Below, we will use the example of orders and order details tables to compare the performance of esProc SPL and MySQL in calculating EXISTS and NOT EXISTS for primary-subtable joins.

Only a select few researchers have the skills for the hottest area in tech. Mark Zuckerberg and his rivals want to hire them—even if it takes pay packages of $100 million.

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The development of cloud computing needs to continuously improve and perfect the privacy-preserving techniques for the user’s confidential data. Multi-user join query, as an important method of data ...