因该区采暖用户高差悬殊较大而不得不采用分区定压直接连网新技术。
Because of large difference in elevation in this district a new technology as setting pressure as zone with direct networking is adopted.
数据中的模式：对于特定的表空间或分区，数据中重复出现的模式的出现频率将决定压缩的效果。
Patterns in the data: the frequency of recurring patterns in the data determines how effective compression will be for a particular table space or partition.
你可以为表空间，表或者一个分区指定压缩。如果指定为表空间基本，那么该表空间所有表创建后默认都启用压缩。
You can specify compression for a tablespace, a table, or a partition. If specified at the tablespace level, then all tables created in that tablespace are compressed by default.
你可以为表空间，表或者分区指定压缩属性。如果你为表空间指定了压缩属性，那么在该表空间下建的表会默认的继承压缩属性。
You can specify compression for a tablespace, a table, or a partition. If specified at the tablespace level, then all tables created in that tablespace are compressed by default.
你可以为表空间，表或者分区指定压缩属性。如果你为表空间指定了压缩属性，那么在该表空间下建的表会默认的继承压缩属性。
You can specify compression for a tablespace, a table, or a partition. If specified at the tablespace level, then all tables created in that tablespace are compressed by default.
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