Method and device for data query

Abstract

The invention discloses a method and a device for data query. One specific embodiment of the method comprises the following steps of receiving a data query request sent by a user terminal, wherein thedata query request comprises a user identifier, a field name and a data version number; determining whether target hierarchical data whose contained data identifier is matched with the user identifier and contained data version number is the same as the data version number contained in the data query request exists in a hierarchical data set, wherein the hierarchical data set is stored in a memory in advance, and each piece of hierarchical data set in the hierarchical data set is provided with the data identifier and the data version number; and in response to determining that the target hierarchical data exists in the hierarchical data set, determining data which is requested by the data query request and is related to a field indicated by the field name based on the target hierarchicaldata, and returning the data to the user terminal. According to the embodiments, the effectiveness of the data query is improved.

Description

technical field [0001] The present application relates to the field of computer technology, specifically to the field of Internet technology, and in particular to a method and device for querying data. Background technique [0002] Hierarchical data is data that includes multiple hierarchies (such as parent hierarchies, child hierarchies) and has a clear hierarchical structure. Hierarchical data may, for example, be data with a tree-like storage structure. For example, hierarchical data containing three levels for storing item information, the first level of the hierarchical data may include the category identification of the first-level category to which the item belongs, and the second level may include the category identification of each sub-category of the first-level category, The third level may include item identifiers of items belonging to each subcategory, and the third level is the last level of the hierarchical data. Here, the first level may be called the paren...

AI Technical Summary

Problems solved by technology

[0003] The data query system in the prior art usually queries the set or quantity of identifiers related to the identifier in the sub-level according to the identifier located in the parent layer, and usually does not consider whether the stored hierarchical data has expired, so as to return to the user Data may be outdated

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