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Improve MySQL performance with indices and Explain.

Enabling profiling is an affordable way to get an accurate estimate of the time the request has been executed. First you need to enable profiling and …

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SQL in just 20 minutes.

    Every self-respecting web developer should know SQL.

    Although it has existed since the 70s of last century, it is still very widely used, and wit…

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    Oracle ROUND function (FOR DATE).

    The Oracle/PLSQL ROUND function returns a date rounded to a specific unit….

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    Oracle TO_DATE function.

      The Oracle/PLSQL TO_DATE function converts a string into a date….

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      Oracle Comments.

        Did you know that you can put comments into SQL statements in Oracle? Comments can appear in one line or be distributed over several lines. Let’s see …

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