Indirect excel functions to use Tables for validation or lookup or functions

 To count if a table has more than one of an entry in a column - as a CONDIITONAL FORMATTING:
=COUNTIF(INDIRECT("Table[ColID]"),INDIRECT("Table[@ColID]"))>1

Where 

  • INDIRECT is the function to return the range
  • "Table" is the named table reference
  • [ColID] is the reference column from the table
  • [@ColID] is the relative 0,0 CELL per iteration of the conditional formatting execution. 

For DATA VALIDATION (Lists) that grow with tables:
=INDIRECT("Table[TableColID]")
Where:

  • Table is the name of the data table
  • TableColID is a valid column form the table

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