1

我正在尝试从 WonderWare 历史数据库中获取数据库中所有标签的数据。已经有一个包含所有标签的表，所以我想使用子查询来选择所有标签名称。我收到这个子查询的错误。

我的sql语句：

/******

I want to be able to select:
    - all columns
    - for all tags <-- I'm getting an error here, trying to use a subquery
    - between two time stamps
    - at a specified resolution

******/

SELECT *
FROM
    Runtime.[dbo].AnalogHistory
WHERE
    TagName IN (
        SELECT DISTINCT TagName
        FROM
            Runtime.dbo.Tag
    )
AND
    DateTime >= '2016-01-01 00:00'
AND
    DateTime < '2016-01-01 00:30'
AND
    wwResolution = 5000
AND
    wwRetrievalMode = 'Average'
AND
    wwTimeStampRule = 'Start'

我收到的错误如下：

OLE DB provider "INSQL" for linked server "INSQL" returned message "History queries must contain at least one valid tagname".

我猜这意味着它没有被正确执行。

我也尝试过使用openquery，但后来我得到了与子查询相关的其他错误，无法辨别关于标签表的“模式”信息：

OLE DB provider "INSQL" for linked server "INSQL" returned message "Failed to retrieve schema information for object 'Tag'".

这是更改的摘录：

TagName IN ( SELECT * FROM OPENQUERY(INSQL, 
    'SELECT DISTINCT TagName
    FROM
        Runtime.dbo.Tag')
)
4

2 回答 2

2

Historian Server 不是普通的 SQL Server 数据库。它的历史视图从 INSQL 链接服务器获取数据。INSQL 有一些特殊的规则，这些规则记录在 HistorianConcepts.pdf 中。

SELECT 
    *
FROM
    Runtime.dbo.Tag t
INNER REMOTE JOIN 
    Runtime.dbo.AnalogHistory h
ON 
    t.TagName = h.TagName
WHERE
    DateTime >= '2016-01-01 00:00'
AND
    DateTime < '2016-01-01 00:30'
AND
    wwResolution = 5000
AND
    wwRetrievalMode = 'Average'
AND
    wwTimeStampRule = 'Start'
于 2017-07-31T08:39:18.203 回答
0

尝试：

SELECT DISTINCT aa.TagName FROM (
 SELECT DateTime, TagName, Value
 FROM History
 WHERE DateTime >= '2016-01-01 00:00'
 AND DateTime <= '2016-01-01 00:30'
 AND wwResolution = 5000
 AND wwRetrievalMode = 'Average'
 AND wwTimeStampRule = 'Start'
) aa
于 2017-02-18T20:17:30.613 回答