What is ISNULL Function and What are Limitations of ISNULL Function - TSQL Tutorial

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What is ISNull and Limitations of ISNull Function in SQL Server - TSQL Tutorial
IsNull() is TSQL Function that we use to replace the Null value with desired value. We create different columns by using different data types in a table and often we define them to accept Null value. While we select the data from table/s for different purposes such as reports or in applications, we want to replace these Null values with some values as required.

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