I know this question has been addressed elsewhere, but I cannot figure this out.
I have this view:
SELECT t.name AS 'TableName'
,c.name AS 'ColumnName'
,SEP.VALUE as 'DETAILS'
FROM sys.columns c
JOIN sys.tables t ON c.object_id = t.object_id
left join sys.extended_properties sep on t.object_id = sep.major_id
and c.column_id = sep.minor_id
and sep.name = 'MS_Description'
And when I run this query, I get the expected results:
SELECT * FROM [VIEW] WHERE DETAILS IS NOT NULL
However, There was a description I added to one of the columns through the table designer that I later removed. My issue is that this row still returns with my query, with DETAILS displayed as an empty string. I would like for this row to no longer show up, so I ran:
UPDATE sys.extended_properties SET VALUE=null WHERE major_id=1781581385 AND minor_id=4
To which I get the following error:
Msg 259, Level 16, State 1, Line 12
Ad hoc updates to system catalogs are not allowed.
I have tried Setting the Database to single user, as suggested by Martin1 here:
https://ask.sqlservercentral.com/questions/40909/ad-hoc-update-to-system-catalogs-is-not-supported.html
I feel I am missing something simple, and would appreciate any feedback. Again, I apologize for the duplicate thread.
Related
I want to count tables that have a specific column name. For instance, dbo.Management has 300 tables. Some tables have ProtectionKey column, and others don't.
I need a list of all the tables that have that column ProtectionKey, or at least a count of them.
I have looked into similar examples but those are either counting ALL columns in a DB or ALL columns in one table.
I would personally use the sys objects for this, as INFORMATION_SCHEMA can return incorrect information:
SELECT s.[name] AS SchemaName,
t.[name] AS TableName
FROM sys.schemas s
JOIN sys.tables t ON s.schema_id = t.schema_id
JOIN sys.columns c ON t.object_id = c.object_id
WHERE c.[name] = N'ProtectionKey';
Use INFORMATION_SCHEMA.COLUMNS:
select c.*
from INFORMATION_SCHEMA.COLUMNS c
where column_name = 'ProtectionKey';
This has many columns. The ones you want are TABLE_NAME and TABLE_SCHEMA.
Also, this only works in one database at a time, so you need to run it in each database where you want to search for the tables.
When I am using the below SQL statement to retrieve the column information of a SQL Server database. I am getting more columns than there actually are I presume this is because of the system columns that are there also.
SELECT
c.name Field,
t.name Type,
c.Precision,
c.Scale,
c.max_length,
c.is_nullable,
c.collation_name
FROM
sys.columns c
INNER JOIN
sys.types t ON t.system_type_id = c.system_type_id
WHERE
object_id = OBJECT_ID('SOPOrders')
You will see the above query is producing ten Order Memos when in fact their should only be the one the var char I still want to be able to report back the prevision dataype maxlength and the null able factor so what is wrong with the above query please.
There may be a couple of reasons for that. First of all, you are joining types by wrong condition - you should use user_type_id instead of system_type_id on both sides. The latter gives you the underlying built-in type which was used as a basis of a user-defined one. See this query, for example:
select * from sys.types t where t.user_type_id != t.system_type_id;
Another possible thing is that the table has a sparse column set, but I might be wrong here.
And, of course, make sure you are actually querying the information about the right table - always include the schema name qualifier, along with the object name, such as:
WHERE object_id=object_id('dbo.SOPOrders')
Failure to do so will not result in duplication you observe, but following it will save you a lot of time trying to figure out the cause of intermittent inconsistencies, when you will have objects with the same name in different schemas.
Why not using Information_Schema.COLUMNS instead??
SELECT *
FROM INFORMATION_SCHEMA.COLUMNS
WHERE TABLE_NAME = 'SOPOrders'
Or try to join on
ON c.user_type_id = t.user_type_id
instead of
ON t.system_type_id=c.system_type_id
So, I am working on a project where I need to find all tables that have the column xyz, and then remove all rows from such tables if the updated_at date for that row from that table is older than some duration.
