评估应在where子句中选择哪个列

Question

我有一个名为Employee的表，其中包含以下列

    || Id || Employee_Name || Address
    =================================
    || 1  || Name1         || Add1
    || 2  || Name2         || Add2

    select <column_name> from Employee 
    where column_name = 'ID';

结果应该如下

    Id
    ===
    1
    2

Answer 1

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