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Aggregate functions help turn large datasets into simple summaries used across many fields. GROUP BY and HAVING allow structured grouping and filtering of data for clearer reports. Functions like ...

Unlock the full InfoQ experience by logging in! Stay updated with your favorite authors and topics, engage with content, and download exclusive resources. Dany Lepage discusses the architectural ...

Learn how to use MID() and FIND() and then combine them to parse substrings from inconsistent data. Parsing data is a common task in Excel. For the most part, you’ll do so when you need to work with ...

I have a column of data with values resembling this: HL7_Result_for_Message_ID_123Q324343.hl7 I need to grab that ID number (in bold), the challenge being that it can be any and all lengths. I have ...

Window functions are a new feature in MySQL 8. Window functions are not as simple as the other built-in MySQL functions. While most functions operate only on the data pertaining to a single row of ...

Function (Fn) keys – F1, F2, F3, etc., come in handy for those who are in dire need of shortcuts on their keyboards. Laptops are usually equipped with such keys but desktop keyboards, especially the ...