I have company table in which projects information is stored in 
list:reference , now i want to remove the project id from company table 
reference field without using loop , simple by DAL update query

*Company Table*
|  *id*  |  *name*  |  *projects*  |
|  1   |  Com1  |  |1|2|     |

So after update my table should become


*Company Table*
|  *id*  |  *name*  |  *projects*  |
|  1   |  Com1  |  |2|     |



I need to write a update query that will remove project id from list 
reference without using select query and for loop first
Thanks! 

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