21. NULLIF() Function in SQL Server | Explained with Real-Time Examples |
📌 Topics Covered
✔ What is the SQL Server NULLIF() function?
✔ NULLIF() syntax and return value
✔ Comparing integers, strings, and dates
✔ Preventing Divide-by-Zero errors using NULLIF()
✔ NULLIF() with employee salary examples
✔ Replacing invalid values with NULL
✔ Using NULLIF() inside CASE expressions
✔ Comparing two columns using NULLIF()
✔ Filtering records using NULLIF() in WHERE clause
✔ NULLIF() with COALESCE()
✔ NULLIF() with AVG() function
✔ Real-time SQL Server interview examples
⏱ Chapters
00:00 Introduction
00:14 What is NULLIF()?
00:44 NULLIF() Syntax
01:00 Basic Examples (Numbers, Strings & Dates)
02:55 Avoid Divide by Zero Errors
06:45 Remove Specific Values using NULLIF()
09:10 NULLIF() with CASE Expression
11:00 Compare Two Columns
12:05 NULLIF() inside WHERE Clause
14:00 NULLIF() with COALESCE()
19:00 NULLIF() with AVG()
19:40 Summary
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NULLIF(), COALESCE(), AVG(), where, CASE
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