SELECT a.scph 生产批次1,
       a.Pcode 产品型号3,
       a.Xpcode 芯片3,
       a.Zjcode 支架3,
       a.WavelengthGrade 芯片波段1,
       a.produceqty,
       a.存量,
       a.Seq AS 配胶方案序号1,
       CASE a.State
            WHEN 1 THEN '待首件方案'
            WHEN 2 THEN '待配首件'
            WHEN 3 THEN '待首件检验'
            WHEN 4 THEN '待自主方案'
            WHEN 5 THEN '待配自主'
            WHEN 6 THEN '待自主检验'
            WHEN 7 THEN '待配批量'
            WHEN 8 THEN '批量结束'
            WHEN 9 THEN '待首件方案'
       END 方案状态
FROM   (
           SELECT a.id,
                  a.scph,
                  b.Pcode,
                  b.Xpcode,
                  b.Zjcode,
                  a.WavelengthGrade,
                  a.Seq,
                  a.State,
                  c.produceqty,
                  c.存量
           FROM   dbo.Jit_Mucus_RateScheme a
                  INNER JOIN jit_rwd b
                       ON  a.scph = b.scph
                  INNER JOIN (
                           SELECT c.scph,
                                  d.scph,------是不是这里有问题，字段名相同了，加了别名试试
                                  c.produceQty,
                                  c.produceQty -d.produceQty AS 存量
                           FROM   (
                                      (
                                          SELECT scph,
                                                 produceqty
                                          FROM   dbo.View_Jit_rwdProduceProcess
                                          WHERE  StepName = '焊芯片/芯片+zener'
                                      ) c
                                      INNER JOIN 
                                      (
                                          SELECT scph,
                                                 produceqty
                                          FROM   dbo.View_Jit_rwdProduceProcess
                                          WHERE  StepName = '注胶'
                                      ) d
                                      ON c.scph = d.scph
                                  )
                       ) c
                       ON  c.scph = a.Scph
       ) a