0

有很多关于在 MySQL 数据库表中以逗号分隔的方式保存基于字符串的结果的讨论。我不想在这里用我自己的哲学评论来扩展这一点，我只想首先说这个问题对我来说是众所周知的，但现在不是正确的话题。

题目是我有这样的情况要评价。数据保存为基于字符串的密码。这些密码中的每一个都表示进行了特定类型的手术后的医疗并发症。

例子：

MySQL 数据库表“并发症”包含一个名为“手术修订指示”(VARCHAR[50]) 的字段，其中保存了诸如“3、7、9、16”之类的数据条目，因为从多选菜单中可以看到这 4 个不同的指示由用户选择。

现在我想做以下事情：

我知道“3”、“7”、“9”和“16”代表什么。我想使用 MySQL SELECT 查询将这些密码重新显示为它们的原始概念（例如“体重恢复”、“减肥失败”等），例如：

SELECT blah blah blah (a lot of other stuff),

CONCAT_WS(", "
                 , COALESCE(CASE WHEN op.OP2RevisionIndikation LIKE "%1%" THEN "Innere Hernie (Meso)  " ELSE CONCAT("", "") END, "NULL")
                 , COALESCE(CASE WHEN op.OP2RevisionIndikation LIKE "%2%" THEN "Innere Hernie (PETERSEN)  " ELSE CONCAT("", "") END, "NULL")
                 , COALESCE(CASE WHEN op.OP2RevisionIndikation LIKE "%3%" THEN "Weight Regain  " ELSE CONCAT("", "") END, "NULL")
                 , COALESCE(CASE WHEN op.OP2RevisionIndikation LIKE "%4%" THEN "Weight Loss Failure  " ELSE CONCAT("", "") END, "NULL")
                 , COALESCE(CASE WHEN op.OP2RevisionIndikation LIKE "%5%" THEN "Anastomosenstenose  " ELSE CONCAT("", "") END, "NULL")
                 , COALESCE(CASE WHEN op.OP2RevisionIndikation LIKE "%6%" THEN "Dysphagie  " ELSE CONCAT("", "") END, "NULL")
                 , COALESCE(CASE WHEN op.OP2RevisionIndikation LIKE "%7%" THEN "Reflux  " ELSE CONCAT("", "") END, "NULL")
                 , COALESCE(CASE WHEN op.OP2RevisionIndikation LIKE "%8%" THEN "Gallenreflux  " ELSE CONCAT("", "") END, "NULL")
                 , COALESCE(CASE WHEN op.OP2RevisionIndikation LIKE "%9%" THEN "Malnutrition  " ELSE CONCAT("", "") END, "NULL")
                 , COALESCE(CASE WHEN op.OP2RevisionIndikation LIKE "%10%" THEN "Diarrhö  " ELSE CONCAT("", "") END, "NULL")
                 , COALESCE(CASE WHEN op.OP2RevisionIndikation LIKE "%11%" THEN "Gastrogastrale Fistel" ELSE CONCAT("", "") END, "NULL")
                 , COALESCE(CASE WHEN op.OP2RevisionIndikation LIKE "%12%" THEN "Ulcusperforation  " ELSE CONCAT("", "") END, "NULL")
                 , COALESCE(CASE WHEN op.OP2RevisionIndikation LIKE "%13%" THEN "Chronische Ulcus  " ELSE CONCAT("", "") END, "NULL")
                 , COALESCE(CASE WHEN op.OP2RevisionIndikation LIKE "%14%" THEN "Chronische Schmerzen  " ELSE CONCAT("", "") END, "NULL")
                 , COALESCE(CASE WHEN op.OP2RevisionIndikation LIKE "%15%" THEN "Ileus  " ELSE CONCAT("", "") END, "NULL")
                 , COALESCE(CASE WHEN op.OP2RevisionIndikation LIKE "%16%" THEN "Choledocholithiasis nach Magen-Bypass  " ELSE CONCAT("", "") END, "NULL")
                 , COALESCE(CASE WHEN op.OP2RevisionIndikation LIKE "%17%" THEN "Leakage  " ELSE CONCAT("", "") END, "NULL")
                 ) AS "Indikation zur Revision",

您现在可能会问“为什么这个人如此间接？” 或“他为什么不使用 PHP 来做这件事？”。我使用 PHP，但在不同的上下文中。在这里，我需要使用 SQL 查询进行直接评估，因为在这段代码中，不是我的所有数据都被提取以在 Excel CSV 文件中自动创建结果集以进行二次处理 - 我不想重新发明轮子.

