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![SQL Basic] How to work with String Functions in SQL —My SQL CONCAT, LENGTH, SUBSTR | by SQLGate Global | SQLGate | Medium](https://miro.medium.com/v2/resize:fit:1400/1*krqNJJ1vfNFa6s7xYr2aSA.png "SQL Basic] How to work with String Functions in SQL —My SQL CONCAT, LENGTH, SUBSTR | by SQLGate Global | SQLGate | Medium")
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MySQL SUM Function
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MySQL SUM Function
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