Oracle XE is limited to: only use one core of CPU on a system use up to 1GB of RAM store up to 4GB of data, 11GB of data on 11.2
The following database features are not supported: partitioned objects internal Java virtual machine (JVM) materialized view query rewrite changing character set on 11.2 (only AL32UTF8)
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XE版本的限制还是比较多，请确认下面的限制条件是否能满足业务需求。
Oracle XE is limited to:
only use one core of CPU on a system
use up to 1GB of RAM
store up to 4GB of data, 11GB of data on 11.2
The following database features are not supported:
partitioned objects
internal Java virtual machine (JVM)
materialized view query rewrite
changing character set on 11.2 (only AL32UTF8)