但是下面的查询返回一行字段为空的数据。 select *, SUM(offers.price * announcement_product.amount) AS total, announcements.user_id ASannouncements.id AS ann_id, paymentAnn, SUM
下面是我的代码:FROM (SELECT k2.prod_code, k2.cust_code, SUM(k2.price) AS total_sum FROM reservation AS k2 GROUP BY k2.prod_code, k2.cust_code) AS q1 prod_code _ cust_code _ total_sum
1001 x 10002 \x{e76f
我有一个从数据库打印记录的查询,但我不知道如何省略某些字段中包含零的记录。可能包含零的字段包括townhalls、org_pressconf、rep_doors、vol_doors、contacts、phones、coffeehours、newsarticles和mediahits如果我上面提到的每个字段都等于零,我该如何编写查询来忽略这些结果呢?, sum(vol_doors) as VolunteerDoors,
sum(
Case语句语法(MySQL):- WHEN search_condition THEN statement_listSELECT sum(case when Year=2014 or purchased=0 then 0 else TC.TOTAL_SP_COST-TC.TOTAL_CP_COSTSERVER中添加2字段时,我得到了"or“下面的红线。SELECT sum(case