Given the number of INSERT, UPDATE, and DELETE operations and changes in data distributions, you need to collect the right statistics regularly and with minimum resource consumption.

您需要根据INSERT、UPDATE和DELETE操作的数目和数据分布的变化，在资源消耗尽量少的情况下定期收集正确的统计数据。

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In most cases, well-suited SQL statements are very simple SELECT statements that reference only a single table or are INSERT, UPDATE, and DELETE (UID) operations that are executed many times.

在大多数情况下，非常适合使用参数标记的sql语句要么是非常简单的SELECT语句(只引用一个表)，要么是被多次执行的INSERT、UPDATE和DELETE (uid)操作。

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You can also perform INSERT, UPDATE, and DELETE operations for relational nicknames, but not for non-relational nicknames.

对于关系昵称，也可以执行INSERT、UPDATE和DELETE操作，但是对于非关系昵称不可以执行这些操作。

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