Update tables with same name different schemas - sql

Question

Using SQL Server and T-SQL, how can I update ALL tables tables with a specific name but different schemas under the same database?
:Update:
The updates include adding/deleting/modifying columns as well as changing specific values of rows.
I want to be able to deploy changes to a table across all schemas. Using the SQL Server Management Studio table designer, when I do a change and save, it allows me to save a script that can be used to deploy those changes to a different table. I want to be able to use that script on all tables with that specific name across all schemas.
:Update 2:
There reason for this request is that I want to ensure that updating a specific table across multiple schemas is easy to do. In the future, my application will undoubtedly change and if I see that it is difficult or inefficient to update schemas then I will opt to use something else.
Below is what I tried:
DECLARE #update_sql NVARCHAR(max)
DECLARE #table_name VARCHAR(45)
DECLARE c_tables CURSOR FOR
SELECT t.table_name
FROM INFORMATION_SCHEMA.TABLES t
WHERE t.table_name = 'TestTable'
AND t.table_catalog = 'MyDataBase'
OPEN c_tables
FETCH c_tables INTO #table_name
WHILE ##Fetch_Status = 0
BEGIN
SET #update_sql = N'ALTER TABLE '+#table_name+' ADD ColumnThree nvarchar(50) NULL'
EXEC sp_executesql #update_sql
END
CLOSE c_tables
DEALLOCATE c_tables
Running this generates the following error:
Cannot find the object "TestTable" because it does not exist or you do not have permissions.
The table exists and I'am running under dbo which is the schema owner.
I also noticed the query takes sometime to run even with only 7 tables in the database and 3 schemas used on those tables. Would it be more efficient to just login with each schema's owner and run a generic script? Each schema owner would only have access to their respective schema and tables.

Answer 1

On SQL Server 2005+, you can use INFORMATION_SCHEMA.TABLES to get a list of tables within a database:
SELECT t.table_name,
t.table_schema
FROM INFORMATION_SCHEMA.TABLES t
WHERE t.table_name = 'Table_1'
AND t.table_catalog = 'your_database'
But you didn't specify what updating you need - DML or DDL...
Update
DECLARE #update_sql NVARCHAR(max)
DECLARE #table_name VARCHAR(45)
DECLARE c_tables CURSOR FOR
SELECT t.table_name
FROM INFORMATION_SCHEMA.TABLES t
WHERE t.table_name = 'Table_1'
AND t.table_catalog = 'your_database'
OPEN c_tables
FETCH c_tables INTO #table_name
WHILE ##Fetch_Status = 0
BEGIN
SET #update_sql = N'UPDATE #table_name SET ...'
EXEC sp_executesql #update_sql
SET #update_sql = N'ALTER TABLE #table_name ...'
EXEC sp_executesql #update_sql
END
CLOSE c_tables
DEALLOCATE c_tables

Answer 2

You can use sp_MSforeachtable if the action will be the same on all (I'd obviously put some pretty robust error handling and rollback facilities into the scripts first)
exec sp_MSforeachtable
'
if parsename(''?'',1) = ''TargetTableName''
begin
update ? set ColumnToUpdate=NewValue;
execute sp_rename N''?.newname'', N''obsoletename'', ''column'' ;
alter table ? add newcol int null;
alter table ? drop column oldcol;
end'