結果 : check if variable is not null in sql server

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28 SQL Server - SQL Null Function to check value of column is null or not

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𝗚𝗲𝗻𝗲𝗿𝗮𝘁𝗲 𝗦𝗤𝗟 𝗳𝗿𝗼𝗺 𝗡𝗮𝘁𝘂𝗿𝗮𝗹 𝗟𝗮𝗻𝗴𝘂𝗮𝗴𝗲 - 𝗕𝗲𝗴𝗶𝗻𝗻𝗲𝗿-𝗙𝗿𝗶𝗲𝗻𝗱𝗹𝘆 𝗚𝗲𝗻 𝗔𝗜 𝗣𝗿𝗼𝗷𝗲𝗰𝘁 𝘄𝗶𝘁𝗵 𝗚𝗶𝘁𝗛𝘂𝗯 𝗖𝗼𝗱𝗲!

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SQL Interview Question- What is NULL | NOT NULL constraint in SQL Server?

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