现在，上述查询并没有做我想做的事。在我的示例中，我想从这个“3、7、9、16”字符串中显示“体重恢复、反流、营养不良、胆总管结石 nach Magen-Bypass”。

我知道 ... LIKE "%3%" ... 在这里不起作用。

有一些使用“FIND_IN_SET('3', op.OP2RevisionIndikation)”的建议，但这里我们不是直接在主 SELECT 语句中，而是在带有 COALESCE 和 CONCAT_WS 的 CASE WHEN THEN ELSE END 过程中。

你们中是否有人知道如何通过将字符串“3、7、9、16”映射到原始值并让 MySQL 以这种方式显示它来正确评估该字符串？

我希望我已经足够透彻并且可以充分理解。

最好的问候，并无限感谢您的帮助

马库斯

4

3 回答 3

1

在更一般的情况下，当目标是将逗号分隔的正整数值列表“转换”为相应字符串的列表时，其顺序与原始值列表相同，并且不引入无关的“逗号”和空格。 ..

我们可以使用一个可怕的表达来实现这一点。

作为示范。

SELECT op.OP2RevisionIndikation
      , CONCAT_WS(', '
        , ELT(SUBSTRING_INDEX(SUBSTRING_INDEX(CONCAT(op.OP2RevisionIndikation,REPEAT(',',21)),',',  1 ),',',-1)+0,'Innere Hernie (Meso)','Innere Hernie (PETERSEN)','Weight Regain','Weight Loss Failure','Anastomosenstenose','Dysphagie','Reflux','Gallenreflux','Malnutrition','Diarrhö','Gastrogastrale Fistel','Ulcusperforation','Chronische Ulcus','Chronische Schmerzen','Ileus','Choledocholithiasis nach Magen-Bypass','Leakage') 
        , ELT(SUBSTRING_INDEX(SUBSTRING_INDEX(CONCAT(op.OP2RevisionIndikation,REPEAT(',',21)),',',  2 ),',',-1)+0,'Innere Hernie (Meso)','Innere Hernie (PETERSEN)','Weight Regain','Weight Loss Failure','Anastomosenstenose','Dysphagie','Reflux','Gallenreflux','Malnutrition','Diarrhö','Gastrogastrale Fistel','Ulcusperforation','Chronische Ulcus','Chronische Schmerzen','Ileus','Choledocholithiasis nach Magen-Bypass','Leakage') 
        , ELT(SUBSTRING_INDEX(SUBSTRING_INDEX(CONCAT(op.OP2RevisionIndikation,REPEAT(',',21)),',',  3 ),',',-1)+0,'Innere Hernie (Meso)','Innere Hernie (PETERSEN)','Weight Regain','Weight Loss Failure','Anastomosenstenose','Dysphagie','Reflux','Gallenreflux','Malnutrition','Diarrhö','Gastrogastrale Fistel','Ulcusperforation','Chronische Ulcus','Chronische Schmerzen','Ileus','Choledocholithiasis nach Magen-Bypass','Leakage') 
        , ELT(SUBSTRING_INDEX(SUBSTRING_INDEX(CONCAT(op.OP2RevisionIndikation,REPEAT(',',21)),',',  4 ),',',-1)+0,'Innere Hernie (Meso)','Innere Hernie (PETERSEN)','Weight Regain','Weight Loss Failure','Anastomosenstenose','Dysphagie','Reflux','Gallenreflux','Malnutrition','Diarrhö','Gastrogastrale Fistel','Ulcusperforation','Chronische Ulcus','Chronische Schmerzen','Ileus','Choledocholithiasis nach Magen-Bypass','Leakage') 
        , ELT(SUBSTRING_INDEX(SUBSTRING_INDEX(CONCAT(op.OP2RevisionIndikation,REPEAT(',',21)),',',  5 ),',',-1)+0,'Innere Hernie (Meso)','Innere Hernie (PETERSEN)','Weight Regain','Weight Loss Failure','Anastomosenstenose','Dysphagie','Reflux','Gallenreflux','Malnutrition','Diarrhö','Gastrogastrale Fistel','Ulcusperforation','Chronische Ulcus','Chronische Schmerzen','Ileus','Choledocholithiasis nach Magen-Bypass','Leakage') 
        , ELT(SUBSTRING_INDEX(SUBSTRING_INDEX(CONCAT(op.OP2RevisionIndikation,REPEAT(',',21)),',',  6 ),',',-1)+0,'Innere Hernie (Meso)','Innere Hernie (PETERSEN)','Weight Regain','Weight Loss Failure','Anastomosenstenose','Dysphagie','Reflux','Gallenreflux','Malnutrition','Diarrhö','Gastrogastrale Fistel','Ulcusperforation','Chronische Ulcus','Chronische Schmerzen','Ileus','Choledocholithiasis nach Magen-Bypass','Leakage') 
