Cross data source inquiry device and cross data source inquiry method
A technology across data sources and query devices, applied in the field of data query, can solve the problem of short construction cost and construction period
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[0027] In order to understand the above-mentioned purpose, features and advantages of the present invention more clearly, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.
[0028] In the following description, many specific details are set forth in order to fully understand the present invention, but the present invention can also be implemented in other ways different from those described here, therefore, the present invention is not limited to the specific embodiments disclosed below limit.
[0029] figure 1 A block diagram of an apparatus for querying across data sources according to an embodiment of the present invention is shown.
[0030] Such as figure 1As shown, the cross-data source query device 100 of the embodiment of the present invention includes: a main data source selection module 102, which selects a database from multiple databases as the main data source; a first query mod...
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