SELECT 使用相关子查询和多个表

Question

我有两个 table（表 1 和表 2）。一个包括一个日期 (tDate) 列和一个我想作为分组依据的 ID (tTillNo) 列。另一个具有我想为每个日期和 ID 求和的值 (pValue)。

可以使用每个 table 中的 'tName' 和 'pName' 列连接 table，但是 pName 列可能有重复项，我想计入总和。对于 3 个子查询，我还需要使用 'pCode' 列包含 where 子句。

我想 return 此处显示的列

然而，使用下面的代码 returns 子查询的总计不正确，因为我正在使用 'MAX(a.tName)' 来防止对该字段进行分组。谁能建议另一种方法来防止这种情况或进行此查询的另一种方法？

SELECT 
    DATENAME(Month,a.tDate) as 'Month Name', DAY(a.tDate) as 'Day', 
    MONTH(a.tDate) as 'Month', YEAR(a.tDate) as 'Year', a.tTillNo,

    BankedCash=(SELECT ISNULL(CAST(SUM(b.pValue) as numeric(12,2)),0) 
               FROM Table2 b 
                    where MAX(a.tName)=b.pName AND pCode = 'CSH' 
                    or pCode = 'CHQ'),

    CardTransactions=(SELECT ISNULL(CAST(SUM(b.pValue) as numeric(12,2)),0) 
                     FROM Table2 b 
                          where MAX(a.tName)=b.pName AND b.pCode = 'CRD'),

    BankingTotal=(SELECT ISNULL(CAST(SUM(b.pValue) as numeric(12,2)),0) 
                 FROM Table2 b 
                      where MAX(a.tName)=b.pName AND b.pCode = 'CSH' or 
                      b.pCode = 'CHQ' or b.pCode = 'CRD')

FROM Table1 a

group by YEAR(a.tDate), MONTH (a.tDate), DATENAME(Month,a.tDate), 
DAY(a.tDate), a.tTillNo

order by YEAR(a.tDate), MONTH (a.tDate), DATENAME(Month,a.tDate)

任何建议或文章推荐将不胜感激。非常感谢。

CREATE TABLE [dbo].[Table1](
[UniqueID] [int] IDENTITY(1,1) NOT NULL,
[tTillNo] [varchar](4) NULL,
[tName] [varchar](20) NULL,
[tDate] [datetime] NULL)

INSERT INTO Table1 (tTillNo, tName, tDate)
VALUES ('0101', '01010000001', '2018-10-30 00:00:00.000'),
       ('0101', '01010000002', '2018-10-30 00:00:00.000'),
       ('0102', '01020000001', '2018-10-30 00:00:00.000'),
       ('0102', '01020000002', '2018-10-30 00:00:00.000')

CREATE TABLE [dbo].[Table2](
[UniqueID] [int] IDENTITY(1,1) NOT NULL,
[pName] [varchar](20) NULL,
[pCode] [varchar](10) NULL,
[pValue] [decimal](22, 7) NULL)


INSERT INTO Table2 (pName, pCode, pValue)
VALUES ('01010000001', 'CRD', '100.0000000'),
       ('01010000002', 'CSH', '100.0000000'),
       ('01020000001', 'CHQ', '100.0000000'),
       ('01020000002', 'CSH', '100.0000000'),
       ('01020000002', 'CRD', '100.0000000'),
       ('01010000001', 'CSH', '100.0000000')

Answer 1

我想你可以通过连接来解决这一切。

select DATENAME(Month,a.tDate) as 'Month Name'
   , DAY(a.tDate) as 'Day'
   , MONTH(a.tDate) as 'Month'
   , YEAR(a.tDate) as 'Year'
   , a.tTillNo
   , BankedCash=SUM(case when pCode in( 'CSH','CHQ') then pvalue else 0 end)
   , [Card] = SUM(case when pCode in( 'CRD') then pvalue else 0 end)
   ,Total = SUM(pvalue)
from TableA a
    join TableB b on a.tName=b.pName
group by YEAR(a.tDate)
    , MONTH (a.tDate)
    , DATENAME(Month,a.tDate)
    , DAY(a.tDate)
    , a.tTillNo

SELECT 使用相关子查询和多个表

SELECT using Correlated Sub Queries and multiple tables

sql

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correlated-subquery