        , ELT(SUBSTRING_INDEX(SUBSTRING_INDEX(CONCAT(op.OP2RevisionIndikation,REPEAT(',',21)),',',  7 ),',',-1)+0,'Innere Hernie (Meso)','Innere Hernie (PETERSEN)','Weight Regain','Weight Loss Failure','Anastomosenstenose','Dysphagie','Reflux','Gallenreflux','Malnutrition','Diarrhö','Gastrogastrale Fistel','Ulcusperforation','Chronische Ulcus','Chronische Schmerzen','Ileus','Choledocholithiasis nach Magen-Bypass','Leakage') 
        , ELT(SUBSTRING_INDEX(SUBSTRING_INDEX(CONCAT(op.OP2RevisionIndikation,REPEAT(',',21)),',',  8 ),',',-1)+0,'Innere Hernie (Meso)','Innere Hernie (PETERSEN)','Weight Regain','Weight Loss Failure','Anastomosenstenose','Dysphagie','Reflux','Gallenreflux','Malnutrition','Diarrhö','Gastrogastrale Fistel','Ulcusperforation','Chronische Ulcus','Chronische Schmerzen','Ileus','Choledocholithiasis nach Magen-Bypass','Leakage') 
        , ELT(SUBSTRING_INDEX(SUBSTRING_INDEX(CONCAT(op.OP2RevisionIndikation,REPEAT(',',21)),',',  9 ),',',-1)+0,'Innere Hernie (Meso)','Innere Hernie (PETERSEN)','Weight Regain','Weight Loss Failure','Anastomosenstenose','Dysphagie','Reflux','Gallenreflux','Malnutrition','Diarrhö','Gastrogastrale Fistel','Ulcusperforation','Chronische Ulcus','Chronische Schmerzen','Ileus','Choledocholithiasis nach Magen-Bypass','Leakage') 
        , ELT(SUBSTRING_INDEX(SUBSTRING_INDEX(CONCAT(op.OP2RevisionIndikation,REPEAT(',',21)),',', 10 ),',',-1)+0,'Innere Hernie (Meso)','Innere Hernie (PETERSEN)','Weight Regain','Weight Loss Failure','Anastomosenstenose','Dysphagie','Reflux','Gallenreflux','Malnutrition','Diarrhö','Gastrogastrale Fistel','Ulcusperforation','Chronische Ulcus','Chronische Schmerzen','Ileus','Choledocholithiasis nach Magen-Bypass','Leakage') 
        , ELT(SUBSTRING_INDEX(SUBSTRING_INDEX(CONCAT(op.OP2RevisionIndikation,REPEAT(',',21)),',', 11 ),',',-1)+0,'Innere Hernie (Meso)','Innere Hernie (PETERSEN)','Weight Regain','Weight Loss Failure','Anastomosenstenose','Dysphagie','Reflux','Gallenreflux','Malnutrition','Diarrhö','Gastrogastrale Fistel','Ulcusperforation','Chronische Ulcus','Chronische Schmerzen','Ileus','Choledocholithiasis nach Magen-Bypass','Leakage') 
        , ELT(SUBSTRING_INDEX(SUBSTRING_INDEX(CONCAT(op.OP2RevisionIndikation,REPEAT(',',21)),',', 12 ),',',-1)+0,'Innere Hernie (Meso)','Innere Hernie (PETERSEN)','Weight Regain','Weight Loss Failure','Anastomosenstenose','Dysphagie','Reflux','Gallenreflux','Malnutrition','Diarrhö','Gastrogastrale Fistel','Ulcusperforation','Chronische Ulcus','Chronische Schmerzen','Ileus','Choledocholithiasis nach Magen-Bypass','Leakage') 
        , ELT(SUBSTRING_INDEX(SUBSTRING_INDEX(CONCAT(op.OP2RevisionIndikation,REPEAT(',',21)),',', 13 ),',',-1)+0,'Innere Hernie (Meso)','Innere Hernie (PETERSEN)','Weight Regain','Weight Loss Failure','Anastomosenstenose','Dysphagie','Reflux','Gallenreflux','Malnutrition','Diarrhö','Gastrogastrale Fistel','Ulcusperforation','Chronische Ulcus','Chronische Schmerzen','Ileus','Choledocholithiasis nach Magen-Bypass','Leakage') 
