問題詳情
34)”教师表”中又“职工号”、“姓名”、“工龄”和“系号”等字段，“学院表”中又“系名”和“系号”等字段，计算机 系教师总数的命令是
(A)SELECT COUNT(*)FROM 教师表 INNER JOIN 学院表ON 教师表系号=学院表系号 WHERE 系名=“计算机”
(B)SELECT COUNT(*)FROM 教师表 INNER JOIN 学院表ON 教师表系号=学院表系号 ORDER BY 教师表系号；HAVING 学院表，系名=“计算机”
(C)SELECT COUNT(*)FROM 教师表 INNER JOIN 学院表ON 教师表系号=学院表系号 GROUP BY 教师表系号；HAVING 学院表系名=“计算机”
(D)SELECT COUNT(*)FROM 教师表 INNER JOIN 学院表ON 教师表系号=学院表系号 WHERE 系名=“计算机”HAVING 学院表，系名=“计算机”
(A)SELECT COUNT(*)FROM 教师表 INNER JOIN 学院表ON 教师表系号=学院表系号 WHERE 系名=“计算机”
(B)SELECT COUNT(*)FROM 教师表 INNER JOIN 学院表ON 教师表系号=学院表系号 ORDER BY 教师表系号；HAVING 学院表，系名=“计算机”
(C)SELECT COUNT(*)FROM 教师表 INNER JOIN 学院表ON 教师表系号=学院表系号 GROUP BY 教师表系号；HAVING 学院表系名=“计算机”
(D)SELECT COUNT(*)FROM 教师表 INNER JOIN 学院表ON 教师表系号=学院表系号 WHERE 系名=“计算机”HAVING 学院表，系名=“计算机”
參考答案
答案：A
難度：適中0.5
統計：A(0),B(0),C(0),D(0),E(0)
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