Join two Columns with different datatype

How to join two columns which is having different datatype? Say Coulmn1 with Varchar2 datatype and Coulmn2 with long datatype.

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PK

  • Feb 28th, 2012
 

You can join the columns with two different data types by using to_char, to_number to_date functions.
For e.g. one field is a varchar which stores number and other field is a number then you can use.
to_number(var_column) = number_column

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