        , ELT(SUBSTRING_INDEX(SUBSTRING_INDEX(CONCAT(op.OP2RevisionIndikation,REPEAT(',',21)),',', 14 ),',',-1)+0,'Innere Hernie (Meso)','Innere Hernie (PETERSEN)','Weight Regain','Weight Loss Failure','Anastomosenstenose','Dysphagie','Reflux','Gallenreflux','Malnutrition','Diarrhö','Gastrogastrale Fistel','Ulcusperforation','Chronische Ulcus','Chronische Schmerzen','Ileus','Choledocholithiasis nach Magen-Bypass','Leakage') 
        , ELT(SUBSTRING_INDEX(SUBSTRING_INDEX(CONCAT(op.OP2RevisionIndikation,REPEAT(',',21)),',', 15 ),',',-1)+0,'Innere Hernie (Meso)','Innere Hernie (PETERSEN)','Weight Regain','Weight Loss Failure','Anastomosenstenose','Dysphagie','Reflux','Gallenreflux','Malnutrition','Diarrhö','Gastrogastrale Fistel','Ulcusperforation','Chronische Ulcus','Chronische Schmerzen','Ileus','Choledocholithiasis nach Magen-Bypass','Leakage') 
        , ELT(SUBSTRING_INDEX(SUBSTRING_INDEX(CONCAT(op.OP2RevisionIndikation,REPEAT(',',21)),',', 16 ),',',-1)+0,'Innere Hernie (Meso)','Innere Hernie (PETERSEN)','Weight Regain','Weight Loss Failure','Anastomosenstenose','Dysphagie','Reflux','Gallenreflux','Malnutrition','Diarrhö','Gastrogastrale Fistel','Ulcusperforation','Chronische Ulcus','Chronische Schmerzen','Ileus','Choledocholithiasis nach Magen-Bypass','Leakage') 
        , ELT(SUBSTRING_INDEX(SUBSTRING_INDEX(CONCAT(op.OP2RevisionIndikation,REPEAT(',',21)),',', 17 ),',',-1)+0,'Innere Hernie (Meso)','Innere Hernie (PETERSEN)','Weight Regain','Weight Loss Failure','Anastomosenstenose','Dysphagie','Reflux','Gallenreflux','Malnutrition','Diarrhö','Gastrogastrale Fistel','Ulcusperforation','Chronische Ulcus','Chronische Schmerzen','Ileus','Choledocholithiasis nach Magen-Bypass','Leakage') 
        , ELT(SUBSTRING_INDEX(SUBSTRING_INDEX(CONCAT(op.OP2RevisionIndikation,REPEAT(',',21)),',', 18 ),',',-1)+0,'Innere Hernie (Meso)','Innere Hernie (PETERSEN)','Weight Regain','Weight Loss Failure','Anastomosenstenose','Dysphagie','Reflux','Gallenreflux','Malnutrition','Diarrhö','Gastrogastrale Fistel','Ulcusperforation','Chronische Ulcus','Chronische Schmerzen','Ileus','Choledocholithiasis nach Magen-Bypass','Leakage') 
        , ELT(SUBSTRING_INDEX(SUBSTRING_INDEX(CONCAT(op.OP2RevisionIndikation,REPEAT(',',21)),',', 19 ),',',-1)+0,'Innere Hernie (Meso)','Innere Hernie (PETERSEN)','Weight Regain','Weight Loss Failure','Anastomosenstenose','Dysphagie','Reflux','Gallenreflux','Malnutrition','Diarrhö','Gastrogastrale Fistel','Ulcusperforation','Chronische Ulcus','Chronische Schmerzen','Ileus','Choledocholithiasis nach Magen-Bypass','Leakage') 
        , ELT(SUBSTRING_INDEX(SUBSTRING_INDEX(CONCAT(op.OP2RevisionIndikation,REPEAT(',',21)),',', 20 ),',',-1)+0,'Innere Hernie (Meso)','Innere Hernie (PETERSEN)','Weight Regain','Weight Loss Failure','Anastomosenstenose','Dysphagie','Reflux','Gallenreflux','Malnutrition','Diarrhö','Gastrogastrale Fistel','Ulcusperforation','Chronische Ulcus','Chronische Schmerzen','Ileus','Choledocholithiasis nach Magen-Bypass','Leakage') 
   ) AS translated
  FROM ( SELECT '' AS OP2RevisionIndikation 
         UNION ALL SELECT '17'         
         UNION ALL SELECT '3'
         UNION ALL SELECT '3, 17'
         UNION ALL SELECT '17, 3, 7'
         UNION ALL SELECT '17 , ,, ,3, flurb, 747, 17'
         UNION ALL SELECT ', x,,,,000017,, 3x  ,,x, 01,,17'
       ) AS op

