Question

我写了一个SQL查询。但这给了我一个错误。

DECLARE @Delimiter Char(1)
SET @Delimiter = CHAR(9)
EXEC MSDB.dbo.sp_Send_DBMail
@profile_name = 'K2MailSetup',
@Recipients='test@xyz.com',
@Subject='Extraction Report',
@Body='Hi',
@Query='set nocount on;
Select Coalesce(replace(replace(A.[type], char(10), ''''), char(13), ''''),'''') as Type,
 try_convert(xml, col).value(''(/collection/object/fields/field/value)[1]'', ''varchar(3)'') 
from (select col= Coalesce(replace(replace(A.[business_line], char(10), ''''), char(13), ''''),'''')
    FROM [EU_OTH_REG].[dbo].[TBL_EU_OTH_TXN_REG_RSDS] A'

错误状态

第15层状态1线的消息102
'/'附近的语法不正确。

Answer 1

我在这里发现了2个问题。

您的子查询未正确关闭

您的报价未终止属性

Declare @Query as nvarchar(1000) 
Set @Query='set nocount on; 
            set QUOTED_IDENTIFIER on;
            Select try_convert(xml, Coalesce(replace(replace(A.[business_line], char(10), '''''''')
                        , char(13), ''''''''),''''''''))
                        .value(''(/collection/object/fields/field/value)[1]'', ''varchar(3)'') 
                , Coalesce(replace(replace(A.[type], char(10), ''''''''), char(13), ''''''''),'''''''') as [Type]
                from [EU_OTH_REG].[dbo].[TBL_EU_OTH_TXN_REG_RSDS] A;'

Answer 2

动态SQL的窍门是在尝试使其动态化之前确保SQL能够正常工作。

您的查询需要进行多次调整才能用作基本SQL查询：

set nocount on;

select coalesce(replace(replace(A.[type], char(10), ''''), char(13), ''''),'''') as Type
  , try_convert(xml, col).value('(/collection/object/fields/field/value)[1]', 'varchar(3)') 
from (
    select col = coalesce(replace(replace([business_line], char(10), ''''), char(13), ''''),''''), Type
    FROM [EU_OTH_REG].[dbo].[TBL_EU_OTH_TXN_REG_RSDS]
) A;

然后直到那时，通过将所有单引号加倍将其转换为动态SQL：

declare @Query as nvarchar(1000) = 'set nocount on;

select coalesce(replace(replace(A.[type], char(10), ''''), char(13), ''''),'''') as Type
  , try_convert(xml, col).value(''(/collection/object/fields/field/value)[1]'', ''varchar(3)'') 
from (
    select col = coalesce(replace(replace([business_line], char(10), ''''), char(13), ''''),''''), Type
    FROM [EU_OTH_REG].[dbo].[TBL_EU_OTH_TXN_REG_RSDS]
) A;'

exec(@Query);

将查询变量传递给MSDB.dbo.sp_Send_DBMail

2 个答案: