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每日练习:大数据ACP认证考试真题
(单选题)DRDS中的表T的分库分表键分别为col1和col2,则下列语句中哪个不会进行全表扫描?
- select* from T where col1=1 or col2=2
- select* from T where col2=2
- select* from T where col1=1
- select* from T where col1=1 and col2=2
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真题解析:答案及ACP真题解析
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答案: D
数据分析:本ACP真题答题统计
select* from T where col1=1 or col2=2 |
1 / 25% answers |
select* from T where col2=2 |
0 / 0% answers |
select* from T where col1=1 |
0 / 0% answers |
select* from T where col1=1 and col2=2 |
3 / 75% answers |