返回

OP2RevisionIndikation            translated
-------------------------------  -------------------------------------------------------

17                               Leakage
3                                Weight Regain
3, 17                            Weight Regain, Leakage
17, 3, 7                         Leakage, Weight Regain, Reflux
17 , ,, ,3, flurb, 747, 17       Leakage, Weight Regain, Leakage
^^       ^              ^^
, x,,,,000017,, 3x  ,,x, 01,,17  Leakage, Weight Regain, Innere Hernie (Meso), Leakage
           ^^   ^         ^  ^^

注意事项和注意事项：

每一ELT行都是一个精确的副本，除了一个整数，它基本上指定了要提取的逗号分隔的整数列表的第 n 个元素，第 1 个，第 4 个，第 5 个等。

该表达式仅处理列表中有限数量的元素；每个元素都需要一个单独的 ELT 表达式。该示例处理逗号分隔列表中最多 20 个元素；这可以扩展到处理更多元素。

这仅适用于逗号分隔的正整数值列表。逗号之间的每个值都将被评估为整数。这意味着一个元素'x17'将评估为0。元素'-6.2'将评估为-6。元素
'007jamesbond'将评估为7。等等。

来自评估的整数值用作从ELT函数中的字符串列表中“查找”字符串的索引。

计算结果为与列表中的字符串不对应的整数值的元素（例如0, -6）将被忽略，就好像该元素不存在于原始列表中一样。

示例中返回的最后两行显示了我们可能认为格式错误的逗号分隔列表的行为。翻译表达式是“尽力而为”，它返回可以翻译的内容。当逗号分隔的列表格式错误时，表达式不会引发错误，也不会返回 NULL 或空字符串。

于 2018-05-05T14:55:45.577 回答
0

感谢您到目前为止的回答。

FIND_IN_SET 解决方案...

