Used to release array variables and deallocate the memory used for their elements.
用来释放数组变量和解除分配用于它们的元素的内存。
To delete rows in a heap and deallocate pages, use one of the following methods.
若要删除堆中的行并释放页，请使用下列方法之一。
This decreases the contention between concurrent tasks having to allocate or deallocate pages.
这将减少需要分配页或释放页的并发任务之间的争用。
The DEALLOCATE statement releases the resources used by the cursor.
DEALLOCATE语句释放游标所使用的资源。
In general, value types are cheaper to allocate and deallocate.
通常，值类型的分配和释放开销更小。
Allocate and deallocate memory space as needed.
需要时分配和收回存储空间。
You can use this method to deallocate memory.
一样，您可以使用此方法取消内存的分配。
For example, the class may deallocate the data structure that holds the commands in the batch.
例如，类可以释放保存批处理中的命令的数据结构。
You can use this opportunity to do some cleanup such as deallocate memory and so on.
你能利用这个机会做一些清理工作。例如：释放内存等等。
DEALLOCATE failure: ALLOCATABLE array is not ALLOCATED
释放没有被分配的数组
To deallocate an extent, the Database Engine makes sure that the GAM bit is set to 1 and the SGAM bit is set to 0.
若要释放区，数据库引擎确保将GAM位设置为1，将SGAM位设置为0。
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