Renamed 15 dot 4 Expression Functions to /FAQ/UserGuides/15.4 Expression Functions

-#15.4 Expression Functions

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-### Functions

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-As you may have noticed, we can use some aggregate functions in expressions. In order to prevent SQL injection, only a limited set of SQL functions are turned on by default.

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-- avg(OrderID) produces the average of all OrderID values.

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-- cast(OrderID, AS DATATYPE) ``e.g. "cast([OrderID] as varchar)"`` Converts a value from one data type to another. This should only be done when you do not want to make a permanent change to the data type, such as converting numeric to strings and concatenating them.

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-- convert (DATATYPE, [OrderID]) ``e.g. "convert(varchar, [OrderID])"``

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-More information about using these functions can be found [[here|http://msdn.microsoft.com/en-us/library/aa226054(v=sql.80).aspx]] and [[here|http://dev.mysql.com/doc/refman/5.5/en/cast-functions.html#function_cast]]

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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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-- 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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-- 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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-- min(OrderID) produces the minimum OrderID value within a given range.

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-- round(OrderID, x) takes a decimal value and rounds it to x digits.

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-- sum(OrderID) produces the sum of all OrderID values.

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-It is possible to enable other SQL functions or write new functions. Please see this link to our knowledge base for instructions:

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-http://www.izenda.com/Site/CodeSample/CodeSample.aspx?setting=ExtendedFunctions

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-[[15.0 Expressions in Izenda]]

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-[[UserGuides]]