Question

我有以下SQL查询，我通过RODBC提交给SQL Server

test = "SELECT ticker, date, PX_LAST FROM dbo.bb_si_ts_data_lc
            WHERE ticker = 'SPX Index' AND date > '2014-12-31'"
ts_db_monthly = sqlQuery(conn_db,test)

这完全没问题。

现在我尝试参数化查询

date_input_start = paste("2014-12-31")
date_sql_start = paste("AND date>= (\"",date_input_start,"\")")
ticker_input = 'SPX Index'
ticker_sql_input = paste("WHERE ticker IN(\"",ticker_input,"\")")
fields_input = c("ticker","date","PX_LAST")
db = "dbo.bb_si_ts_data_lc"
query_test = paste("SELECT ticker,date,PX_LAST FROM",db,ticker_sql_input,date_sql_start)
ts_db_monthly_test = sqlQuery(conn_db,query_test)

然而，这不起作用。我得到的错误信息是：

[1] "42S22 207 [Microsoft][ODBC SQL Server Driver][SQL Server]Invalid column name ' SPX Index '."                                                                 
[2] "42S22 207 [Microsoft][ODBC SQL Server Driver][SQL Server]Invalid column name ' 2014-12-31 '."                                                                
[3] "[RODBC] ERROR: Could not SQLExecDirect 'SELECT ticker,date,PX_LAST FROM dbo.bb_si_ts_data_lc WHERE ticker IN(\" SPX Index \") AND date>= (\" 2014-12-31 \")'"

你能帮我解决这个问题吗？在我看来，问题围绕引号。

Answer 1

使用单引号，而不是双引号。

但您应该使用问号来指示您的参数并分别传递参数。试试这篇文章来帮助：http://cran.r-project.org/web/packages/RODBCext/vignettes/Parameterized_SQL_queries.html

使用ODBC的参数化SQL查询

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