文章浏览阅读8.5k次。表fin_invoice有一列created_date DATETIME,对该列已建索引,且数据库里有1.7万条记录,对比如下:语句explain输出中的type列explain SELECT t.* FROM fin_invoice t where t.created_date >= ‘2019-10-01 00:00:00’ AND t.created_date &.........
文章浏览阅读103次。To keep it simple, let me keep it this way:Considering two table A and B and internal table ITAB: Inner Join:It requires an entry with KEY of A in B, to be extracted tointernal table. Outer Joi......