SQL Null Functions - ISNULL, IFNULL, Combine, & NULLIF ...
a. SQL ISNULL() The SQL ISNULL work has distinctive uses in SQL Server and MySQL. In SQL Server, ISNULL() work is used to supplant NULL qualities. The syntax of SQL ISNULL – SELECT column(s), ISNULL(column_name, value_to_replace) FROM table_name; Example of SQL ISNULL – Consider the accompanying Employee table,
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