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Data comparison method and device

A data comparison and data technology, applied in the computer field, can solve problems such as inability to accurately reflect data consistency

Inactive Publication Date: 2016-10-05
ALIBABA GRP HLDG LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] However, comparing the data in the two data tables with the above method of statistical analysis cannot accurately reflect the consistency of the data in the two data tables

Method used

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Embodiment Construction

[0111] In order to enable those skilled in the art to better understand the technical solutions in the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described The embodiments are only some of the embodiments of the present application, but not all of them. Based on the embodiments in this application, all other embodiments obtained by persons of ordinary skill in the art without creative efforts shall fall within the scope of protection of this application.

[0112] In the description of this application:

[0113] A field generally refers to a column in a data table. In a data table, each column is generally called a field.

[0114] A record generally refers to a row in a data table. In a data table, each row is generally called a record.

[0115] Such as figure 1 As shown, a data compari...

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Abstract

Embodiments of the invention disclose a data comparison method and device. The method comprises the following steps: acquiring a first data table and a second data table; selecting fields shared by the first data table and the second data table; comparing each data, recording the shared fields, of the first data table with data, recording the shared fields, of the second data table, so as to detect whether difference data exists between the first data table and the second data table or not; and judging whether data in the first data table is consistent with data in the second data table according to the detection result. The data comparison method and device can be used for correctly judging whether data in different data tables is consistent or not.

Description

technical field [0001] The present application relates to the field of computer technology, in particular to a data comparison method and device. Background technique [0002] With the increasing Internet data, the amount of data in the data table is gradually increasing. At present, the data amount of a data table may reach TB (Terabyte) and PB (Petabyte, petabyte) levels. In some cases, it is necessary to migrate a large amount of data from one data table to another data table. Massive data is prone to errors during the migration process, such as loss of some data or errors in the value of some data. Therefore, after data migration, it is necessary to compare the data in the two data tables to ensure that the data before and after migration are consistent. [0003] In the prior art, a statistical analysis method is usually used to compare the data in the two data tables. For example, count the average values ​​of the same field data in two data tables (may also be the m...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/30
Inventor 曲丹鹤
Owner ALIBABA GRP HLDG LTD