RODBC-sql保存日期

Question

I use RODBC to connect to a Filemaker database and read/write data.

I currently fail at writing a date to my database with this code:

sqlQuery(db, "INSERT INTO mytable (a,c) VALUES (98,'01-01-2017')")

R then thows an error: Incompatible types in assignment.

It works when I reformat column c in the database to 'decimal' and write two numeric values, so I'm pretty sure the only problem is the format of the date. I tried several arrangements of the data (such as 2017-01-01 , 2017/01/01 , quoting it and so on). My database takes the data format dd-mm-yyyy if I just enter the data manually, so that's not the problem.

Any suggestions?

Answer 1

I just found this FileMaker documentation stating

ExecuteSQL accepts only the SQL-92 syntax ISO date and time formats with no braces. ExecuteSQL does not accept the ODBC/JDBC format date, time, and timestamp constants in braces.

And - even more important! - this:

To apply the correct formatting to dates in an SQL query, use the DATE statement. If you do not use the DATE statement, ExecuteSQL treats dates as literal strings

No matter what you are writing, it is taken as a string...