When I run my query
SELECT * FROM sys.sysobjects WHERE xtype = 'U'
I find there are 2 more tables added trace_xe_action_map and trace_xe_event_map, I realize then that these two siblings come from extended events but I remember inserting them into my database. Yet I don't know to which xtype they are both belonging to. Because if I run the above query in SQL Server Management Studio; I won't be able to find them. What query should I make to display them in SQL Server Management Studio?
Source1
trace_xe_action_map (Transact-SQL)
Contains one row for each Extended Events action that is mapped to a SQL Trace column ID. This table is stored in the master database, in the sys schema.
Applies to: SQL Server 2012+.
Source 2
trace_xe_event_map (Transact-SQL)
Contains one row for each Extended Events event that is mapped to a SQL Trace event class. This table is stored in the master database, in the sys schema.
Applies to: SQL Server 2012+.
You can use the following query to identify the Extended Events events that are equivalent to the SQL Trace event classes:
SELECT te.name, xe.package_name, xe.xe_event_name
FROM sys.trace_events AS te
LEFT JOIN sys.trace_xe_event_map AS xe
ON te.trace_event_id = xe.trace_event_id
WHERE xe.trace_event_id IS NOT NULL
Not all event classes have equivalent Extended Events events. You can use the following query to list the event classes that do not have an Extended Events equivalent:
SELECT te.trace_event_id, te.name
FROM sys.trace_events AS te
LEFT JOIN sys.trace_xe_event_map AS xe
ON te.trace_event_id = xe.trace_event_id
WHERE xe.trace_event_id IS NULL
By executing this query:
SELECT *
FROM sys.all_objects -- also FROM sys.system_objects
WHERE name like 'trace_xe_%'
You will have a result like this:
name | object_id | type | type_desc
--------------------+------------+------+------------
trace_xe_action_map | -463397375 | U | USER_TABLE
trace_xe_event_map | -319884821 | U | USER_TABLE
Related
When use Database Diagrams in a simple database, SQL Server create a dbo.sysdiagrams table in the Table\Systam Tables node (in Microsoft management studio\object explorer). But sysdiagrams table marked as user table in SQL Server. you can get user table by below query.
SELECT *
FROM sys.tables t
WHERE OBJECTPROPERTY(t.object_id,'IsUserTable') = 1
I don't know that sysdiagram table is a system table or is a user table.
Exists microsoft_database_tools_support with value 1 In the extended property of sysdiagram, that determine this table created automatically.
Management Studio utilizes the following in its determination of "System Objects" where "tbl" is sys.tables:
CAST(
case
when tbl.is_ms_shipped = 1 then 1
when (
select
major_id
from
sys.extended_properties
where
major_id = tbl.object_id and
minor_id = 0 and
class = 1 and
name = N'microsoft_database_tools_support')
is not null then 1
else 0
end
AS bit) AS [IsSystemObject]
System tables are used internally by the SQL Server, they are the same in every user database.
sysdiagrams is not a system table from the server point of view.
But SQL Server Management Studio creates it to store the diagram data, so it also categorizes it as a system table.
You can exclude such kinda system tables using the extended attribute you mentionned.
I have a database where one table is as follows:
Owner Type | Owner Name
---------------------------------
Testing | abc, def, xyz
Testing2 | ppp
Testing3 | jkl, mno, pqr
In the SQL Report (SSRS), I would like to display something like this:
Testing owners = abc, def, xyz
Testing2 owners = ppp
Testing3 owners = jkl,m mno, pqr
How do I build a report in this way, using SQL Server Report Builder?
I understand that a simply query would work using the regular SQL Query mode. However, the difficulty I am facing is that there is only a single table cell where I need to enter the expression to be evaluated (there are more things in the table and the report, this is only a subset). I'm not sure how I can get that done.
There are at least 2 ways to do this
I would recommend doing the catenation in the report itself. Assuming you have already used the wizard to create the dataset, and the wizard has both raw columns in your report already, right click on the OwnerType detail row text box and select Expression (fx). You can then project the required display, e.g.:
=Fields!Owner_Type.Value + " owners = " + Fields!Owner_Name.Value
And then change the column name and delete the second column entirely.
The other way to do this is by projecting this directly in a Sql Query, e.g. by providing the following query by using the configure option on the DataSource:
select Owner_Type + ' owners = ' + Owner_Name as OwnerRow
from [dbo].[Own];
(you could also create a proc or view in SqlServer to do this projection and then bind the report to the proc / view).
If you
SELECT [Owner Type], [Owner Name] FROM Table
You can group by [Owner type] in a table/matrix in your SSRS report and get something that looks like
Testing
Testing2
Testing3
Then you can add what you need after that on a new column f.ex. But grouping is the way to display all [Owner type].
