Category: PostgreSQL
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How Can I Fill Sequential NULL Values in a PostgreSQL Table Using the Previous Not-NULL Value?
When working with datasets in PostgreSQL, particularly in handling transaction records or time series data, it’s quite common to encounter missing values (NULLs) in your data. In some scenarios, to maintain data integrity or for specific analytical needs, you might need to replace these NULLs with the most recent non-NULL value within the dataset. Let’s…
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How Can I Automate a Quarterly Date Range in SQL for Trailing 12-Month Analysis?
Over time, I’ve encountered various challenges when working with time-dependent data, especially reports that require rolling date ranges such as trailing 12 months. A common scenario is updating these ranges quarterly, as described in the question above. Let’s explore how we can automate this process using SQL without hardcoding specific dates, ensuring our reports stay…