如何设计表架构以存储来自的值<select multiple>

Question

I have a select-multiple list html control, which enables end user to select multiple items. Currently, I stored user selected values as "truck, heavy truck, others" into mysql varchar field. But both truck and heavy truck are searched out if user select truck on select multiple control. SQL statement for this query is like "select truckType from table where trackType like '%truck%'".

Seems the only way for the solution is to put selected values into another table.

Is there any other way to handle this issue in one table?

Answer 1

add , to the end and start also

so value becomes , truck, heavy truck, others,

use this query

select truckType from table where trackType like '%, truck,%

NOTE: , in like '%, truck,%'

Answer 2

you should make a separate table:

------------------
typeId | type        |
-----------------
1      | truck       |
2      | heavy truck |
....

Also table for entity:

------------------
entityid |         |
-----------------
1        | entity1 |
2        | entity2 |

and other table will have multiple to one relationship with this table:

-------------------------------
id | typeId      | entityId    |
-------------------------------
1  | 1           | 2           |
2  | 2           | 2           |
2  | 2           | 1           |

And your select would be a join of this two tables.