Edit: Suggestion to filter:
I'm a SQL Server newbie. I've tried foraging around on the web for a while but could not get my question answered. Can anyone please tell me where exactly is a view stored in SQL server 2008 database?
The pedantic answer to your question is... only Microsoft knows exactly where view metadata is physically stored. In the move from SQL 2000 to SQL 2005 (on which 2008 is based) MS got rid of direct access to system tables where views used to be literally stored (dbo.sysviews and dbo.syscomments) and added a layer of abstraction (via the hidden resources database) which means you can only access meta data about views via catalog views. INFORMATION_SCHEMA is an ANSI compliant set of catalog views. While marginally useful for their relative portability between versions, often more information is available from the sql 2008 catalog views - in this case sys.views and sys.sql_modules
Be aware that views can be created with the ENCRYPTION option set which encrypts the sys.comments record(s) that contain the SQL definition of the view. But if not encrypted, then sp_helptext [MyView] will give you a quick look at the definition.
edited as per 1st comment below, to replace "sys.comments" with "sys.sql_modules"
Note: Based on this post
http://improve.dk/archive/2012/08/27/where-does-sql-server-store-the-source-for-stored-procedures.aspx, is very likely that the definition of views are stored (also) in sys.sysobjvalues system table.
The list of all user T-SQL modules (within SQL Server 2008) can be queried using sys.sql_modules system view (link). Here, you can find the definitions of user views (column definition):
SELECT QUOTENAME(s.name)+'.'+QUOTENAME(o.name) AS full_object_name,
m.*
FROM sys.sql_modules m
JOIN sys.objects o ON m.object_id=o.object_id
JOIN sys.schemas s ON o.schema_id=s.schema_id
WHERE o.type='V' -- only view objects
ORDER BY full_object_name
If you run EXEC sp_helptext 'sys.sql_modules' you will get the source code of this system view:
CREATE VIEW sys.sql_modules AS
SELECT object_id = o.id,
definition = object_definition(o.id),
uses_ansi_nulls = sysconv(bit, o.status & 0x40000), -- OBJMOD_ANSINULLS
uses_quoted_identifier = sysconv(bit, o.status & 0x80000), -- OBJMOD_QUOTEDIDENT
is_schema_bound = sysconv(bit, o.status & 0x20000), -- OBJMOD_SCHEMABOUND
uses_database_collation = sysconv(bit, o.status & 0x100000), -- OBJMOD_USESDBCOLL
is_recompiled = sysconv(bit, o.status & 0x400000), -- OBJMOD_NOCACHE
null_on_null_input = sysconv(bit, o.status & 0x200000), -- OBJMOD_NULLONNULL
execute_as_principal_id = x.indepid
FROM sys.sysschobjs o
LEFT JOIN sys.syssingleobjrefs x ON x.depid = o.id AND x.class = 22 AND x.depsubid = 0 -- SRC_OBJEXECASOWNER
WHERE o.pclass <> 100
AND ((o.type = 'TR' AND has_access('TR', o.id, o.pid, o.nsclass) = 1)
OR (type IN ('P','V','FN','IF','TF','RF','IS') AND has_access('CO', o.id) = 1)
OR (type IN ('R','D') AND o.pid = 0))
You can see that this view queries another system object sys.sysschobjs that, I think, is the system table used to store definition of views.
Note 1: Using INFORMATION_SCHEMA.VIEWS to find definition of a view is not a reliable method because INFORMATION_SCHEMA.VIEWS.VIEW_DEFINITION column definition is convert(nvarchar(4000), object_definition(object_id)) (max. 4000 chars).
Note 2: Instead, you should use sys.sql_modules.definition column: definition = object_definition(o.id). If you look at object_definition function (link) you will see that return type is nvarchar(max).
If you mean the tables the view produces then the answer is that they aren't stored at all. A view is just a query, and that is all it stores. When you query a view the db engine just fetches your view query's results and then queries those.
DB engines can store 'materialized' views, but that's a different topic.
In a system table.
The following query will retrieve them...
SELECT TABLE_NAME as ViewName,
VIEW_DEFINITION as ViewDefinition
FROM INFORMATION_SCHEMA.Views
To view edit them normally you would look in the view folder under tables in studio manager.
You can create/edit them from this folder using the designer or write scripts.
View is a simple SQL statement that is stored in database schema (INFORMATION_SCHEMA.Views). So when ever we call the view the SQL statement gets executed and return the rows from main physical table.
You can also tell the view as a Logical table that store the defination (the sql statement) but not the result.
You can see the defination using below statement, as said by Dan above, Only if the view defination is Not encrypted:
SELECT TABLE_NAME as ViewName, VIEW_DEFINITION as ViewDefinition FROM INFORMATION_SCHEMA.Views
More details on View # MSDN.
