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Structured query language table merging

机译:结构化查询语言表合并

摘要

A method of modifying a Structured Query Language (SQL) statement in order to reduce the number of joins executed by a database is disclosed. The method includes presenting the SQL statement to the database and identifying joins in the SQL statement for removal in accordance with one or more predetermined criteria. For each identified join, the SQL statement may be modified so as to remove the identified join and to change references to a first instance of a table which is referred to by the identified join to a second instance of the table.
机译:公开了一种修改结构化查询语言(SQL)语句以减少由数据库执行的联接的数量的方法。该方法包括将SQL语句呈现给数据库,并根据一个或多个预定标准识别SQL语句中的联接以将其删除。对于每个识别出的联接,可以修改SQL语句,以便去除识别出的联接并且将对表的第一实例的引用改变为由识别出的联接所引用的表的第二实例。

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