DB2- How to check if varchar field value has integers

Question

Is there an inbuilt DB2 function or any query to check if the character i have is a number? (I cannot use user defined functions)

Answer 1

if you version of db2 can use regexp_like you can do it:

number with "." as decimal symbol:

 select *      from yourtable                            
 where REGEXP_LIKE(trim(yourzone) , '^\d+(\.\d*)?$')

number with "," as decimal symbol:

 select *      from yourtable                            
 where REGEXP_LIKE(trim(yourzone) , '^\d+(\,\d*)?$') 

number without decimal symbol ( integer only, your ask)

 select *      from yourtable                  
 where REGEXP_LIKE(trim(yourzone) , '^\d+$')