Executing SQL query on multiple databases

Question

I know my post has a very similar title to other ones in this forum, but I really couldn\'t find the answer I need.

Here is my problem, I have a SQL Server running o

Answer 1

Depending on the requirement, you can do this:

declare @dbName nvarchar(100)
declare @script nvarchar(max)
declare @dbIndex bigint = 0
declare @dbCount bigint = (
    select count(*) from
        sys.databases

    )
declare crs_databases cursor for
(
    select
        [name]
    from
        sys.databases   
)
open crs_databases
fetch next from crs_databases into @dbName
while @@FETCH_STATUS = 0
begin
    set @dbIndex = @dbIndex+1
    set @script = concat(@script,
        ' select Id from ['+@dbName+']..YourTableName ',        
        case 
            when @dbIndex = @dbCount then ''
            else 'union'
        end)
    fetch next from crs_databases into @dbName
end

select @script
close crs_databases
deallocate crs_databases

Please note that the double dotted notation assumes that the schema is dbo. Otherwise, you need to explicitly write down the schema.

select Id from ['+@dbName+'].schema.YourTableName

When you need to execute stored procedures on each server, the @script variable will have another content.