Multiple selection in the list field type

[Nareshk5]

Hi Everyone , 

We are having one requirment , in which the field is List type , and the user want to select multiple records in single time not one by one , can someone suggest how we can proceed further ?

it is possible to add check box inthe pop up window?

[Mark Manders]

Are you in the workspace, legacy view or referring to a variable on a portal form?

[Nareshk5]

Hi Mark , 

 This requirment in the database table form  , and the variable also in the database table