清理mysql中的数据

我有一个非常大的数据集，它被破坏得有点太远了，我需要把它拉回来

例如，假设数据是DVD盒集。最初的编目员将每一集作为一个条目添加（但按季进行了标识）。但是，我们只关心盒装DVD中的单个DVD

我想编写一个查询，根据ID号将这些条目分组，并将标题添加到blob字段中

那就是

给定一个如下所示的记录集

| ID        | Title
+-----------+------------------------------------------------------------
| 1234      | Batman: Season 1, Episode 6: "Batman Is Riled"                                                                                                         | 
| 1234      | Batman: Season 1, Episode 7: "Instant Freeze"                                                                                                          | 
| 5678      | Batman: Season 2, Episode 9: "The Greastest Mother of Them All"                                                                                        | 
| 5678      | Batman: Season 2, Episode 7: "The Spell of Tut"                                                                                                        | 
| 5678      | Batman: Season 2, Episode 6: "Barbecued Batman?"                                                                                                       | 
| 5678      | Batman: Season 2, Episode 3: "Hot Off the Griddle"                                                                                                     |   
| 9012      | Batman: Season 3, Episode 24: "The Joker's Flying Saucer"                                                                                              | 
| 9012      | Batman: Season 3, Episode 25: "The Entracing Dr. Cassandra"                                                                                            | 
| 9012      | Batman: Season 3, Episode 26: "Minerva, Mayhem and Millionaires"   

我想把它转换成一个新的结构，比如

| ID        | Title  | Description
| 1234      | Batman |Batman: Season 1, Episode 6: "Batman Is Riled"; Batman: Season 1, Episode 7: "Instant Freeze"                                                                                                          | 
| 5678      | Batman |Batman: Season 2, Episode 9: "The Greastest Mother of Them; Batman: Season 2, Episode 7: "The Spell of Tut"; Batman: Season 2, Episode 6: "Barbecued Batman?"; Batman: Season 2, Episode 3: "Hot Off the Griddle"                                                                                                     |   
| 9012      | Batman |Batman: Season 3, Episode 24: "The Joker's Flying Saucer"; Batman: Season 3, Episode 25: "The Entracing Dr. Cassandra"; Batman: Season 3, Episode 26: "Minerva, Mayhem and Millionaires"   

这在mysql中是可能的，还是我需要把它放到电子表格中

就行了

MySQL 5.6架构设置：

CREATE TABLE dvd
    (`ID` int, `Title` varchar(64))
;

INSERT INTO dvd
    (`ID`, `Title`)
VALUES
    (1234, 'Batman: Season 1, Episode 6: "Batman Is Riled"'),
    (1234, 'Batman: Season 1, Episode 7: "Instant Freeze"'),
    (5678, 'Batman: Season 2, Episode 9: "The Greastest Mother of Them All"'),
    (5678, 'Batman: Season 2, Episode 7: "The Spell of Tut"'),
    (5678, 'Batman: Season 2, Episode 6: "Barbecued Batman?"'),
    (5678, 'Batman: Season 2, Episode 3: "Hot Off the Griddle"'),
    (9012, 'Batman: Season 3, Episode 24: "The Joker''s Flying Saucer"'),
    (9012, 'Batman: Season 3, Episode 25: "The Entracing Dr. Cassandra"'),
    (9012, 'Batman: Season 3, Episode 26: "Minerva, Mayhem and Millionaires"')
;

select id, substring(title,1,locate(":",title)-1) title, 
group_concat(title SEPARATOR ";") as description
from dvd
group by ID

|   ID |  title |                                                                                                                                                                                                         description |
|------|--------|---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| 1234 | Batman |                                                                                                                        Batman: Season 1, Episode 6: "Batman Is Riled";Batman: Season 1, Episode 7: "Instant Freeze" |
| 5678 | Batman | Batman: Season 2, Episode 9: "The Greastest Mother of Them All";Batman: Season 2, Episode 7: "The Spell of Tut";Batman: Season 2, Episode 6: "Barbecued Batman?";Batman: Season 2, Episode 3: "Hot Off the Griddle" |
| 9012 | Batman |                              Batman: Season 3, Episode 24: "The Joker's Flying Saucer";Batman: Season 3, Episode 25: "The Entracing Dr. Cassandra";Batman: Season 3, Episode 26: "Minerva, Mayhem and Millionaires" |

