았지만 모든 정보를 얻기 위해 테이블을 조인해야하기 때문에 작동하지 못했습니다. 여기에 나와있는 것처럼 '질문'을 열 이름으로 사용할 수있게 도와 주시겠습니까?

SELECT T.id, T.datestamp, SQ.question, 
     IF(type IN ("K", "N", "S", "T", "Y", "*") AND type NOT IN ("F"), 
     T.value, 
     IF(parent_qid = 0, SA.answer, SA2.answer) 
    ) as answer 
     FROM survey_questions SQ 
     JOIN survey_lookup SL ON SL.qid = SQ.qid 
     JOIN tmp T ON T.survey_col = SL.survey_col 
     LEFT JOIN survey_answers SA ON SA.qid = SQ.qid 
     AND SA.code = T.value 
     AND SA.language = 'en' 
     LEFT JOIN survey_answers SA2 on SA2.qid = SQ.parent_qid 
     AND SA2.code = T.value 
     AND SA2.language = 'en' 
     WHERE SQ.language = 'en' 
     ; 

제공 :

id datestamp  question       answer 
---------------------------------------------------------------- 
1 2/16/2017 11:55 Pay         Somewhat 
1 2/16/2017 11:55 Benefits (health plan, leave, etc.) Slightly 
1 2/16/2017 11:55 Career Advancement     Slightly 
1 2/16/2017 11:55 Access to Training     Somewhat 
1 2/16/2017 11:55 Leadership Style     Very 
1 2/16/2017 11:55 Manager/Supervisor Style   Somewhat 
1 2/16/2017 11:55 Please enter comments    The company's policies... 

이 코드는 때 모든 일이 코드를 사용하고

id datestamp  survey_col   value 
----------------------------------------------- 
1 2/16/2017 11:55 885457X234X1368SQ001 A3 
1 2/16/2017 11:55 885457X234X1368SQ002 A4 
1 2/16/2017 11:55 885457X234X1368SQ003 A4 
1 2/16/2017 11:55 885457X234X1368SQ004 A3 
1 2/16/2017 11:55 885457X234X1368SQ005 A2 
1 2/16/2017 11:55 885457X234X1368SQ006 A3 
1 2/16/2017 11:55 885457X234X1368SQ007 A4 
1 2/16/2017 11:55 885457X234X1368SQ008 A3 
1 2/16/2017 11:55 885457X234X1368SQ009 A4 
1 2/16/2017 11:55 885457X234X1368SQ010 A1 

: 같은

datestamp   pay  benefits ... career advancement 
--------------------------------------------------------------------- 
2/16/2017 11:55  Somewhat Slightyly  Slightly 
2/16/2017 11:55  Agree  Somewhat  Very 

는 데이터 보인다 데이터가 한 테이블에 있었고 se 조인.

SET @sql = NULL; 
    SET SESSION GROUP_CONCAT_MAX_LEN = 1000000; -- default is 1024 
    SELECT 
     GROUP_CONCAT(DISTINCT 
     CONCAT(
      'MAX(IF(question = ''', REPLACE(question,"'", "\\'"), ''', answer, NULL)) AS ''', REPLACE(question,"'", "\\'"), '''' 
     ) 
    ) INTO @sql 
     FROM tmp; 

     SET @sql = CONCAT('SELECT row_id, submitdate, ', @sql, ' FROM ', survey_report, ' GROUP BY row_id'); 

     IF DEBUG = 1 THEN 
     SELECT @sql; 
     END IF; 

     PREPARE stmt FROM @sql; 
     EXECUTE stmt; 
     DEALLOCATE PREPARE stmt; 

이것은 REPLACE 기능이없는 시도였습니다 (사용하고 싶습니다).

SELECT 
    GROUP_CONCAT(DISTINCT 
    CONCAT(
    'MAX(IF(SQ.question = ', '''SQ.question''',' 
     IF(type IN ("K", "N", "S", "T", "Y", "*") AND type NOT IN ("F"), 
     T.value, 
     IF(parent_qid = 0, SA.answer, SA2.answer) 
    ) as answer, NULL)) as answer', '''SQ.question''') 
) INTO @sql 
    FROM survey_questions SQ 
    JOIN survey_lookup SL ON SL.qid = SQ.qid 
    JOIN tmp T ON T.survey_col = SL.survey_col 
    LEFT JOIN survey_answers SA ON SA.qid = SQ.qid 
    AND SA.code = T.value 
    AND SA.language = 'en' 
    LEFT JOIN survey_answers SA2 on SA2.qid = SQ.parent_qid 
    AND SA2.code = T.value 
    AND SA2.language = 'en' 
    WHERE SQ.language = 'en'; 

    SET @sql = CONCAT('SELECT id, datestamp, ', @sql, ' FROM tmp GROUP BY id'); 

    SELECT @sql; 

    PREPARE stmt FROM @sql; 
    EXECUTE stmt; 
    DEALLOCATE PREPARE stmt; 

Answer 1

이 작업은했으나 다른 테이블을 만들고 싶지 않았습니다.

DROP TEMPORARY TABLE IF EXISTS `tmp2`; 
CREATE TEMPORARY TABLE tmp2 
    SELECT T.id, T.datestamp, SQ.question, 
     IF(type IN ("K", "N", "S", "T", "Y", "*") AND type NOT IN ("F"), 
     T.value, 
     IF(parent_qid = 0, SA.answer, SA2.answer) 
    ) as answer 
     FROM survey_questions SQ 
     JOIN survey_lookup SL ON SL.qid = SQ.qid 
     JOIN tmp T ON T.survey_col = SL.survey_col 
     LEFT JOIN survey_answers SA ON SA.qid = SQ.qid 
     AND SA.code = T.value 
     AND SA.language = 'en' 
     LEFT JOIN survey_answers SA2 on SA2.qid = SQ.parent_qid 
     AND SA2.code = T.value 
     AND SA2.language = 'en' 
     WHERE SQ.language = 'en' 
     ; 

- select * from tmp2;

  SET @sql = NULL; 
    SET SESSION GROUP_CONCAT_MAX_LEN = 1000000; -- default is 1024 
    SELECT 
     GROUP_CONCAT(DISTINCT 
     CONCAT(
      'MAX(IF(question = ''', REPLACE(question,"'", "\\'"), ''', answer, NULL)) AS ''', REPLACE(question,"'", "\\'"), '''' 
     ) 
    ) INTO @sql 
     FROM tmp2; 
     SET @sql = CONCAT('SELECT id, datestamp, ', @sql, ' FROM tmp2 GROUP BY id'); 

     SELECT @sql; 

     PREPARE stmt FROM @sql; 
     EXECUTE stmt; 
     DEALLOCATE PREPARE stmt;