从表中选择数值，其中数值以逗号分隔的字符串。

Posted 2021-03-19

这是我的第一个帖子......我正忙着用Access 2010写一个软件。我的SQL还算不错，但我在这里有点支支吾吾。

我有一个表，布局如下

ID = AutoNumber, 
Category = Text, 
SubCategory = Text, 
Grades = Text.

而以下数据

ID  Category    SubCategory   Grades
2   Behaviour   Good          RRR,RR,R,1,2,3,4,5,6,7,8,9,10,11,12
3   Behaviour   Not so Good   RRR,RR,R,1,2,3,4,5,6,7,8,9,10,11,12
4   Health      Doctor Note   RRR,RR,R,1,2,3,4,5,6,7,8,9,10,11,12
5   Social      Peer Pressure   
6   Academics   General Academic Knowledge      1,2,3
7   Academics   Additional Academic Knowledge   1,2,3
8   Gross Motor Skills  Kicks a ball that is moving towards him or her. 
9   Gross Motor Skills  Hops and jumps while in motion  R
10  Gross Motor Skills  Skips   RR
11  Gross Motor Skills  Gallops RR
12  Gross Motor Skills  Jumps forward 10 times  RR
13  Gross Motor Skills  Catches a small bounced ball    RR
14  Gross Motor Skills  Turns somersault    RR
15  Gross Motor Skills  Alternates feet walking up or down stairs   RR`

我试图创建一个查询，在这个查询中，我选择例如

SELECT SubCategory from CATEGORY WHERE GRADES LIKE R

而它应该返回

Good
Not so Good
Doctors Note
Peer Pressure
Hops jumps and Skips

很明显，如果我需要RRR或1或2或5级，它应该根据需要选择。

请谁能帮助我，谢谢Warren

答案

你可以用操作符来实现 LIKE 这种方式。

SELECT SubCategory 
FROM CATEGORY 
WHERE ',' + GRADES + ',' LIKE '*,R,*'

或者如果你想要查询的值 'R' 分别作为参数。

SELECT SubCategory 
FROM CATEGORY 
WHERE ',' + GRADES + ',' LIKE '*,' + 'R' + ',*'