[R] R function question

Kai Yang y@ngk@|9999 @end|ng |rom y@hoo@com
Fri Jul 2 20:28:56 CEST 2021


Hello List,I need to generate summary report for many tables (>200 tables). For each table, I can use the script to generate repost:
res <- dbGetQuery(con, "SELECT * FROM BIODBX.MECCUNIQUE2")view(dfSummary(res), file = "W:/project/_Joe.B/MSSQL/try/summarytools.BIODBX.MECCUNIQUE2.html")rm(res)
BIODBX.MECCUNIQUE2 is the name of table.
I have all of tables' name in a data frame. So, I'm trying to write a function to do this:
summ <- function(Tabname){  res <- dbGetQuery(con, "SELECT * FROM Tabname")  view(dfSummary(res), file = "W:/project/_Joe.B/MSSQL/try/summarytools.Tabname.html")  rm(res)}
for (i in dbtable$Tot_table){  Tabname <- as.character(sqldf(sprintf("SELECT Tot_table FROM dbtable", i)))  summ(Tabname)}
1. I created  a function summ, the argument is Tabname. I put the Tabname in the function. I hope it can be replaced one by one2. the table dbtable contents all tables' name (>200 rows), the field name is Tot_table3. I want use "for" to establish a loop, which can automatic generate a summary report for each table
but I got error message below: Error: nanodbc/nanodbc.cpp:1655: 42000: [Microsoft][ODBC Driver 17 for SQL Server][SQL Server]Invalid object name 'Tabname'.  [Microsoft][ODBC Driver 17 for SQL Server][SQL Server]Statement(s) could not be prepared. <SQL> 'SELECT * FROM Tabname' 10. stop(structure(list(message = "nanodbc/nanodbc.cpp:1655: 42000: [Microsoft][ODBC Driver 17 for SQL Server][SQL Server]Invalid object name 'Tabname'.  [Microsoft][ODBC Driver 17 for SQL Server][SQL Server]Statement(s) could not be prepared. \n<SQL> 'SELECT * FROM Tabname'",     call = NULL, cppstack = NULL), class = c("odbc::odbc_error", "C++Error", "error", "condition"))) 9.new_result(connection using ptr, statement, immediate) 8.OdbcResult(connection = conn, statement = statement, params = params,     immediate = immediate) 7..local(conn, statement, ...) 6.dbSendQuery(conn, statement, params = params, ...) 5.dbSendQuery(conn, statement, params = params, ...) 4..local(conn, statement, ...) 3.dbGetQuery(con, "SELECT * FROM Tabname") 2.dbGetQuery(con, "SELECT * FROM Tabname") 1.summ(Tabname) 
it seems the tables' name is not successfully pass into query. can someone give me an instruction for this?
many thanks,Kai

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