How to find power of a number in SQLite

Question

I want to update the Interest field in my database. My SQL query is like as per below

Update Table_Name set Interest = Principal * Power(( 1 + (rate

Answer 1

This could be solved with SQL. This works for integer exponents:

Drop Table if Exists args ;
Create Table args as Select 2.5 as Base, 4 as Exponent ;

WITH RECURSIVE pow(exponent, exponent_remainder, base, result) as (
    --FIRST EXPRESSION
    SELECT exponent,exponent -1 , base,base
    FROM args
    
    union all 
    --SECOND EXPRESSION
    select Args.exponent,pow.exponent_remainder -1, pow.base,pow.result * pow.base
    from args
    join pow on args.exponent = pow.exponent
    where pow.exponent_remainder >= 0
)
select pow.result
from pow
where pow.exponent_remainder = 0;