create table s_tmp as select * from Statistic where 1=2; 这个w
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create table s_tmp as select * from Statistic where 1=2; 这个where1=2是什么意思呢
where 1=2 永远不成立;
所以 select * from statistic from where 1=2 的结果是个空集合,只返回statistic的字段.
所以 select * from statistic from where 1=2 的结果是个空集合,只返回statistic的字段.
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