I'm using a piece of code (via Excel VBA) which seems to be in several spots around the internet. The intention is to find all tables which contain a certain field/column.
This is my SQL string:
SELECT t.name AS table_name,
SCHEMA_NAME(schema_id) AS schema_name,
c.name AS column_name FROM sys.tables AS t
INNER JOIN sys.columns c ON t.OBJECT_ID = c.OBJECT_ID
WHERE c.name LIKE 'MyCol'
ORDER BY schema_name, table_name;
This works perfectly for most tables, but not views. Is there a way to look within views as well?
If anyone has any ideas, I'd really appreciate feedback. I hope this all makes sense as I am fairly new to SQL, but I have been doing VBA for a long time. Thanks so much in advance!
Use sysobjects instead of systables
sysobjects is most DML based objects (except triggers) whereas systables is just well... tables
http://technet.microsoft.com/en-us/library/ms190324.aspx
and becareful of sys.objects vs sysobjects.
http://social.msdn.microsoft.com/Forums/sqlserver/en-US/a965676e-d4d9-4365-ad0a-58ca26ec4701/differenece-between-sysobjects-and-sysobjects-in-sql-server-2005-?forum=sqlkjmanageability
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
Basically I ve read a couple of questions regarding this matter on StackOverflow and there have been a lot of different opinions regarding the right answer. Could someone give a definitive answer to this , at least when it comes to SQL Server 2008 and upwards?
Also the reason why I am asking is because I would like to input the name of a table or field (table column) which would result in listing all the stored procedures with a dependency on the value entered . How would I go about doing this? This is my code so far.
SELECT *
FROM sys.sql_dependencies d
INNER JOIN sys.objects o
ON d.object_id = o.object_id
INNER JOIN sys.objects p
ON d.referenced_major_id = p.object_id
WHERE o.type_desc='SQL_STORED_PROCEDURE' and o.name LIKE
'%%' AND p.name LIKE '%%';
So I found that this worked for me as it allowed me to search through any fields only through my stored procedures, hope this helps others:
SELECT DISTINCT OBJECT_NAME(OBJECT_ID), object_definition(OBJECT_ID)
FROM sys.Procedures
WHERE object_definition(OBJECT_ID) LIKE '%' + #SearchItem + '%' `
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.
Given a column name how can I find
which tables in database contain that
column ?
or alternatively
How can I find that particular column
exists for all tables in Database ?
Note: Kindly explain answers with Examples as that I get most knowledge from the answer.
Edit: I am using MySQL Database.
SELECT * FROM information_schema.columns WHERE COLUMN_NAME = 'mycolumn'
Depends on the database you are using. Many database systems expose a set of tables of views that contain details of the schema. For example, you can get schema information from the SYSTABLE and SYSCOLUMN views in Sybase ASA.
in SQL Server:
select distinct t.name
from sys.Columns c
inner join sys.tables t on c.object_id = t.object_id
where c.name = 'YOUR_COLUMNNAME'