I'm successfully extracting column definitions from databases hosted on a SQL server using the ADO Connection OpenSchema() call in its various incarnations so I can programmatically recreate those tables in another SQL database. So far, so good.
The main interaction with the above tables happens using multiple views; while OpenSchema() is able to return the column definitions for the view in the same way that it returns column definitions for a table, a crucial bit of information is missing - which table and column in the underlying tables the column in the view maps to.
I tried to access the SQL command used to create the view using ADOX Catalog Views, but it appears that the OLEDB driver for SQL Server that we're using doesn't support this functionality.
Is there any way to get at this information for the view configuration via ADO, either in a way that states "ColumnX maps to ColumnY in table Z" or in the form of the actual SQL command used to create the view?
Which version of SQL Server?
For SQL Server 2005 and later, you can obtain the SQL script used to create the view like this:
select definition
from sys.objects o
join sys.sql_modules m on m.object_id = o.object_id
where o.object_id = object_id( 'dbo.MyView')
and o.type = 'V'
This returns a single row containing the script used to create/alter the view.
Other columns in the table tell about about options in place at the time the view was compiled.
Caveats
If the view was last modified with ALTER VIEW, then the script will be an ALTER VIEW statement rather than a CREATE VIEW statement.
The script reflects the name as it was created. The only time it gets updated is if you execute ALTER VIEW, or drop and recreate the view with CREATE VIEW. If the view has been renamed (e.g., via sp_rename) or ownership has been transferred to a different schema, the script you get back will reflect the original CREATE/ALTER VIEW statement: it will not reflect the objects current name.
Some tools truncate the output. For example, the MS-SQL command line tool sqlcmd.exe truncates the data at 255 chars. You can pass the parameter -y N to get the result with N chars.
Microsoft listed the following methods for getting the a View definition: http://technet.microsoft.com/en-us/library/ms175067.aspx
USE AdventureWorks2012;
GO
SELECT definition, uses_ansi_nulls, uses_quoted_identifier, is_schema_bound
FROM sys.sql_modules
WHERE object_id = OBJECT_ID('HumanResources.vEmployee');
GO
USE AdventureWorks2012;
GO
SELECT OBJECT_DEFINITION (OBJECT_ID('HumanResources.vEmployee'))
AS ObjectDefinition;
GO
EXEC sp_helptext 'HumanResources.vEmployee';
For users of SQL 2000, the actual command that will provide this information is:
select c.text
from sysobjects o
join syscomments c on c.id = o.id
where o.name = '<view_name_here>'
and o.type = 'V'
SELECT object_definition (OBJECT_ID(N'dbo.vEmployee'))
You can get table/view details through below query.
For table :sp_help table_name
For View :sp_help view_name
SELECT definition, uses_ansi_nulls, uses_quoted_identifier, is_schema_bound
FROM sys.sql_modules
WHERE object_id = OBJECT_ID('your View Name');
This example:Views Collection, CommandText Property Example (VB)
Shows how to use ADOX to maintain VIEWS by changing COMMAND related to VIEW.
But instead using it like this:
Set cmd = cat.Views("AllCustomers").Command
' Update the CommandText of the command.
cmd.CommandText = _
"Select CustomerId, CompanyName, ContactName From Customers"
just try to use this way:
Set CommandText = cat.Views("AllCustomers").Command.CommandText
Using SQL server 2000 and Access 2003
Access Database Name - History.mdb
Access Table Name - Events
SQL Database Name - Star.mdf
SQL Table Name - Person
I want to take the field from person table, and include in Events table by using inner join
Tried Query
Select * from Events inner join person where events.id = person.id
So How to make a query for access and sql databases.
I want to make a Select query in access only. Not an sql Database.
Need Query Help?
While you can (possible, should -- why?) use a linked table, there are as ever more than one way to skin a cat. Here's another approach: put the connection details into the query test e.g. something like
SELECT *
FROM [ODBC;Driver={SQL Server};SERVER=MyServer;DATABASE=Star;UID=MyUsername;Pwd=MyPassword;].Person AS P1
INNER JOIN
[MS Access;DATABASE=C:\History;].[Events] AS E1
ON S1.seq = S2.seq
WHERE E1.id = P1.id;
You can set up a linked table in Access to your SQL Server, and the instructions on how to do so vary slightly in Access versions. Look in the help file for "Linked Table", or go here if you have Access 2007.
Once you have a linked table set up, you'll be able to access the SQL Server table in your query. Note that optimizing a linked table join takes some work.
You can create a linked table in Access, that points to the table in SQL. The rest you can achieve in the query designer.
You should add the msaccess db as a remote server.
then you can do that join