如何使用sqldf保持R格式的日期？

Question

如何在不更改格式的情况下重命名SQLDF中的日期字段？

请参阅下面的示例,其中我的重命名日期字段"dt"将日期转换为数字.我该如何避免这种情况,或将其转换回日期？

#Question for Stack Exchange
df <- data.frame (date = c("2014-12-01","2014-12-02","2014-12-03"),
            acct = c(1,2,3))

df$date = as.Date(df$date)

library("sqldf")
sqldf('
    select 
        date as dt,
        date,
        acct
    from df ')


     dt       date acct
1 16405 2014-12-01    1
2 16406 2014-12-02    2
3 16407 2014-12-03    3

Answer 1

Specify the method as follows:

sqldf('select date as dt__Date,
              date as date__Date,
              acct
       from df',
      method = "name__class")