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USER_DIM_JOIN_KEY
Representation of a join between two dimension tables.Columns
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   OWNER
      Owner of the dimension
   DIMENSION_NAME
      Name of the dimension
   DIM_KEY_ID
      Join key ID (unique within a dimension)
   LEVEL_NAME
      Name of the hierarchy level
   KEY_POSITION
      Position of the key column within the level
   HIERARCHY_NAME
      Name of the hierarchy
   CHILD_JOIN_COLUMN
      Name of the join column
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