How can I find what is the data type of a column of a Table in oracle or SQL?

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• How to recover the data type of a column in a table?

  Hello
  
  I want to retrieve the data type of a column in a table. At the moment I'm querying attribute 'OCI_ATTR_DATA_TYPE', but it is SQLT_CHR varchar2 and nvarchar2 data type columns. I need to make a distinction between these columns of two separate data types. Y at - it all API through which I could get the exact data type of a column, i.e. "nvarchar2?
  
  Thanks in advance.
  
  Hashim

  Hello

  It is not a very direct way to do it. What you can do is to call OCIDescribeAny on the table that you want to get information. You can then get the OCI_ATTR_CHARSET_FORM attribute for the column. If the value of the attribute that you get is SQLCS_IMPLICIT, that would mean its a varchar/char/varchar2 column regular. If you get SQLCS_NCHAR, this means that the column is NCHAR. You can get the example of it here:

  http://download.Oracle.com/docs/CD/B14117_01/AppDev.101/b10779/oci06des.htm#446491

  Just look for the section "Recovering for a Table column Datatypes".

  Thank you
  Sumit

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