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把not in 改成not exists后的優化 近期，OA數據庫里面存在一條慢SQL，其執行時間為3分16秒。這條慢SQL語句每個月可能會運行幾次，但其
Enterprise Java Beans 3.1: EJB components can live in the web tier. Package/deploy EJB components in
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隨著Oracle 12c推出了in memory組件，使得Oracle數據庫具有了雙模式數據存放方式，從而能夠實現對混合類型應用的支持：傳統的以行形式保存的數據滿足OLTP應用；列形式保存的數據滿足
8、Understanding Java persistenceThis chapter covers■ Managing entities■ Using transactions■ Choosing
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1.OLD: SELECT card.c_cust_id, card.TYPE, card.n_all_money FROM ca
本節介紹了PostgreSQ
MYSQLDUMP TABLE IN SQL FORMAT 1.What is mysqldump ? mysqldump is a sql based dump, data is dumped
