Categories:: Data metric functions

INVALID_ISIN_PERCENT (system data metric function)¶

Returns the percentage of column values that are not an ISIN: two uppercase letters, nine uppercase letters or digits, and a trailing digit. The percentage is computed over the total row count, including NULL values in the denominator.

This topic provides the syntax for calling the function directly. To learn how to associate the function with a table or view so it runs at regular intervals, see Associate a DMF.

Syntax¶

SNOWFLAKE.CORE.INVALID_ISIN_PERCENT(<query>)

Arguments¶

query: Specifies a SQL query that projects a single column.

Allowed data types¶

The column projected by the query must have the VARCHAR data type.

Returns¶

The function returns a FLOAT value.

Usage notes¶

The function checks the format only; it does not validate the check digit.

Example¶

Measure the percentage of invalid ISINs in the isin column:

SELECT SNOWFLAKE.CORE.INVALID_ISIN_PERCENT(
  SELECT
    isin
  FROM finance.tables.securities
);