如何连接两个表,然后显示从另一个表收集的表的每个数据的总和值 [英]How to join two tables and then display the sum value of each data of a table gathering from the other table
如何从一个表中获取不同的数据,然后联接另一个表并取2列之和 [英]how to get the distinct data from a table and then join other table and take sum of 2 columns
如何使用另一个主表中包含的数据填充和连接 3 个子表 [英]How to fill and join 3 sub tables with data contained in an other main table
MYSQL:如何从 2 个表中进行计数和分组,然后加入到第 3 个表 [英]MYSQL: How to count and group from 2 tables and then join to the 3rd table