目录 Supervised ML and Sentiment AnalysisSupervised ML (training)Sentiment analysis Vocabulary and Feature ExtractionVocabularyFeature extractionSparse representations and some of their issues Negative and Positive FrequenciesFeature extraction with freque…
什么是事务
要么都成功,要么都失败
一一一一一一一
1. SQL执行:A给B转账 A 1000 ---->200 B 200
2. SQL执行:B收到A的钱 A 800 B 400
一一一一一一一
将一组SQL放在一个批次中去执行~ 事务原则:ACI…