I got the list of all tables from SQL Server like this:
SELECT
t.name AS table_name
FROM
sys.tables AS t
INNER JOIN
sys.columns c ON t.object_id = c.object_id
WHERE
c.name = 'xyz';
Now I want to use each of the tables returned from this query to DELETE all rows from these tables which satisfy some criteria. Can someone help me with the 'Nested query' please?
What you're contemplating isn't going to work; you need to explicitly specify which table you are deleting from in a delete statement.
My approach would be to use your query to dynamically generate the delete statements, then save the output of your query in a file, and run the file. This also gives you a chance to review and double-check the deletes before you run them, which is a good idea when you're making large-scale data changes like these.
select
'delete from ' + t.name + ' where updated_at <= ''2013-01-01'';'
from
sys.tables t
where
exists (select null from sys.columns c where c.object_id = t.object_id and c.name = 'xyz')
http://sqlfiddle.com/#!3/475c0/2
With C# and SQL Server 2005 and by using DbConnection.GetSchema() method, I want to get all a table's columns (not of views) only. I have found two collection names related to this
Columns that returns table and views' columns
ViewColumns returns all the view's columns
Neither of above two returns table columns only, nor they have any property to filter Table-columns.
Any help is respected.
I don't see any easy way to do this with this particular API you're trying to achieve this with - but why not just use a query like this to get your information?
SELECT
c.name AS 'ColumName',
ty.Name AS 'TypeName',
c.max_length,
c.is_identity,
c.is_nullable,
t.name AS 'TableName'
FROM sys.columns c
INNER JOIN sys.types ty ON c.user_type_id = ty.user_type_id
INNER JOIN sys.tables t ON c.object_id = t.object_id
Just load that into a SqlCommand and execute it against the open connection you have and read the result into some DataTable or other structure for your use. This gives you only table columns - and all of them.
When I run this script to search particular text in sys.columns and I get a lot of "dbo.syncobj_0x3934443438443332" like rows.
SELECT c.name, s.name + '.' + o.name
FROM sys.columns c
INNER JOIN sys.objects o ON c.object_id=o.object_id
INNER JOIN sys.schemas s ON o.schema_id=s.schema_id
WHERE c.name LIKE '%text%'
If I get it right, they are replication objects. Is it so? Can i just throw them away from my query just like o.name NOT LIKE '%syncobj%' or there's another way?
Thank you.
I've found a solution. Doesn't know, if it's the best one or not.
SELECT c.name, s.name + '.' + o.name
FROM sys.columns c
INNER JOIN sys.objects o ON c.object_id=o.object_id
INNER JOIN sys.schemas s ON o.schema_id=s.schema_id
WHERE c.name LIKE '%text%' AND o.type = 'U'
The result is fine now. As I said syncobj's are replication objects and they don't have a meaning for us. They're used for replication purposes only.
http://www.developmentnow.com/g/114_2007_12_0_0_443938/syncobj-views.htm
EDIT:
Forgot to add, syncobj's are stored in DB as Views, so if you need list of views, you'll probably need to ignore them as I did in my question.
While checking difference between syncobj's and my views, the only difference is is_ms_shipped column. For syncobj it's 1, for others 0. It means that syncobj views are created by system.
P.S. I'll wait for some time and if nobody gives another answer, I'll accept mine.
When you create a replication that does not include all the fields or other meta data changes from the original table. If you do a generate script from a publication it will show you how it is created (see below). The view provide a object to generate the bcp extracts during the initial snapshots.
Here is an example
-- Adding the article synchronization object exec sp_articleview #publication = N'publication_data', #article = N'tablename',
#view_name = N'syncobj_0x4239373642443436', #filter_clause = N'',
#force_invalidate_snapshot = 1, #force_reinit_subscription = 1 GO
P.S. I recently had a problem when the I dropped replication, it failed to drop these and then you have to manually drop the system views to reuse a replication script. Giving a error message
Msg 2714, Level 16, State 3: There is already an object named
'syncobj_0x3437324238353830' in the database.
Which caused the bcp to fail during the snapshot.