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WITH RECURSIVE and MySQL
If you have been using certain DBMSs, or reading recent versions of the SQL standard, you are probably aware of the so-called “WITH clause” of SQL. Some call it Subquery Factoring. Others call it...
View ArticleFilesort optimization in 5.7.3: pack values in the sort buffer
In MySQL, filesort is the catch-all algorithm for producing sorted results for ORDER-BY or GROUP-BY queries. MySQL has two algorithms for filesort, both the original and the modified algorithms are...
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