Specialized on Data processing, Data management Implementation plan, Data Collection tools - electronic and paper base, Data cleaning specifications, Data extraction, Data transformation, Data load, Analytical Datasets, and Data analysis. BJ Data Tech Solutions teaches on design and developing Electronic Data Collection Tools using CSPro, and STATA commands for data manipulation. Setting up Data Management systems using modern data technologies such as Relational Databases, C#, PHP and Android.
| Username | Event time | How many events happened within a month after first one |
| A | 2019-05-03 | 2 |
| A | 2019-05-13 | |
| A | 2019-05-29 | |
| A | 2019-09-27 | |
| B | 2020-10-01 | 1 |
| B | 2020-10-18 | |
| B | 2020-11-9 | |
0 Response to Calculate the difference between dates of events and filter if the events happned within a month
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