如何实现物料清单的循环查找合并?
父件 子件 定额 工艺链11HQ653 211HQ653-01 1 11HQ653/211HQ653-01
211HQ653-01 211HA653-01 1 11HQ653/211HQ653-01/211HA653-01
211HA653-01 211A653-01 1 11HQ653/211HQ653-01/211HA653-01/211A653-01
211A653-01 211G653-01 1 11HQ653/211HQ653-01/211HA653-01/211A653-01/211G653-01
211G653-01 211Y653-01 1 11HQ653/211HQ653-01/211HA653-01/211A653-01/211G653-01/211Y653-01
211Y653-01 401990 0.012 11HQ653/211HQ653-01/211HA653-01/211A653-01/211G653-01/211Y653-01/401990
11HQ653 399Y81196 1 11HQ653/399Y81196
11HQ653 5016547 0.01 11HQ653/5016547
11HQ653 503M6547 1 11HQ653/503M6547
11HQ653 5046547 0.02 11HQ653/5046547
11HQ653 5070060 1 11HQ653/5070060
通过查询父件和子件合并出“工艺链”列的内容,通过SQL该如何做才可以实现?
请各位大师指点指点!谢谢!