Question

lets assume i have a staement variable like this:

sql_ins = "INSERT INTO tableName (field1,field2,field3) VALUES ("&var1&","&var2&","&var3&")

well, let’s say that var1, var2, var3 could be also null, and the database has default values as null.

the problem is that i could insert a NULL value, but if the variable is null it will be empty, so the sql_ins should look like:

INSERT INTO tableName (field1,field2,field3) VALUES (4,,)

how i could avoid it?

thanks in advance.

real code here:

For Each Field in Request.Form
    TheString = Field & "=Request.Form(""" _
    & Field & """)"
    EXECUTE(TheString)
Next

if imm_id <> "" then
'TODO modifica
else 
sql_ins = "INSERT INTO tb_immobile (`IdServizio`, `CodiceAppartamento`, `Nome`, `IdLocalita`, `Localita`, `NumeroPiano`, `Piano`, `NumeroScalini`, `Camere`, `Singole`, `Matrimoniali`, `Bagni`, `Vani`, `IdTipo`, `IdPosizione`, `IdAspetto`, `IdRistrutturato`, `IdAmmobiliato`, `IdStato`, `Mq`, `Annesso`, `IdAnnessoRistrutturato`, `Giardino`, `Terrazza`, `Terreno`, `Cantina`, `AriaCondizionata`, `Ascensore`, `PostiAuto`, `Piscina`, `Tennis`, `IdRiscaldamento`, `Condominio`, `idAllegato`, `idUtente`, `idImportazione`, `idZona`, `idDove`, `homePage`, `codTipoVisaulizzazione`) VALUES "
sql_ins = sql_ins&"(1,"&imm_codice&","&imm_nome&","&imm_provincia&",'"&imm_localita&"',"&imm_npiani&","&imm_piano&","&imm_scalini&","&imm_camere&","&imm_camere_sing&","&imm_camere_mat&","&imm_bagni&","&imm_vani&","&imm_tipo&","&imm_posizione&","&imm_aspetto&","&imm_ristrutturato&","&imm_ammobiliato&","&imm_stato&","&imm_mq&"...  )"


end if

in the first for each i create and populate the variables, but some of them should be empty.

Answer 1

if var1 Is Nothing then var1 = "NULL" end if