sql怎麼求兩列的和

㈠ mysql資料庫有兩列數據,怎麼求和,具體看詳情!

select sum(case b is null when a else b end) from table;

㈡ SQL語句怎麼實現兩列內容相加

select a+b from table

㈢ sql 如何查詢一個表中的兩列之和

select column1+column2 as 和 from table

㈣ 求SQL兩列數據求和

select IDependCode, sum(money1) as money3 from (select * from table1
union all
select * from table2
) as temp group by IDependCode

㈤ sql語句列求和

select sum(數據1)，sum(數據2) from table

如果表裡只有這兩列，則語句如上，如果還有其它列並且需要分組，則添加group by語句，如:
select sum(數據1)，sum(數據2) from table
group by 其它列

㈥ sql語句求兩列的(相加)和

select sum(a+b) as c from table

如有疑問：加我：514895860

㈦ 怎麼查詢sql表兩列相加的和

做個簡單的。
兩個數據表db1,db2

查詢結果A是從數據表db1獲取的：
select names, sale from db1

查詢結果B是從數據表db2獲取的：
select names, sale from db2

則查詢結果C：

select names,sum(sale) as sale
from
(select names, sale from db1
union
select names, sale from db2
)
group by names

㈧ sql 計算結果兩列的和

selectsum(xxxx)asa,sum(xxxx)asb,sum(xxxx)+sum(xxxx)ascfromxxxxx

㈨ sql怎麼把一行數據中的幾列相加

1、創建測試表，create table test_num(fee_id number, fee1 number, fee2 number, fee_3 number);