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v4.0
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    中文EN
    v4.0

      max() | Maximum Value

      Parameters, Value

      Maximum value function finds the greatest value of a column of data. It only keeps the data column as well as its homologous columns after aggregation, and it abandons other columns.

      Syntax:

      • Format: max(<column>)
      • Parameters: see table below
      • Value: ATTR ( number, time, string )
      Name Category Specification Description
      <column> NODE,EDGE,PATH,ATTR,ARRAY,TABLE / The column to be aggregated

      The value of <column> with different categories in every row:

      Type Value
      NODE Node's UUID in the row
      EDGE Edge's UUID in the row
      PATH ROW INDEX(starts from 0)in the row
      ATTR ATTR's value in the row
      ARRAY The value of the 1st element in the array of the row
      TABLE ROW INDEX(starts from 0)in the row

      ATTR (Numeric value)

      Example: find the outbound 1-step paths from Card CA001, find the biggest amount of money transferred

      n({_id == "CA001"}).re({@transfer} as pay).n({@card})
      return max(pay.amount)
      

      ATTR (String)

      Example: find the outbound 1-step paths from Card CA001, find the biggest payee cards' ID

      n({_id == "CA001"}).re({@transfer}).n({@card} as payee)
      return max(payee._id)
      

      ATTR (time)

      Example: find the outbound 1-step paths from Card CA001, find the minimum value of transfer time

      n({_id == "CA001"}).re({@transfer} as pay).n({@card})
      return max(pay.time)
      
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