我想隐藏id如果不喜欢但不工作选择*从character，character\u actor where character.id不喜欢character\u actor.character\u id；

6tdlim6h 于 2021-06-21 发布在 Mysql

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我想隐藏身份证，如果不喜欢，但不工作
选择*from character，character\u actor where character.id不喜欢character\u actor.character\u id；

id  name    id  character_id    actor_name
1   Doogie Howser   1   4       Alyson Hannigan
1   Doogie Howser   2   3       Alyson Hannigan
1   Doogie Howser   3   2       Neil Patrick Harris
2   Barney Stinson  1   4       Alyson Hannigan
2   Barney Stinson  2   3       Alyson Hannigan
2   Barney Stinson  4   1       Neil Patrick Harris
3   Lily Aldrin     1   4      Alyson Hannigan
3   Lily Aldrin     3   2    Neil Patrick Harris
3   Lily Aldrin     4   1    Neil Patrick Harris
4   Willow Rosenberg 2  3   Alyson Hannigan
4   Willow Rosenberg 3  2   Neil Patrick Harris
4   Willow Rosenberg 4  1   Neil Patrick Harris

sql mysql sql-server

来源：https://stackoverflow.com/questions/50999020/i-wanna-hide-id-if-not-like-but-dont-work-select-from-character-character-ac

3条答案

按热度按时间

9wbgstp71#

您需要一个“不在”查询：

SELECT *
FROM character WHERE character.id NOT IN (SELECT character_actor.character_id from character_actor)

它也可以通过一个不存在的。根据dbms和结构的不同，这可能会导致更好的性能。

SELECT *
FROM character c WHERE NOT EXISTS(SELECT NULL from character_actor ca WHERE ca.character_id=c.id)

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n8ghc7c12#

尝试此查询

SELECT *
FROM character as c JOIN character_actor as ca
ON c.character_id != ca.character_id

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3wabscal3#

例如，我有两个表，我想得到两个\u table.name而不是一个\u table.name

one_table
id  name    
1   Dave    
2   Mary    
3   Fry male    
4   Leela   
5   Odie    

two_table
id  name    
1   Dave    
2   Mary    
3   Fry male    
4   Leela   
5   Odie    
6   Jumpy   
7   Sneakers
8   Jack
9   Malia
10  Lee

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我想隐藏id如果不喜欢但不工作选择*从character，character\u actor where character.id不喜欢character\u actor.character\u id；

3条答案

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