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Meaning of the Symbol @@ in SQL Server

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故里飘歌
故里飘歌 2021-02-20 07:13

What is the meaning of the symbol @@ in SQL Server?

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  • 一个人的身影
    2021-02-20 07:37

    In SQL Server, symbol @@ is prefixed to global variables.

    The server maintains all the global variables. We cannot declare them.

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  • 暖寄归人
    2021-02-20 07:41

    Global variable names begin with a @@ prefix. You do not need to declare them, since the server constantly maintains them. They are system-defined functions and you cannot declare them.

    See Reference Here

    enter image description here

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