Place a hyphen when the value is 0 in select

@Eduardo Santos,

If you want to change the 0 by the hyphen in a select you do this:

SELECT IF(seu_campo = 0, '-', seu_campo) AS nome_para_esse_resultado FROM sua_tabela;

You can use a IF in the query .

The IF receives three "parameters", the first is the condition, the second is the value that the column will assume if the condition is met and the third is the value that the column will assume otherwise. >

Select If(Campo = 0, '-', Campo) From Tabela 

IF Documentation

Select IIF(Campo = 0, '-', campo) AS CAMPOSELECIONADO from TABELA

This would work for you.