It was devised as a strategy plan in Europe and the US during World War II, and came to the fore as a field of applied mathematics after the war. It is a methodology for smoothly planning and executing problem-solving plans by theoretically and scientifically approaching problems that impede business, from analyzing the problem to finding a solution, planning and executing it, and managing it. It is used to improve know-how in business operations by facilitating analysis and decision-making. ⇒See also Operations Research One of the logical operators used in SQL language. It represents logical sum. For example, if you specify "English >= 80 OR Math >= 70" in the WHERE clause, you can extract data where English is 80 or above, or Math is 70 or above. SQLWHERE Clause Source: ASCII.jp Digital Dictionary About ASCII.jp Digital Dictionary Information |
第2次世界大戦中、欧米で作戦計画として考案され、戦後応用数学の一領域としてクローズアップされた。ある問題に対して、問題の分析から解決方法の発見と計画&実行、そしてその管理まで、事業などで障害となる問題に対して理論的・科学的にアプローチし、問題解決のための計画とその実行を円滑に行なうための方法論。分析と意志決定の円滑化を進めることで、事業の運営などのノウハウを高度化させるために利用される。⇒参照Operations Research⇒オペレーションズリサーチSQL言語で利用する論理演算子のひとつ。論理和を表す。たとえば、WHERE句に「英語 >= 80 OR 数学 >= 70」と指定すると、英語が80以上、または数学が70以上のデータを抽出できる。SQLWHERE句
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