SQL：如何使用条件where子句构造选择查询？

Question

I would like to perform an SQL select query with conditional 'and' clauses but am having difficulty.

I would like to do something like this:

select * from customer
    where active = true
    and 
    case 
    when state = 'AK'
        then zipcode like '%701'
    when state = 'NV'
        then zipcode like '%523'
    else
        then phone not null;

How do I go about structuring my query to do this?

Thanks in advance for any guidance provided.

Answer 1

Do you mean?

select * from customer
where active = true
and ((state = 'AK' and zipcode like '%701')
    or (state = 'NV' and zipcode like '%523')
    or (phone not null))

Answer 2

I think you can use or instead of case .

select * from customer
where active = true
and ( (state = 'AK' and zipcode like '%701') or (state = 'NV' and zipcode like '%523') )
and phone is not null;