Sql server 2005 SQL SP_EXECSQL@VAR运行一个"；“动态”；OpenQuery

我有一个OpenQuery（在SQL2005中用于对遗留数据库运行查询）。我正在构建要运行的字符串，以便返回最后6个月的数据

我遇到的问题是把“| |”改成concat

这适用于遗留系统：

SELECT
    EVENT_DATE || ' ' || EVENT_TIME as EVENTDateTime
FROM
     EVENT

这通过链接的SQL Server在SQL2005中起作用：

Declare @Query nvarchar(MAX)
Set @Query = N'
    SELECT
        *
    FROM
        OPENQUERY(PATCOMLIVE,
             ''SELECT
                *
            FROM
                 root.ESDB_EVENT as EV
            ''
            ) as OpenQ';

exec sp_executesql @Query

这不起作用：

Declare @Query nvarchar(MAX)
Set @Query = N'
    SELECT
        *
    FROM
        OPENQUERY(PATCOMLIVE,
             ''SELECT
                EVENT_DATE || '' '' || EVENT_TIME
            FROM
                 root.ESDB_EVENT as EV
            ''
            ) as OpenQ';

exec sp_executesql @Query

这也不是：

                EVENT_DATE '|'| '' '' '|'| EVENT_TIME

---

我知道我错过了一些简单的事情。。。但是，将字符串连接在一起的| |将把事情搞砸了，尽管它本身可以在遗留系统上工作。

您是对的，它不工作，因为它没有将完整的字符串发送到

OPENQUERY

，您可以尝试两种方法。首先，连接右侧的

”

，应该是这样的：

Set @Query = N'
    SELECT
        *
    FROM
        OPENQUERY(PATCOMLIVE,
             ''SELECT
                EVENT_DATE || '''' '''' || EVENT_TIME
            FROM
                 root.ESDB_EVENT as EV
            ''
            ) as OpenQ';

Set @Query = N'
    SELECT
        *, EVENT_DATE + '' '' + EVENT_TIME
    FROM
        OPENQUERY(PATCOMLIVE,
             ''SELECT
                *
            FROM
                 root.ESDB_EVENT as EV
            ''
            ) as OpenQ';

或者可以尝试在SQL中连接这些列，如下所示：

Set @Query = N'
    SELECT
        *
    FROM
        OPENQUERY(PATCOMLIVE,
             ''SELECT
                EVENT_DATE || '''' '''' || EVENT_TIME
            FROM
                 root.ESDB_EVENT as EV
            ''
            ) as OpenQ';

Set @Query = N'
    SELECT
        *, EVENT_DATE + '' '' + EVENT_TIME
    FROM
        OPENQUERY(PATCOMLIVE,
             ''SELECT
                *
            FROM
                 root.ESDB_EVENT as EV
            ''
            ) as OpenQ';

---

您是对的，它不工作，因为它没有向

OPENQUERY

发送完整的字符串，您可以尝试两种方法。首先，连接右侧的

”

，应该是这样的：

Set @Query = N'
    SELECT
        *
    FROM
        OPENQUERY(PATCOMLIVE,
             ''SELECT
                EVENT_DATE || '''' '''' || EVENT_TIME
            FROM
                 root.ESDB_EVENT as EV
            ''
            ) as OpenQ';

Set @Query = N'
    SELECT
        *, EVENT_DATE + '' '' + EVENT_TIME
    FROM
        OPENQUERY(PATCOMLIVE,
             ''SELECT
                *
            FROM
                 root.ESDB_EVENT as EV
            ''
            ) as OpenQ';

或者可以尝试在SQL中连接这些列，如下所示：

Set @Query = N'
    SELECT
        *
    FROM
        OPENQUERY(PATCOMLIVE,
             ''SELECT
                EVENT_DATE || '''' '''' || EVENT_TIME
            FROM
                 root.ESDB_EVENT as EV
            ''
            ) as OpenQ';

Set @Query = N'
    SELECT
        *, EVENT_DATE + '' '' + EVENT_TIME
    FROM
        OPENQUERY(PATCOMLIVE,
             ''SELECT
                *
            FROM
                 root.ESDB_EVENT as EV
            ''
            ) as OpenQ';

“成功了”。甚至连一根弦中的弦都没想过。我知道这是一件愚蠢的简单事情。甚至连一根弦中的弦都没想过。我知道这件事很简单。