Question

只是想检查是否有更简单的方法或更好的方式来编写以下查询？我必须联合加入大约10个表MMA_AUDITSUM_STG在下面我只做了两个。是否可以一个接一个地输入所有列名称并包含来自MMA_SITE_MST的联接？我使用SQL Server来存储数据。

SELECT 
    a.CLIENT_NAME AS [BRAND], a.SITE_NO AS [SITE NO],
    a.SITE_NAME AS [SITE],
    c.FILTER_1 AS [AREA], c.FILTER_2 AS [REGION],
    a.MANAGER,
    a.AUDIT_DATE AS [db.audit_date], a.THIS_AUDIT_SCORE AS [SCORE],
    a.ALERTS_FLAG AS [ALERTS], a.REPEAT_FLAG AS [REPEAT ISSUES],
    a.ACTION_PLAN_FLAG AS [ACTION PLAN FAILURE],
    a.Cash, a.Revenue, a.Stock, 
    a.[Unaccounted Stock], a.[People & Payroll], 
    a.[Safe], a.[Security], a.[Petty Cash], a.[Tills],
    a.[Bankings], a.[Sales], a.[Vouchers & Discounting],
    a.[PDQ], a.[Administration], 
    a.[Stock Verification], a.[Stock Management], a.[Ordering]
FROM 
    MMA_AUDITSUM_STG_34 As a
INNER JOIN 
    MMA_SITE_MST AS c ON a.CLIENT_ID = c.CLIENT_ID
                      AND a.SITE_ID= c.SITE_ID
                      AND a.SITE_NAME= c.SITE_NAME

UNION ALL

SELECT 
    b.CLIENT_NAME, b.SITE_NO, b.SITE_NAME,
    c.FILTER_1, c.FILTER_2,
    b.MANAGER, b.AUDIT_DATE, b.THIS_AUDIT_SCORE,
    b.ALERTS_FLAG, b.REPEAT_FLAG, b.ACTION_PLAN_FLAG,
    b.Cash, b.Revenue, b.Stock, b.[Unaccounted Stock],
    b.[People & Payroll], b.[Safe], b.[Security],
    b.[Petty Cash], b.[Tills], b.[Bankings], b.[Sales],
    b.[Vouchers & Discounting], b.[PDQ], b.[Administration],
    b.[Stock Verification], b.[Stock Management], b.[Ordering]
FROM 
    MMA_AUDITSUM_STG_35 As b
INNER JOIN 
    MMA_SITE_MST As c ON b.CLIENT_ID = b.CLIENT_ID
                      AND b.SITE_ID = c.SITE_ID
                      AND b.SITE_NAME = c.SITE_NAME

任何观点都欢迎，因为我还在学习，所以不确定我是否做了上述权利，即使它能得到我需要的结果：）

提前谢谢

约翰

Answer 1

如果确实需要所有单独的表，您可以考虑创建一个视图：

CREATE VIEW v_MMA_AuditSum(
  SELECT * FROM MMA_AUDITSUM_STG_34
  UNION ALL
  SELECT * FROM MMA_AUDITSUM_STG_35
  UNION ALL
  ....
)

然后将其加入您的MMA_SITE_MST

SELECT a.CLIENT_NAME
     ,a.SITE_NO
     ,a.SITE_NAME
     ,a.FILTER_1
     ,a.FILTER_2
     ,b.*
  FROM MMA_SITE_MST AS a
  JOIN cte AS b ON a.CLIENT_ID= b.CLIENT_ID
                AND a.SITE_ID= b.SITE_ID
                AND a.SITE_NAME= b.SITE_NAME

使用UNION ALL在SQL Server中进行数据库查询

1 个答案: