我想要列FLAN01+FLAN02+FLAN03+FLAN04列的总和，并在每个flnumb的flawtd中加上总和。所以我需要你的帮助，谢谢
FLAID FLCTRY FLFY FLLT FLAPYC FLAN01 FLAN02 FLAN03 FLAN04 FLAWTD FLNUMB
2749023 20 17 AA -2832227 0 0 0 0 0 1
2524 20 17 AA -164999 0 0 0 0 0 2
2749023 20 17 AA -2460920 0 0 0 0 0 3
2749023 20 17 AA -2756040 0 0 0 0 0 4
2524 20 17 AA -197730 0 0 0 0 0 5
2749277 20 17 AA -133875 0 0 0 0 0 6
2749091 20 17 AA -957654 -8619 -8619 -8620 -8619 -94812 7
2749091 20 17 AA -957654 -8619 -8619 -8620 -8619 -94812 8
2749091 20 17 AA -957654 -8619 -8619 -8620 -8619 -94812 9
2749091 20 17 AA -957654 -8619 -8619 -8620 -8619 -94812 10
2749091 20 17 AA -957654 -8619 -8619 -8620 -8619 -94812 11
2749091 20 17 AA -921543 -9314 -9314 -9314 -9314 -102453 12
2749091 20 17 AA -957654 -8619 -8619 -8620 -8619 -94812 13
2749091 20 17 AA -921543 -9314 -9314 -9314 -9314 -102453 14
2749091 20 17 AA -921543 -9314 -9314 -9314 -9314 -102453 15
答案 0 :(得分：0)
尝试使用这样的UPDATE操作：
UPDATE <table_name>
SET FLAWTD = FLAN01+FLAN02+FLAN03+FLAN04
数据库SQL参考 https://docs.oracle.com/cd/B19306_01/server.102/b14200/statements_10007.htm
答案 1 :(得分：0)
您必须使用MySQL IFNULL function为每个非null的flnumb值添加值，确保它们不为空。
UPDATE <table_name>
SET FLAWTD=IFNULL(FLAN01,0)+IFNULL(FLAN02,0)+IFNULL(FLAN03,0)+IFNULL(FLAN04,0)
WHERE flnumb IS NOT NULL;