问题
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有如下SQL语句: SELECT班级名称FROM班级表WHERE NOT EXISTS; (SELECT* FROM学生表WHERE
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Directions: Select the appropriate phrases from the answer choices below and match them to
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下列SELECT语句语法正确的是()。 A.SELECT*FROM’教师表’WHERE 性别=’男’ B.SELECT*FROM’教师表’W
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If I()the mayor of the city I would introduce sev
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Evaluate this SQL statement:SELECT ename sal 12* sal+100 FROM emp;The SAL column stores
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Examine the following commands and their output:SQL> SELECT ename sal FROM emp WHERE e
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