BulkUpdate Locks: Used when bulk-copying data into a table and the TABLOCK hint is specified.
大容量更新锁：在向表进行大容量数据复制且指定了TABLOCK提示时使用。
2
UpdateError is thrown by the bulkupdate methods if one or more of the documents are not updated successfully.
UpdateError在未成功更新一个或多个文档时由bulk更新方法抛出。
3
If updates to the coordinate columns are possible, you may still be able to avoid bulk copies if the source table contains a time stamp column that records the time of last update for each row.