sql - Checking for numbers in char field -


i working on database bright spark decided idea store numbers , letters (for no reason) in char field.

now need select number below value error due existence of letters in of records.

i have tried following

select column1 table1 isnumeric(column1)=1 , column1<=16

however following error

conversion failed when converting varchar value '5.00 ' data type int.

now looks number me why can't convert it?

cast column if numeric

select column1 table1 isnumeric(column1)=1 , cast(column1 decimal(18,2)) <= 16.0

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