Data Cleaning: Problems and Current Approaches

We classify data quality problems that are addressed by data cleaning and provide an overview of the main solution approaches. Data cleaning is especially required when integrating heterogeneous data sources and should be addressed together with schema-related data transformations. In data warehouses, data cleaning is a major part of the so-called ETL process. We also discuss current tool support for data cleaning

Analysis of the Lagging Time of Employment Structure in Vietnam

If any country’s or region's employment structure lags behind the industrial structure adjustment, which shows that the two structures are not developing in coordination. However, the deviation degree of structure is mainly the imbalance between industrial structure and employment structure. The lag refers to the degree to which the employment structure lags behind the industrial structure in the time dimension, and when the relationship between industrial structure and employment structure is measured in terms of time. Employment lags behind time over a long horizon which in turn causes serious unemployment, and affect industrial structure adjustment and upgrade. The study construct an analysis model for the lag time of the employment structure and provide findings that will resolve the incompatible state of the two structures, and promote the healthy development of industrial structure and employment structure in Vietnam. Through the research conclusion it is revealed that, after three years, the effects of industrial structure adjustment fully reflected the change of employment structure in Vietnam. Keywords: Lagging Time; Employment Structure; Vietna