如何在 Ubuntu 16.04 上将 Ms SQL 服务器与 R 连接？

Question

我无法使用 RODBC 和 RJDBC 将 R 与 MS sql 连接

使用 RODBC

library(RODBC)
dbhandle <- odbcDriverConnect(paste("driver={SQL Server};server=", sname, ";database=", 
                                      dbname, ";uid=", user,";pwd=",password, sep = ""))

res <- sqlFetch(dbhandle, client.table_name) 

我得到的错误是：

Warning messages:
1: In odbcDriverConnect(paste("driver=SQL Server;server=", sname, ";database=",  :
  [RODBC] ERROR: state 01000, code 0, message [unixODBC][Driver Manager]Can't open lib 'SQL Server' : file not found
2: In odbcDriverConnect(paste("driver=SQL Server;server=", sname, ";database=",  :
  ODBC connection failed 

我也试过 RJDBC

library(rJava)
library(RJDBC)

drv <- JDBC(driverClass="com.microsoft.sqlserver.jdbc.SQLServerDriver",
                  classPath="/home/****/sqljdbc_4.2/enu/jre8/sqljdbc42.jar")
conn <- dbConnect(drv, paste0("jdbc:sqlserver://",client.hostname),
                        user=client.username , password=client.password, dbname = client.dbName)

错误是

Error in .jcall(drv@jdrv, "Ljava/sql/Connection;", "connect", as.character(url)[1],  : 
  com.microsoft.sqlserver.jdbc.SQLServerException: The driver could not establish a secure connection to SQL Server by using Secure Sockets Layer (SSL) encryption. Error: "SQL Server did not return a response. The connection has been closed. ClientConnectionId:253fd8d2-8e60-40fb-96b0-220745818166".

Answer 1

当我将下面的代码用于连接到 MSSQLSERVER 时，我遇到了同样的错误

library(RODBC)
dbconnection <- odbcDriverConnect("Driver=SQL Server;Server=192.168.76.60; Database=kaggle;Uid=sa; Pwd=1234")

它扔给我

[unixODBC][Driver Manager]Can't open lib 'SQL Server' : file not found

为什么会抛出这个错误？ 答：当我们未能将正确的 ODBC 版本名称放在驱动程序值上时。

我们可以从哪里获得驱动程序 ODBC 版本名称

在“/etc”文件夹中你会发现“odbcinst.ini”文件打开它并检查版本名称

[ODBC Driver 17 for SQL Server]
Description=Microsoft ODBC Driver 17 for SQL Server
Driver=/opt/microsoft/msodbcsql17/lib64/libmsodbcsql-17.1.so.0.1
UsageCount=1

所以我从这里得到了 ODBC 驱动程序名称，它将是“用于 SQL Server 的 ODBC 驱动程序 17” 然后我修改我的连接字符串

library(RODBC)
dbconnection <- odbcDriverConnect("Driver=ODBC Driver 17 for SQL Server;Server=192.168.76.60; Database=kaggle;Uid=sa; Pwd=1234")

而且效果很好