我有 4 张桌子:
#table 1 columns - areacode,section_number,maint_charge
#table 2 columns - section_number,discount,fee,total_Maint_charge
#table 3 columns - areacode, statename
#table 4 columns - section_number , customer
映射如下:
#table1.areacode = #table3.areacode
#table1.section_number = #table2.section_number
我想得到这样的东西:
state,section_number,maint_charge,maint_charge/total_maint_charge,
fee*(maint_charge/total_maint_charge)
谢谢