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Published 20 hours ago • verified publisher icon yjhmelody
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Your CH does not use partition pruning. So CH reads data for all days.

``` CREATE TABLE IF NOT EXISTS taq_local ( `symbol` String, `date` Date, `time` DateTime, `bid` Float64, `ofr` Float64, `bidSiz` Int32, `ofrsiz` Int32, `mode` Int32, `ex` FixedString(1), `mmid` Nullable(String) ) ENGINE...

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