Question

我在R中写入一个数据帧到Microsoft SQL服务器表，看到下面的错误。我已经要求将记录插入此表dbo.temp2的权限，但它失败并出现此错误。 Dataframe和Table中的列数匹配。

dbWriteTable2(connDBI,"dbo.temp2",test.df1,append=TRUE,overwrite=FALSE,row.names=FALSE,add.id=TRUE)
Error: <SQL> 'SELECT id FROM dbo.temp2 ORDER BY id DESC LIMIT 1'
  nanodbc/nanodbc.cpp:1587: 42000: [Microsoft][ODBC SQL Server Driver][SQL Server]Incorrect syntax near 'LIMIT'

还尝试使用DBI包中的函数dbWriteTable，即使使用append=TRUE选项，它也会因创建表错误而失败。

Answer 1

我可以通过一些在线研究和使用RMySQL包来解决这个问题。

以下是解决此问题的R代码行，现在可以将Dataframe写入SQL数据库表。

    Traceback (most recent call last):
    File "/home/Documents/project/.env/bin/scrapy", line 11, in <module>
       sys.exit(execute())
    File "/home/Documents/project/.env/local/lib/python2.7/site-packages/scrapy/cmdline.py", line 141, in execute
       cmd.crawler_process = CrawlerProcess(settings)
    File "/home/Documents/project/.env/local/lib/python2.7/site-packages/scrapy/crawler.py", line 238, in __init__
       super(CrawlerProcess, self).__init__(settings)
    File "/home/Documents/project/.env/local/lib/python2.7/site-packages/scrapy/crawler.py", line 129, in __init__
       self.spider_loader = _get_spider_loader(settings)
    File "/home/Documents/project/.env/local/lib/python2.7/site-packages/scrapy/crawler.py", line 325, in _get_spider_loader
       return loader_cls.from_settings(settings.frozencopy())
    File "/home/Documents/project/.env/local/lib/python2.7/site-packages/scrapy/spiderloader.py", line 33, in from_settings
       return cls(settings)
    File "/home/Documents/project/.env/local/lib/python2.7/site-packages/scrapy/spiderloader.py", line 20, in __init__
       self._load_all_spiders()
    File "/home/Documents/project/.env/local/lib/python2.7/site-packages/scrapy/spiderloader.py", line 28, in _load_all_spiders
       for module in walk_modules(name):
    File "/home/Documents/project/.env/local/lib/python2.7/site-packages/scrapy/utils/misc.py", line 71, in walk_modules
       submod = import_module(fullpath)
    File "/usr/lib/python2.7/importlib/__init__.py", line 37, in import_module
       __import__(name)
    File "/home/Documents/project/scrapers/scrapy/spiders/my_spider_with_syntax_error.py", line 14
       def parse(self response):
                     ^
    SyntaxError: invalid syntax

在SQL Server表中编写R Dataframe时出错

1 个答案: