sql select查詢動態添加列,標識列

1. 使用單引號, 默認值(標識列)

  select 
      'good' as "ELable",
    "DGHashId" as "EHashId",
    "DHashId" as "DHashId",
    "PHashId" as "PHashId",
    "DSNames" as "EContent",    
    "DGDiagnosisTime" as "EDateTime",
    "DGStatus" as "EStatus",
    "DGUpdateTime" as "ECreateTime"
    from "Diagnosis" where
        "DHashId" ='4444444444444444'
        and "PHashId" = 'c61b362b1c9dcd09'
        and "DGStatus" = 1

效果圖如下:

 

 1. 使用ROW_NUMBER() ;(優點,主要用排序功能)

 select 
      row_number() over(order by "DHashId") as "ELable",
    "DGHashId" as "EHashId",
    "DHashId" as "DHashId",
    "PHashId" as "PHashId",
    "DSNames" as "EContent",    
    "DGDiagnosisTime" as "EDateTime",
    "DGStatus" as "EStatus",
    "DGUpdateTime" as "ECreateTime"
    from "Diagnosis" where
        "DHashId" ='4444444444444444'
        and "PHashId" = 'c61b362b1c9dcd09'
        and "DGStatus" = 1

效果如下圖: