20160511 GreenPlum9 索引

創建索引能夠提升查詢的速度：blog   普通查詢：索引 # create table lianxi2 as select * from lianxi1 distributed by(id); # select id,flag from lianxi2 where id=100;table   索引查詢：select # create index lianxi2_index on lianxi2(

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