如何检查数据库是否存在于远程服务器上通过SQL查询 [英] How to check if database exist on Remote Server through SQL query

问题描述

我在SQL Server 2012中有一个表如下。

I have a table as following in SQL Server 2012.

|---------------------|------------------|------------------|
|      ClientName     |     servername   |Databasename      |
|---------------------|------------------|------------------|
|          c1         |         s1       |         b1       |
|          c2         |         s2       |         b2       |
|          c3         |         s4       |         b4       |
|          c4         |         s5       |         b6       |
|---------------------|------------------|------------------|

有没有办法只返回表中提到的服务器名称上存在数据库的行？

Is there a way to return only rows for which database exists on the server names mentioned in the table?

我在论坛搜索答案，但无法获得答案。我知道，存在一个查询，如这里所述检查该服务器上的数据库是否存在。

I searched in forums for the answer but couldn't get one. I am aware that there exists a query as mentioned here which checks whether database on that server exists or not. But in my case, I want it to be part of where clause.

但是在我的例子中，我想要它成为where子句的一部分。

推荐答案

所以，我认为你已经将所有的服务器链接，并使用了一个帐户，它可以读取架构。不是脚本将是这样：

So, I assume you already have all your server linked and you used an account, which can read the schema. Than script will be something like this:

SELECT TOP 0 * INTO #tbl_Server_DBs
FROM tbl_Server_DBs

DECLARE ServerDBs CURSOR LOCAL STATIC FORWARD_ONLY 
FOR SELECT ClientName, servername, Databasename FROM tbl_Server_DBs

DECLARE @ClientName NVARCHAR(128), @servername NVARCHAR(128), @Databasename NVARCHAR(128);
DECLARE @s NVARCHAR(4000)

OPEN ServerDBs
FETCH NEXT FROM ServerDBs 
INTO @ClientName, @servername, @Databasename

WHILE (@@fetch_status <> -1)
BEGIN
    SET @s = N'SELECT ''' + @ClientName + N''', ''' + @servername + N''', name 
        FROM [' + @servername + N'].sys.databases
        WHERE name = ''' + @Databasename + N''';';

    PRINT @s
    INSERT INTO #tbl_Server_DBs (ClientName, servername, Databasename)
    EXEC(@s);

    FETCH NEXT FROM ServerDBs 
    INTO @ClientName, @servername, @Databasename
END

CLOSE ServerDBs
DEALLOCATE ServerDBs

SELECT * FROM #tbl_Server_DBs;

这篇关于如何检查数据库是否存在于远程服务器上通过SQL查询的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！