查询1：

CREATE TABLE dvd
    (`ID` int, `Title` varchar(64))
;

INSERT INTO dvd
    (`ID`, `Title`)
VALUES
    (1234, 'Batman: Season 1, Episode 6: "Batman Is Riled"'),
    (1234, 'Batman: Season 1, Episode 7: "Instant Freeze"'),
    (5678, 'Batman: Season 2, Episode 9: "The Greastest Mother of Them All"'),
    (5678, 'Batman: Season 2, Episode 7: "The Spell of Tut"'),
    (5678, 'Batman: Season 2, Episode 6: "Barbecued Batman?"'),
    (5678, 'Batman: Season 2, Episode 3: "Hot Off the Griddle"'),
    (9012, 'Batman: Season 3, Episode 24: "The Joker''s Flying Saucer"'),
    (9012, 'Batman: Season 3, Episode 25: "The Entracing Dr. Cassandra"'),
    (9012, 'Batman: Season 3, Episode 26: "Minerva, Mayhem and Millionaires"')
;

select id, substring(title,1,locate(":",title)-1) title, 
group_concat(title SEPARATOR ";") as description
from dvd
group by ID

|   ID |  title |                                                                                                                                                                                                         description |
|------|--------|---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| 1234 | Batman |                                                                                                                        Batman: Season 1, Episode 6: "Batman Is Riled";Batman: Season 1, Episode 7: "Instant Freeze" |
| 5678 | Batman | Batman: Season 2, Episode 9: "The Greastest Mother of Them All";Batman: Season 2, Episode 7: "The Spell of Tut";Batman: Season 2, Episode 6: "Barbecued Batman?";Batman: Season 2, Episode 3: "Hot Off the Griddle" |
| 9012 | Batman |                              Batman: Season 3, Episode 24: "The Joker's Flying Saucer";Batman: Season 3, Episode 25: "The Entracing Dr. Cassandra";Batman: Season 3, Episode 26: "Minerva, Mayhem and Millionaires" |

：

CREATE TABLE dvd
    (`ID` int, `Title` varchar(64))
;

INSERT INTO dvd
    (`ID`, `Title`)
VALUES
    (1234, 'Batman: Season 1, Episode 6: "Batman Is Riled"'),
    (1234, 'Batman: Season 1, Episode 7: "Instant Freeze"'),
    (5678, 'Batman: Season 2, Episode 9: "The Greastest Mother of Them All"'),
    (5678, 'Batman: Season 2, Episode 7: "The Spell of Tut"'),
    (5678, 'Batman: Season 2, Episode 6: "Barbecued Batman?"'),
    (5678, 'Batman: Season 2, Episode 3: "Hot Off the Griddle"'),
    (9012, 'Batman: Season 3, Episode 24: "The Joker''s Flying Saucer"'),
    (9012, 'Batman: Season 3, Episode 25: "The Entracing Dr. Cassandra"'),
    (9012, 'Batman: Season 3, Episode 26: "Minerva, Mayhem and Millionaires"')
;

select id, substring(title,1,locate(":",title)-1) title, 
group_concat(title SEPARATOR ";") as description
from dvd
group by ID

|   ID |  title |                                                                                                                                                                                                         description |
|------|--------|---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| 1234 | Batman |                                                                                                                        Batman: Season 1, Episode 6: "Batman Is Riled";Batman: Season 1, Episode 7: "Instant Freeze" |
| 5678 | Batman | Batman: Season 2, Episode 9: "The Greastest Mother of Them All";Batman: Season 2, Episode 7: "The Spell of Tut";Batman: Season 2, Episode 6: "Barbecued Batman?";Batman: Season 2, Episode 3: "Hot Off the Griddle" |
| 9012 | Batman |                              Batman: Season 3, Episode 24: "The Joker's Flying Saucer";Batman: Season 3, Episode 25: "The Entracing Dr. Cassandra";Batman: Season 3, Episode 26: "Minerva, Mayhem and Millionaires" |

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你知道NF吗？看一下用什么编程语言编写的group concat函数？@lxer我正准备用纯语言编写mysql@MarshallTigerus先生，把它写在答案栏，这样我就可以接受了。