Wednesday, June 22, 2011

Thursday, June 16, 2011

多db record 處理情況

今日試左兩個好多record 既database table,基本上一join 就會load 太長時間timeout
同埋用左好多以前無寫既野,好似
1. declare variable
2. temp table
@tmptable, @@tmptable, #tmptable 既分別

How to add sequence number within groups of repeating values

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