Question

oracle 列求和问题

现在select a,b,c,sum from table。问：其中sum=a+b+c，sql语句怎么写？

Answer 1

select a,b,c,a+b+c sum from table

Answer 2

select a,b,c,a+b+c sum from table

Answer 3

select a+b+c from table

Answer 4

select a,b,c ,a+b+c sum from table