sql - How can I get that result from CASE statament in MySQL? - 


select field_name, sum(case when field_name not null  1 else 0 end) count table_name group department   result is:  field_name    count   aaa              9 bbb              0 ccc              7

but how can rows have more 0 in second column.

  select field_name,          sum(case when field_name not null                   1                   else 0              end) count     table_name group department   having `count` > 0

having clause executed after where , group by can address aggregating functions


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