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Using CONVERT in CASE WHEN

Using CONVERT in CASE WHEN

Using CONVERT in CASE WHEN

(OP)
I have a problem with below SQL code. Error message: "Error converting data type varchar to float."

CODE

CASE WHEN ... THEN volatility else 'NA' end) as volatility

So the field 'volatility' is of datatype 'varchar', while 'NA' is datatype 'float', right?

I guess it can be solved by using CONVERT in the ELSE part. But how to do is not clear to me. It should be something like this:

CODE

CASE WHEN ... THEN volatility else CONVERT(float,volatility) end) as volatility

But I need to have the value 'NA' in the field volatility if the when conditions are not met.

Many thanks for your help.

RE: Using CONVERT in CASE WHEN

(OP)
Thanks for the prompt reply PH. However, if I apply your code I get the value 'NA' for all the fields where I expect a volatility value (e.g. 31.3223501286548).

RE: Using CONVERT in CASE WHEN

(OP)
I found it in the meantime.

CODE

THEN CONVERT(VARCHAR(MAX),volatility,128) else 'NA' end

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