20160511 GreenPlum9 索引

创建索引能够提升查询的速度：blog   普通查询：索引 # create table lianxi2 as select * from lianxi1 distributed by(id); # select id,flag from lianxi2 where id=100;table   索引查询：select # create index lianxi2_index on lianxi2(

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