SQLite sample

for row in db:nrows[[SELECT * FROM a ORDER BY name ASC]] do
    if row.name:sub(1,1):upper() ~= (listData[#listData] and listData[#listData].title:sub(1,1):upper()) then
        table.insert(listData, {categoryName=row.name:sub(1,1):upper()})
    end
    table.insert(listData, {title = {label = row.name, top = 0,},})
end