Procedural logic, such as loops and if/else switches.

过程式逻辑，比如循环和 if/else 结构。

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Such functions are useful for performing complex or procedural logic.

执行复杂或程序逻辑时，这类函式便非常有用。

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The usage of SQL Table Functions allows you to push procedural logic into the FROM clause of a query.

sql表函数的使用使您可以将过程性逻辑放入到查询的from子句中。

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