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4 dni temu · NULLIF NULLIF(expr, expr_to_match) Description. Returns NULL if expr = expr_to_match evaluates to TRUE, otherwise returns expr. expr and expr_to_match must be implicitly coercible to a...
27 wrz 2024 · IFNULL () allows to return the first value if the value is NULL; otherwise, the second value is returned. COALESCE () is a function that returns the first non-null value in a set of arguments. NVL () can be used to replace a NULL value with a value specified by the user.
20 lip 2024 · BigQuery provides the following exclusive functions to deal with null values: IFNULL (first_expression, second_expression) This function prioritizes non-null values. It checks the first...
1 kwi 2018 · This is my BigQuery Standard SQL query: SELECT key, value.string_value as stringColumn, value.int_value as integerColumn, IFNULL(value.string_value, value.int_value) as singleValueColumn FROM `com_skytracking_ANDROID.app_events_*`, UNNEST(event_dim) as event, UNNEST(event.params) as event_param WHERE event.name = "order_event"
31 maj 2024 · NULLIF: This function compares two expressions and returns null if they are equal; otherwise, returns the first expression. It's used to explicitly convert specific values to null, often to avoid division by zero or to filter out unwanted data through subsequent processing.
25 mar 2024 · What are they and when to use them? - IFNULL tests a column for the NULL value, returning the original value if it is NOT NULL and the second value we provide otherwise. The two columns need to be coercible to the same datatype. It's works like ISNULL in SQL Server.
NULLIF. The NULLIF function is used to compare two expressions. If the expressions are equal, it returns NULL, otherwise, it returns the first expression.
