Need PlSQL code to find out the column/combination of columns from a given table which will be unique values

Given a table with some columns and data associated with that. Need to find out a column or a combination of some columns, so that the values or combination of values will be unique in the table.
The table and number of columns and the columns will be dynamic.
Can you please help me with the solution?

f8d0dcea-cdf0-4935-8734-632fe021456c wrote:
No key is defined in the table.
Suppose a table contains 20 columns then I need the unique combinations of all columns.
Example: A table 'Employee' has 4 columns: Emp_No, Emp_Name,Passport_No,Emp_Designation. No key is defined for Employee table. Need to find out which column(single column and combination if columns) have unique values. Like, First check if Emp_No is unique then check Emp_No+Emp_Name is unique, then check if Emp_No+Emp_Name+Passport_No is unique, then check Emp_No+Emp_Name+Passport_No+Emp_Designation is unique.
Then again try with the combination of Emp_No+Passport_No and so on. In this way I need to find out all the combinations having unique values.
As Paul says, that will be a waste of time, as it will taken a lot of processing for all the possibilities, checking all the data each time to determine which combinations of columns provide uniqueness. What happens if someone inserts or deletes some data whilst your doing it?
You'd be quicker to manually look at the tables, and make an educated guess and then test for uniqueness with a quick query on that guess.

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Need PlSQL code to find out the column/combination of columns from a given table which will be unique values

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