明细表1字符串拼接合并插入到明细表2SQL输出过程记录

需求描述：

明细表1：formtable_main_46_dt1

字段：id,mainid, bxmx1, jshj, kmbm, fyxm

明细表4：formtable_main_46_dt4

字段：id,mainid,zy,kmbm,jdbmbm,fyxmbm,yfxmbm,jfje

1. fyxm 为福利费（56）的数据。
2. bxmx1 拼接，”/”间隔（mysql 结果集行拼接group_concat）。
3. jshj 取合计（sum）。
4. 插入到明细表4.
5. 同主表，所以mainid相同。

输出过程：

1. 查看明细表1数据。
2. select mainid, bxmx1, jshj, kmbm, fyxm from formtable_main_46_dt1；
3. 
4. 找一个demo数据，mainid=62，以及过滤符合条件的数据，fyxm=56
5. select mainid, bxmx1, jshj, kmbm, fyxm from formtable_main_46_dt1 where mainid=62 and fyxm =56
6. 
7. 尝试字符串合并group_concat
8. select group_concat(bxmx1) from formtable_main_46_dt1 where mainid=62 and fyxm =56
9. 
10. 逗号替换为‘/’
11. select REPLACE(group_concat(bxmx1),',','/') as zy from formtable_main_46_dt1 where mainid=62 and fyxm =56
12. 
13. select REPLACE(group_concat(bxmx1),',','/') as zy ,sum(jshj) as jfje from formtable_main_46_dt1 where mainid=62 and fyxm =56
14. 
15. 添加其它字段
16. select mainid,REPLACE(group_concat(bxmx1),',','/') as zy ,kmbm,sum(jshj) as jfje from formtable_main_46_dt1 where mainid=62 and fyxm =56
17. 
18. 提高兼容性，加group by
19. select mainid,REPLACE(group_concat(bxmx1),',','/') as zy ,kmbm,sum(jshj) as jfje from formtable_main_46_dt1 where mainid=62 and fyxm =56 group by fyxm
20. 
21. 改为insert into 语句前补全字段
22. select mainid,REPLACE(group_concat(bxmx1),',','/') as zy,kmbm,null as jdbmbm,null as fyxmbm,null as yfxmbm,sum(jshj) as jfje from formtable_main_46_dt1 where mainid=62 and fyxm =56 group by fyxm;
23. 
24. 改为insert into 语句（测试需谨慎）
25. INSERT INTO formtable_main_46_dt4 ( mainid,zy,kmbm,jdbmbm,fyxmbm,yfxmbm,jfje) select mainid,REPLACE(group_concat(bxmx1),',','/') as zy,kmbm,null as jdbmbm,null as fyxmbm,null as yfxmbm,sum(jshj) as jfje from formtable_main_46_dt1 where mainid=62 and fyxm =56 group by fyxm;