CONCAT_WS(", "
                 , COALESCE(CASE WHEN FIND_IN_SET("1", op.OP2RevisionIndikation) THEN "Innere Hernie (Meso)  " ELSE CONCAT("", "") END, "NULL")
                 , COALESCE(CASE WHEN FIND_IN_SET("2", op.OP2RevisionIndikation) THEN "Innere Hernie (PETERSEN)  " ELSE CONCAT("", "") END, "NULL")
                 , COALESCE(CASE WHEN FIND_IN_SET("3", op.OP2RevisionIndikation) THEN "Weight Regain  " ELSE CONCAT("", "") END, "NULL")
                 , COALESCE(CASE WHEN FIND_IN_SET("4", op.OP2RevisionIndikation) THEN "Weight Loss Failure  " ELSE CONCAT("", "") END, "NULL")
                 , COALESCE(CASE WHEN FIND_IN_SET("5", op.OP2RevisionIndikation) THEN "Anastomosenstenose  " ELSE CONCAT("", "") END, "NULL")
                 , COALESCE(CASE WHEN FIND_IN_SET("6", op.OP2RevisionIndikation) THEN "Dysphagie  " ELSE CONCAT("", "") END, "NULL")
                 , COALESCE(CASE WHEN FIND_IN_SET("7", op.OP2RevisionIndikation) THEN "Reflux  " ELSE CONCAT("", "") END, "NULL")
                 , COALESCE(CASE WHEN FIND_IN_SET("8", op.OP2RevisionIndikation) THEN "Gallenreflux  " ELSE CONCAT("", "") END, "NULL")
                 , COALESCE(CASE WHEN FIND_IN_SET("9", op.OP2RevisionIndikation) THEN "Malnutrition  " ELSE CONCAT("", "") END, "NULL")
                 , COALESCE(CASE WHEN FIND_IN_SET("10", op.OP2RevisionIndikation) THEN "Diarrhö  " ELSE CONCAT("", "") END, "NULL")
                 , COALESCE(CASE WHEN FIND_IN_SET("11", op.OP2RevisionIndikation) THEN "Gastrogastrale Fistel" ELSE CONCAT("", "") END, "NULL")
                 , COALESCE(CASE WHEN FIND_IN_SET("12", op.OP2RevisionIndikation) THEN "Ulcusperforation  " ELSE CONCAT("", "") END, "NULL")
                 , COALESCE(CASE WHEN FIND_IN_SET("13", op.OP2RevisionIndikation) THEN "Chronische Ulcus  " ELSE CONCAT("", "") END, "NULL")
                 , COALESCE(CASE WHEN FIND_IN_SET("14", op.OP2RevisionIndikation) THEN "Chronische Schmerzen  " ELSE CONCAT("", "") END, "NULL")
                 , COALESCE(CASE WHEN FIND_IN_SET("15", op.OP2RevisionIndikation) THEN "Ileus  " ELSE CONCAT("", "") END, "NULL")
                 , COALESCE(CASE WHEN FIND_IN_SET("16", op.OP2RevisionIndikation) THEN "Choledocholithiasis nach Magen-Bypass  " ELSE CONCAT("", "") END, "NULL")
                 , COALESCE(CASE WHEN FIND_IN_SET("17", op.OP2RevisionIndikation) THEN "Leakage  " ELSE CONCAT("", "") END, "NULL")
                 ) AS "Indikation zur Revision",

