标签:mysq stat sql col cal str pre sel nbsp
SELECT IFNULL(sum(c.tax_data),0) ,IFNULL(SUM(c.fiscal_ret),0) FROM corp_tax c WHERE c.industry_id = 100 and c.corp_year =2018 and c.corp_month =6 and c.status = 1 and park_id=1
使用ifnull(expr,expr) 来处理。上面的sql sum(c.tax_data) 如果是null 则返回0.
标签:mysq stat sql col cal str pre sel nbsp
原文地址:https://www.cnblogs.com/prader6/p/10916440.html