sql - Case statement returning '0' -


i need case statement return empty string if value null or -1 it's returning 0. employeecount int , i'm assuming needs cast varchar nothing i've tried seems working.

case    when employeecount = -1 ''   when employeecount null ''   else employeecount end

this not working either:

case    when employeecount = -1 ''   when employeecount null ''   else cast(employeecount varchar(10)) end

a case expression returns single type. if have then clauses evaluate strings , others evaluate numbers, database decide result number, not string. why seeing 0. '' looks when converted number.

the solution simple: cast() result string:

(case when employeecount = -1 or employeecount null ''       else cast(employeecount varchar(32))  end)

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