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MAX (NoSQL query)

  • Статия

APPLIES TO: NoSQL

Returns the maximum of the values in the expression.

Syntax

MAX(<scalar_expr>)

Arguments

Description
scalar_expr A scalar expression.

Return types

Returns a numeric scalar value.

Examples

This example uses a container with multiple items that each have a /price numeric field.

[
  {
    "price": 71.76,
    "name": "Iroowl bracelet",
    "category": "activity-bracelet"
  },
  {
    "price": 27.07,
    "name": "Icenty bracelet",
    "category": "activity-bracelet"
  }
]

For this example, the MAX function is used in a query that includes the numeric field that was mentioned.

SELECT
    MAX(p.price) AS maxPrice
FROM 
    products p
WHERE
    p.category = "activity-bracelet"

[
  {
    "maxPrice": 71.76
  }
]

Remarks

  • This function benefits from a range index.
  • The arguments in MAX can be number, string, boolean, or null.
  • Any undefined values are ignored.
  • The following priority order is used (in descending order), when comparing different types of data:
    1. string
    2. number
    3. boolean
    4. null

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