Question

我有这段代码：

select CAST(OPERATOR_NAME AS NVARCHAR(MAX)) as 'Utilizador',
TERMINAL_DESCRIPTION as 'Terminal',
DOCUMENT_DATE as 'Data de Inicio',
PAYMENT_LIMIT_DATE as 'Data de Fim',
ORIGIN_WAREHOUSE_NAME as 'Loja',
DOCUMENT_TYPE_DESCRIPTION as 'Tipos de Documentos' 
from MRD_DOCUMENT_HEADER 
GROUP BY CAST(OPERATOR_NAME AS NVARCHAR(MAX))

但它给了我这个错误：

列MRD_DOCUMENT_HEADER.TERMINAL_DESCRIPTION在选择列表中无效，因为它不包含在聚合函数或GROUP BY子句中。

我尝试VARCHAR(100)和MAX，但这也不起作用。

我怎样才能使这个工作？

更新

SELECT DISTINCT
      Utilizador = OPERATOR_NAME 
    , Terminal = TERMINAL_DESCRIPTION 
    , [Data de Inicio] = DOCUMENT_DATE
    , [Data de Fim] = PAYMENT_LIMIT_DATE
    , Loja = ORIGIN_WAREHOUSE_NAME 
    , [Tipos de Documentos] = DOCUMENT_TYPE_DESCRIPTION
FROM dbo.MRD_DOCUMENT_HEADER
WHERE
       MRD_DOCUMENT_HEADER.DOCUMENT_TYPE_DESCRIPTION = (@DOCUMENT_TYPE_DESCRIPTION)
    OR MRD_DOCUMENT_HEADER.DOCUMENT_DATE = (@DOCUMENT_DATE)
    OR MRD_DOCUMENT_HEADER.PAYMENT_LIMIT_DATE =(@PAYMENT_LIMIT_DATE)
    OR MRD_DOCUMENT_HEADER.CORPORATION_ID = (@CORPORATION_ID)

Answer 1

您必须将这些列放在GROUP BY子句中。它会解决你的问题。只需使用以下代码：

select CAST(OPERATOR_NAME AS NVARCHAR(MAX)) as 'Utilizador',
TERMINAL_DESCRIPTION as 'Terminal',
DOCUMENT_DATE as 'Data de Inicio',
PAYMENT_LIMIT_DATE as 'Data de Fim',
ORIGIN_WAREHOUSE_NAME as 'Loja',
DOCUMENT_TYPE_DESCRIPTION as 'Tipos de Documentos' 
from MRD_DOCUMENT_HEADER 
GROUP BY
  CAST(OPERATOR_NAME AS NVARCHAR(MAX)),
  TERMINAL_DESCRIPTION, DOCUMENT_DATE,
  PAYMENT_LIMIT_DATE,
  ORIGIN_WAREHOUSE_NAME,
  DOCUMENT_TYPE_DESCRIPTION

Answer 2

试试这个 -

SELECT  
      Utilizador = OPERATOR_NAME 
    , Terminal = TERMINAL_DESCRIPTION 
    , [Data de Inicio] = DOCUMENT_DATE
    , [Data de Fim] = PAYMENT_LIMIT_DATE
    , Loja = ORIGIN_WAREHOUSE_NAME 
    , [Tipos de Documentos] = DOCUMENT_TYPE_DESCRIPTION
FROM dbo.MRD_DOCUMENT_HEADER
GROUP BY 
      OPERATOR_NAME
    , TERMINAL_DESCRIPTION
    , DOCUMENT_DATE
    , PAYMENT_LIMIT_DATE
    , ORIGIN_WAREHOUSE_NAME
    , DOCUMENT_TYPE_DESCRIPTION
        DOCUMENT_TYPE_DESCRIPTION

或尝试更优雅的样本 -

SELECT DISTINCT
      Utilizador = OPERATOR_NAME 
    , Terminal = TERMINAL_DESCRIPTION 
    , [Data de Inicio] = DOCUMENT_DATE
    , [Data de Fim] = PAYMENT_LIMIT_DATE
    , Loja = ORIGIN_WAREHOUSE_NAME 
    , [Tipos de Documentos] = DOCUMENT_TYPE_DESCRIPTION
FROM dbo.MRD_DOCUMENT_HEADER

上次评论的更新：

SELECT
      Utilizador = OPERATOR_NAME 
    , Terminal = MAX(TERMINAL_DESCRIPTION)
    , [Data de Inicio] = MAX(DOCUMENT_DATE)
    , [Data de Fim] = MAX(PAYMENT_LIMIT_DATE)
    , Loja = MAX(ORIGIN_WAREHOUSE_NAME)
    , [Tipos de Documentos] = MAX(DOCUMENT_TYPE_DESCRIPTION)
FROM dbo.MRD_DOCUMENT_HEADER
GROUP BY OPERATOR_NAME

更新2以获取最后评论：

SELECT DISTINCT
      Utilizador = OPERATOR_NAME 
    , Terminal = TERMINAL_DESCRIPTION 
    , [Data de Inicio] = CONVERT(VARCHAR(10), DOCUMENT_DATE, 120)
    , [Data de Fim] = PAYMENT_LIMIT_DATE
    , Loja = ORIGIN_WAREHOUSE_NAME 
    , [Tipos de Documentos] = DOCUMENT_TYPE_DESCRIPTION
FROM dbo.MRD_DOCUMENT_HEADER t
WHERE t.DOCUMENT_TYPE_DESCRIPTION = @DOCUMENT_TYPE_DESCRIPTION
    OR t.DOCUMENT_DATE = @DOCUMENT_DATE
    OR t.PAYMENT_LIMIT_DATE = @PAYMENT_LIMIT_DATE
    OR t.CORPORATION_ID = @CORPORATION_ID

Answer 3

如果在SQL中使用GROUP BY子句，那么在SELECT列表中，您只能使用GROUP BY中使用的相同列，而必须的任何其他列包含在聚合函数中，如count()，min()，max()，avg()等。

这是SQL92 / SQL99的要求。但是，一些SQL引擎非常宽容，例如MySQL和SQLite允许违反此规则。但MS SQL Server，Oracle和PostgreSQL相当严格。

Answer 4

在此SELECT中，似乎只是字母数字值，因此您可以设置ORDER BY OPERATOR_NAME。

GROUP BY语句与聚合函数结合使用，将结果集分组为一列或多列（MIN，MAX，COUNT）。

有没有办法按文本列分组？

4 个答案: