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Re: Function in psql to Compare two numbers and return the bigger value

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Emi Lu wrote:

I am looking for a psql method to get the bigger value of two numbers.

For example,

methodName(12.6, 3.8)

select greatest(12.6,3.8);

It does not work for me,
select greatest(12.6,3.8);
ERROR:  function greatest(numeric, numeric) does not exist
HINT: No function matches the given name and argument types. You may need to add explicit type casts.

In 8.1 docs, it says that:
GREATEST(value [, ...])
LEAST(value [, ...])

* Note that GREATEST and LEAST are not in the SQL standard, but are a common extension. *

Does it mean it is not allowed to use "select greatest(12.6,3.8)" ?

I see the reason, my version is 8.0.8. The doc is for 8.1.

Thank you for all your help!


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