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Oracle EXTRACT function.

The Oracle/PLSQL EXTRACT function extracts a value from a date or interval value….

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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 NEXT_DAY function.

Oracle/PLSQL NEXT_DAY function returns the first day of the week that is larger than date….

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Oracle LAST_DAY function.

Oracle/PLSQL LAST_DAY function returns the last day of the month based on the date value….

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Oracle TRUNC function (FOR DATE).

The Oracle/PLSQL TRUNC function returns a date truncated to a specific unit….

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