sp_MSforeachdb: only include results from databases with results
Well, first, stop using sp_MSforEachDb
. Oh, the problems (if you want proof, see here).
How about:
DECLARE @cmd NVARCHAR(MAX) = N'', @sql NVARCHAR(MAX) = N'';
SELECT @cmd += N'IF EXISTS (SELECT 1 FROM '
+ QUOTENAME(name) + '.sys.tables WHERE name = N''Tabs'')
SET @sql += N''UNION ALL
SELECT ''''' + name + ''''',T.TabName
FROM ' + QUOTENAME(name) + '.dbo.Tabs AS T
WHERE EXISTS
(
SELECT 1 FROM ' + QUOTENAME(name) + '.dbo.TabModules AS TM
WHERE TM.TabID = T.TabID
AND TM.mID IN -- this should probably be exists too
(
...
)
)
'''
FROM sys.databases
WHERE state = 0 -- assume you only want online databases
AND database_id > 4; -- assume you don't want system dbs
EXEC sp_executesql @cmd, N'@sql NVARCHAR(MAX) OUTPUT', @sql OUTPUT;
SET @sql = STUFF(@sql, 1, 10, '') + N' ORDER BY TabName;';
PRINT @sql; -- this will appear truncated, but trust me, it is not truncated
-- EXEC sp_executesql @sql;
If you really want some unknown, arbitrary number of separate resultsets, the change is simple.
DECLARE @cmd NVARCHAR(MAX) = N'', @sql NVARCHAR(MAX) = N'';
SELECT @cmd += N'IF EXISTS (SELECT 1 FROM '
+ QUOTENAME(name) + '.sys.tables WHERE name = N''Tabs'')
SET @sql += N''SELECT ''''' + name + ''''',T.TabName
FROM ' + QUOTENAME(name) + '.dbo.Tabs AS T
WHERE EXISTS
(
SELECT 1 FROM ' + QUOTENAME(name) + '.dbo.TabModules AS TM
WHERE TM.TabID = T.TabID
AND TM.mID IN -- this should probably be exists too
(
...
)
)
ORDER BY T.TabName;
'';'
FROM sys.databases
WHERE state = 0 -- assume you only want online databases
--AND database_id > 4; -- assume you don't want system dbs
EXEC sp_executesql @cmd, N'@sql NVARCHAR(MAX) OUTPUT', @sql OUTPUT;
PRINT @sql; -- this will appear truncated, but trust me, it is not truncated
-- EXEC sp_executesql @sql;