Guides/ReportDesign/15.0-Expressions-in-Izenda.md
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- **count(OrderID)** produces a count of all OrderID values.
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-- **distinct(OrderID)** produces a list of all distinct OrderID values.
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+- **count(Distinct [OrderID])** produces a count of all distinct OrderID values.
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+- **distinct(OrderID)** produces a list of all distinct OrderID values. This is an _**Oracle only**_ function.
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- **isnull(OrderID, x)** checks to see if there is a null value in OrderID and replaces it with ‘x’.
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-- **length(OrderID)** returns the length of a string. Length is used with an Oracle db. If you’re using SQL, see len(OrderID).
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+- **length(OrderID)** returns the length of a string. Length is used with an Oracle db. _**If you’re using SQL, see len(OrderID)**_.
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-- **len(OrderID)** returns the length of a string. Len is used with a SQL db. If you’re using Oracle, see length(OrderID).
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+- **len(OrderID)** returns the length of a string. Len is used with a SQL db. _**If you’re using Oracle, see length(OrderID)**_.
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- **max(OrderID)** produces the maximum OrderID value within a given range.
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