STRINGTONUMBER (NoSQL query)

The STRINGTONUMBER function converts a string expression to a number.

The STRINGTONUMBER function converts a string expression to a number in Azure Cosmos DB for NoSQL.

Syntax

STRINGTONUMBER(<string_expr>)

Arguments

Return types

Returns a number value.

Examples

This section contains examples of how to use this query language construct.

Convert string to number

In this example, the STRINGTONUMBER function is used to convert various string expressions to numbers.

SELECT VALUE {
  parseIntegerString: STRINGTONUMBER("100"),
  parseDecimalString: STRINGTONUMBER("3.14"),
  parseWithWhitespace: STRINGTONUMBER("   60   "),
  parseScientific: STRINGTONUMBER("-1.79769e+308"),
  parseInvalid: STRINGTONUMBER("Hello"),
  parseUndefined: STRINGTONUMBER(undefined),
  parseNull: STRINGTONUMBER(null),
  parseNaN: STRINGTONUMBER(NaN),
  parseInfinity: STRINGTONUMBER(Infinity)
}

[
  {
    "parseIntegerString": 100,
    "parseDecimalString": 3.14,
    "parseWithWhitespace": 60,
    "parseScientific": -1.79769e+308
  }
]

Remarks

• This function doesn't utilize the index.
• String expressions are parsed as a JSON number expression.
• Numbers in JSON must be an integer or a floating point.
• If the expression can't be converted, the function returns undefined.