...能够识别单个项目。但它不处理逗号：

从“3、7、9、16”中，“3”被正确识别，但其余的根本没有，所以我只显示了这些项目中的第一个：

在此处输入图像描述

于 2018-05-05T06:37:43.080 回答
0

啊，尼克的最后一条评论成功了：

CONCAT_WS(", "
                 , COALESCE(CASE WHEN FIND_IN_SET("1", REPLACE(op.OP2RevisionIndikation, ' ', '')) THEN "Innere Hernie (Meso)  " ELSE CONCAT("", "") END, "NULL")
                 , COALESCE(CASE WHEN FIND_IN_SET("2", REPLACE(op.OP2RevisionIndikation, ' ', '')) THEN "Innere Hernie (PETERSEN)  " ELSE CONCAT("", "") END, "NULL")
                 , COALESCE(CASE WHEN FIND_IN_SET("3", REPLACE(op.OP2RevisionIndikation, ' ', '')) THEN "Weight Regain  " ELSE CONCAT("", "") END, "NULL")
                 , COALESCE(CASE WHEN FIND_IN_SET("4", REPLACE(op.OP2RevisionIndikation, ' ', '')) THEN "Weight Loss Failure  " ELSE CONCAT("", "") END, "NULL")
                 , COALESCE(CASE WHEN FIND_IN_SET("5", REPLACE(op.OP2RevisionIndikation, ' ', '')) THEN "Anastomosenstenose  " ELSE CONCAT("", "") END, "NULL")
                 , COALESCE(CASE WHEN FIND_IN_SET("6", REPLACE(op.OP2RevisionIndikation, ' ', '')) THEN "Dysphagie  " ELSE CONCAT("", "") END, "NULL")
                 , COALESCE(CASE WHEN FIND_IN_SET("7", REPLACE(op.OP2RevisionIndikation, ' ', '')) THEN "Reflux  " ELSE CONCAT("", "") END, "NULL")
                 , COALESCE(CASE WHEN FIND_IN_SET("8", REPLACE(op.OP2RevisionIndikation, ' ', '')) THEN "Gallenreflux  " ELSE CONCAT("", "") END, "NULL")
                 , COALESCE(CASE WHEN FIND_IN_SET("9", REPLACE(op.OP2RevisionIndikation, ' ', '')) THEN "Malnutrition  " ELSE CONCAT("", "") END, "NULL")
                 , COALESCE(CASE WHEN FIND_IN_SET("10", REPLACE(op.OP2RevisionIndikation, ' ', '')) THEN "Diarrhö  " ELSE CONCAT("", "") END, "NULL")
                 , COALESCE(CASE WHEN FIND_IN_SET("11", REPLACE(op.OP2RevisionIndikation, ' ', '')) THEN "Gastrogastrale Fistel" ELSE CONCAT("", "") END, "NULL")
                 , COALESCE(CASE WHEN FIND_IN_SET("12", REPLACE(op.OP2RevisionIndikation, ' ', '')) THEN "Ulcusperforation  " ELSE CONCAT("", "") END, "NULL")
                 , COALESCE(CASE WHEN FIND_IN_SET("13", REPLACE(op.OP2RevisionIndikation, ' ', '')) THEN "Chronische Ulcus  " ELSE CONCAT("", "") END, "NULL")
                 , COALESCE(CASE WHEN FIND_IN_SET("14", REPLACE(op.OP2RevisionIndikation, ' ', '')) THEN "Chronische Schmerzen  " ELSE CONCAT("", "") END, "NULL")
                 , COALESCE(CASE WHEN FIND_IN_SET("15", REPLACE(op.OP2RevisionIndikation, ' ', '')) THEN "Ileus  " ELSE CONCAT("", "") END, "NULL")
                 , COALESCE(CASE WHEN FIND_IN_SET("16", REPLACE(op.OP2RevisionIndikation, ' ', '')) THEN "Choledocholithiasis nach Magen-Bypass  " ELSE CONCAT("", "") END, "NULL")
                 , COALESCE(CASE WHEN FIND_IN_SET("17", REPLACE(op.OP2RevisionIndikation, ' ', '')) THEN "Leakage  " ELSE CONCAT("", "") END, "NULL")
                 ) AS "Indikation zur Revision",

结果显示在此屏幕截图中：

在此处输入图像描述

现在唯一剩下要做的就是一个漂亮的格式（做逗号和空格等）。

问题解决了。

于 2018-05-05T06:52:28.953 回答