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The NULLIF function in T-SQL returns NULL if two expressions are equal; otherwise, it returns the first expression.
This is often used to prevent divide-by-zero…

Use NULLIF to avoid divide by zero error in T-SQL

The NULLIF function in T-SQL returns NULL if two expressions are equal; otherwise, it returns the first expression.
This is often used to prevent divide-by-zero errors or to…

1. Two Sum

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