joint cost of operation 中文意思是什麼

joint cost of operation 解釋
聯合經營成本
  • joint : n 1 接合,榫接合處,接合點。2 【解剖學】關節。3 【植物;植物學】節。4 【電學】接頭。5 【建築】接...
  • cost : n 1 費用;代價,價格;成本。2 犧牲;損害,損失。3 〈pl 〉訟費。vt (cost; cost)1 值,要價(苦幹...
  • of : OF =Old French 古法語。
  • operation : n 1 動作,行動,活動;業務,工作;作用。2 效果,效力;有效范圍,有效期間。4 【數學】運算;【醫學...
  1. Many mature technologies on this level have been brought out, such as the relational algebra law, the improved logical query plan, the cost estimation of operation, the selective plan based on cost and order of joint, etc. although many methods have been tried out, no remarkable result or noteworthy technology has come to reality because of complexity of data decomposition and network effects

    例如,從物理查詢計劃的底層磁盤輸入輸出到語法分析階段的語法分析樹、用於改進查詢計劃的代數定律、邏輯查詢計劃的改進,以及操作代價的估計、基於代價的計劃和連接順序的選擇等全過程,都進行了不懈的努力。在這方面的研究已經非常成熟。
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