Sql 是否使用源行合并到目标列？

我有一些结构良好的数据，如下所示：

CREATE TABLE SourceBodyPartColors
(
 person_ID INTEGER NOT NULL, 
 body_part_name VARCHAR(5) NOT NULL
    CHECK (body_part_name IN ('hair', 'eye', 'teeth')), 
 color VARCHAR(20) NOT NULL, 
 UNIQUE (color, body_part_name, person_ID)
);

INSERT INTO SourceBodyPartColors (person_ID, body_part_name, color)
   VALUES (1, 'eye', 'blue'), 
          (1, 'hair', 'blond'), 
          (1, 'teeth', 'white'), 
          (2, 'hair', 'white'), 
          (2, 'teeth', 'yellow'), 
          (3, 'hair', 'red');

CREATE TABLE TargetBodyPartColors
(
 person_ID INTEGER NOT NULL UNIQUE, 
 eye_color VARCHAR(20), 
 hair_color VARCHAR(20), 
 teeth_color VARCHAR(20)
);

INSERT INTO TargetBodyPartColors (person_ID)
   VALUES (1), (2), (3);

UPDATE TargetBodyPartColors
   SET eye_color = (
                    SELECT S1.color
                      FROM SourceBodyPartColors AS S1
                     WHERE S1.person_ID 
                              = TargetBodyPartColors.person_ID
                           AND S1.body_part_name = 'eye'
                   ), 
       hair_color = (
                     SELECT S1.color
                       FROM SourceBodyPartColors AS S1
                      WHERE S1.person_ID 
                               = TargetBodyPartColors.person_ID
                            AND S1.body_part_name = 'hair'
                    ), 
       teeth_color = (
                      SELECT S1.color
                        FROM SourceBodyPartColors AS S1
                       WHERE S1.person_ID 
                                = TargetBodyPartColors.person_ID
                             AND S1.body_part_name = 'teeth'
                     );

遗憾的是，目标结构不太好，看起来更像这样：

CREATE TABLE SourceBodyPartColors
(
 person_ID INTEGER NOT NULL, 
 body_part_name VARCHAR(5) NOT NULL
    CHECK (body_part_name IN ('hair', 'eye', 'teeth')), 
 color VARCHAR(20) NOT NULL, 
 UNIQUE (color, body_part_name, person_ID)
);

INSERT INTO SourceBodyPartColors (person_ID, body_part_name, color)
   VALUES (1, 'eye', 'blue'), 
          (1, 'hair', 'blond'), 
          (1, 'teeth', 'white'), 
          (2, 'hair', 'white'), 
          (2, 'teeth', 'yellow'), 
          (3, 'hair', 'red');

CREATE TABLE TargetBodyPartColors
(
 person_ID INTEGER NOT NULL UNIQUE, 
 eye_color VARCHAR(20), 
 hair_color VARCHAR(20), 
 teeth_color VARCHAR(20)
);

INSERT INTO TargetBodyPartColors (person_ID)
   VALUES (1), (2), (3);

UPDATE TargetBodyPartColors
   SET eye_color = (
                    SELECT S1.color
                      FROM SourceBodyPartColors AS S1
                     WHERE S1.person_ID 
                              = TargetBodyPartColors.person_ID
                           AND S1.body_part_name = 'eye'
                   ), 
       hair_color = (
                     SELECT S1.color
                       FROM SourceBodyPartColors AS S1
                      WHERE S1.person_ID 
                               = TargetBodyPartColors.person_ID
                            AND S1.body_part_name = 'hair'
                    ), 
       teeth_color = (
                      SELECT S1.color
                        FROM SourceBodyPartColors AS S1
                       WHERE S1.person_ID 
                                = TargetBodyPartColors.person_ID
                             AND S1.body_part_name = 'teeth'
                     );

我可以像这样编写SQL-92

更新

：

CREATE TABLE SourceBodyPartColors
(
 person_ID INTEGER NOT NULL, 
 body_part_name VARCHAR(5) NOT NULL
    CHECK (body_part_name IN ('hair', 'eye', 'teeth')), 
 color VARCHAR(20) NOT NULL, 
 UNIQUE (color, body_part_name, person_ID)
);

INSERT INTO SourceBodyPartColors (person_ID, body_part_name, color)
   VALUES (1, 'eye', 'blue'), 
          (1, 'hair', 'blond'), 
          (1, 'teeth', 'white'), 
          (2, 'hair', 'white'), 
          (2, 'teeth', 'yellow'), 
          (3, 'hair', 'red');

CREATE TABLE TargetBodyPartColors
(
 person_ID INTEGER NOT NULL UNIQUE, 
 eye_color VARCHAR(20), 
 hair_color VARCHAR(20), 
 teeth_color VARCHAR(20)
);

INSERT INTO TargetBodyPartColors (person_ID)
   VALUES (1), (2), (3);

UPDATE TargetBodyPartColors
   SET eye_color = (
                    SELECT S1.color
                      FROM SourceBodyPartColors AS S1
                     WHERE S1.person_ID 
                              = TargetBodyPartColors.person_ID
                           AND S1.body_part_name = 'eye'
                   ), 
       hair_color = (
                     SELECT S1.color
                       FROM SourceBodyPartColors AS S1
                      WHERE S1.person_ID 
                               = TargetBodyPartColors.person_ID
                            AND S1.body_part_name = 'hair'
                    ), 
       teeth_color = (
                      SELECT S1.color
                        FROM SourceBodyPartColors AS S1
                       WHERE S1.person_ID 
                                = TargetBodyPartColors.person_ID
                             AND S1.body_part_name = 'teeth'
                     );

…但重复的代码让我很烦恼

我想，这是一个简化使用

合并
的好方法，但我想不出任何合理的方法

如何使用
合并
此数据的任何想法。（注意：我想避免专有的
UPDATE..FROM syntax
，谢谢。）
AFAIK，MERGE是SQL:2003，这真的更好吗？@marc_s:我明白为什么你可能认为它是EAV，但实际上不是。请参阅Wikipedia关于第一范式的文章（）：“目标”结构类似于副标题“跨列重复组”（即1NF违规）下显示的
Customer
表。“源”结构更像是“符合1NF的设计”子目下显示的
客户电话表
表。@onedaywhen-我不同意。我对1NF冲突的经验法则是，您可以交换列值，并且仍然得到语义相同的结果。如果您可以交换
tel1
和
tel2
，并且语义保持不变，那么这显然不在1NF中。c、 f.@Martin:你对1NF有自己的定义？！嗯，呃。。。我想这一定会让你感到安慰：）@Martin:不过说真的。我认识到我快速起草的数据存在缺陷，例如“头发颜色”与“眼睛颜色”不属于同一领域。。。谁有金色的眼睛？！：）