SQL里边的求和语句怎么写答:select sum(A),sum(B),sum(C),sum(D),sum(E),sum(F),sum(G) from 表名 横向汇总的SQL语句是: select A,B,C,D,E,F,G,A+B+C+D+E+F+G from 表名 求所有数据总和的SQL语句是:select sum(A)+sum(B)+sum(C)+sum(D)+sum(E)+sum(F)+sum(G) from 表名 ...
sql怎么把一行数据中的几列相加?答:insert into test_num values(1004, 4200,1400,6800);insert into test_num values(1005, 5200,1330,7800);insert into test_num values(1006, 6200,1800,5200);3、查询表中记录,select * from TEST_NUM t 4、编辑sql,输出多列相加的结果,select t.*, fee1+fee2+fee_3 as fee_all ...