A、 Delete * From A WhereB='6'
B、 Delete From A Where B = '6'
C、 Delete A Where B = '6'
D、 Delete A Set B = '6'
答案:B
A、 Delete * From A WhereB='6'
B、 Delete From A Where B = '6'
C、 Delete A Where B = '6'
D、 Delete A Set B = '6'
答案:B
A. 标签传播法
B. Girvan-Newman算 法
C. kNN算法
D. 派系过滤CPM算法
A. 超级管理员
B. 平台管理员
C. 项目管理员
D. 分析用户
A. Echarts
B. Matplotlib
C. Seaborn
D. NumPy
A. A.递归特征消除
B. B.移除低方差的特征
C. C.单变量特征选择
D. D.SelectFromModel选择特征
解析:过滤法是特征选择重要的方法之一,具体包括:移除低方差的特征和单变量特征选择。
A. HASH BY column_name
B. DISTRIBUTED BY column_name
C. DISTRIBUTING BY column_name
D. HASHED BY column_name
A. ALL
B. DISTINCT
C. HAVING
D. NULL
A. 包括40岁和50岁
B. 不包括40岁和50 岁
C. 包括40岁但不包 括50岁
D. 包括50岁但不包 括40岁