SQL | Null Function in SQL | ISNULL | COALESCE | IFNULL | NVL
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SQL | Null Function in SQL | ISNULL | COALESCE | IFNULL | NVL
In this video we see the different NULL functions in SQL and see, when and how to use the NULL functions. A field with a NULL value is a field with no value. If a field in a table is optional, it is possible to insert a new record or update a record without adding a value to this field. Then, the field will be saved with a NULL value. Note: A ...
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