由于字符，从 Chinook 数据集中检索 table 时出现问题

Question

我在 MySQL 中使用 Chinook 数据集中的数据创建了一个数据库，其中包含有关购买音乐的客户的虚构信息。

其中一个表格（“发票”）包含帐单地址，其中包含多种语言的字符：

InvoiceId   CustomerId    InvoiceDate            BillingAddress    
1           2             2009-01-01 00:00:00    Theodor-Heuss-Straße 34
2           4             2009-01-02 00:00:00    Ullevålsveien 14
3           8             2009-01-03 00:00:00    Grétrystraat 63
4           14            2009-01-06 00:00:00    8210 111 ST NW

我尝试使用 R 检索数据，代码如下：

library(DBI)
library(RMySQL)
library(dplyr)
library(magrittr)
library(lubridate)
library(stringi)

# Step 1 - Connect to the database ----------------------------------------
con <- DBI::dbConnect(MySQL(),
                      dbname = Sys.getenv("DB_CHINOOK"),
                      host = Sys.getenv("HST_CHINOOK"),
                      user = Sys.getenv("USR_CHINOOK"),
                      password = Sys.getenv("PASS_CHINOOK"),
                      port = XXXX)

invoices_tbl <- tbl(con, "Invoice") %>%
  collect()

连接没问题，但是在尝试可视化数据时，我看不到特殊字符：

> head(invoices_tbl[,1:4])
# A tibble: 6 x 4
  InvoiceId CustomerId InvoiceDate         BillingAddress              
      <int>      <int> <chr>               <chr>                       
1         1          2 2009-01-01 00:00:00 "Theodor-Heuss-Stra\xdfe 34"
2         2          4 2009-01-02 00:00:00 "Ullev\xe5lsveien 14"       
3         3          8 2009-01-03 00:00:00 "Gr\xe9trystraat 63"        
4         4         14 2009-01-06 00:00:00 "8210 111 ST NW"            
5         5         23 2009-01-11 00:00:00 "69 Salem Street"           
6         6         37 2009-01-19 00:00:00 "Berger Stra\xdfe 10"

我的问题是，我是否应该更改 MySQL 中的配置？还是 R 的问题？我怎样才能看到特殊字符？ \xdfe是什么意思？

拜托，我们将不胜感激。

Answer 1

十六进制格式可以用iconv

转换

invoices_tbl$BillingAddress <- iconv(invoices_tbl$BillingAddress, 
        "latin1", "utf-8")

-输出

invoices_tbl
  InvoiceId CustomerId         InvoiceDate          BillingAddress
1         1          2 2009-01-01 00:00:00 Theodor-Heuss-Straße 34
2         2          4 2009-01-02 00:00:00        Ullevålsveien 14
3         3          8 2009-01-03 00:00:00         Grétrystraat 63
4         4         14 2009-01-06 00:00:00          8210 111 ST NW
5         5         23 2009-01-11 00:00:00         69 Salem Street
6         6         37 2009-01-19 00:00:00        Berger Straße 10

数据

invoices_tbl <- structure(list(InvoiceId = 1:6, CustomerId = c(2L, 4L, 8L, 14L, 
23L, 37L), InvoiceDate = c("2009-01-01 00:00:00", "2009-01-02 00:00:00", 
"2009-01-03 00:00:00", "2009-01-06 00:00:00", "2009-01-11 00:00:00", 
"2009-01-19 00:00:00"), BillingAddress = c("Theodor-Heuss-Stra\xdfe 34", 
"Ullev\xe5lsveien 14", "Gr\xe9trystraat 63", "8210 111 ST NW", 
"69 Salem Street", "Berger Stra\xdfe 10")), row.names = c("1", 
"2", "3", "4", "5", "6"), class = "data.frame")

由于字符，从 Chinook 数据集中检索 table 时出现问题

Problem with retrieving a table from Chinook dataset due to character

mysql

r

dbi

数据