loop through all tables and delete records - sql-server

Question

I'm new to MsSql and I'm not sure if this can be done but I figured I'd ask before I want on my way with the current process..
I need to create a script that loops through all tables in a database and deletes the rows where CorporationId = "xxx". There are a few tables that do not have this column, but of my ~50 tables, only 1 or two do not.
I can individually delete the records in the table with this:
USE MyDatabase
DECLARE #CorporationId UniqueIdentifier
DECLARE #TokenId UniqueIdentifier
DECLARE #CompanyCode nChar(3)
SET #CorporationId = '52D3AEFE-8EBD-4669-8096-4596FE83BB36'
print 'Starting Web.GasOrder'
DELETE FROM Web.GasOrder
WHERE CorporationId = #CorporationId
print 'Starting Web.GasOrderNumber'
DELETE FROM Web.GasOrderNumber
WHERE CorporationId = #CorporationId
etc..
But this is getting tedious creating one for each table.
Of course, some of the tables have relationships on them.
Is there an easy way to do this or do I need to do it manually for each table?
UPDATE
Most of the options that I have tried run into problems with relationships and give me an error.

Answer 1

sp_MSForEachTable is an undocumented stored procedure which will run a command for each table in the database:
USE MyDatabase
DECLARE #CorporationId VARCHAR(50)
SET #CorporationId = '52D3AEFE-8EBD-4669-8096-4596FE83BB36'
DECLARE #Sql VARCHAR(MAX)
SET #Sql = '
IF COL_LENGTH(''?'',''CorporationId'') IS NOT NULL
BEGIN
DELETE FROM Web.?
WHERE CorporationId = ''' + #CorporationId + '''
END
'
EXEC sp_MSForEachTable #Sql

Answer 2

Here's another one... could easily be changed to a stored procedure...
Declare #corpID Nvarchar(256)
Set #corpID = 'xxx'
If Object_ID('tempdb..#tables') Is Not Null Drop Table #tables
Create Table #tables (tID Int, SchemaName Nvarchar(256), TableName Nvarchar(256))
Insert #tables
Select Row_Number() Over (Order By s.name, so.name), s.name, so.name
From sysobjects so
Join sys.schemas s
On so.uid = s.schema_id
Join syscolumns sc
On so.id = sc.id
Where so.xtype = 'u'
And sc.name = 'CorporationId'
Declare #SQL Nvarchar(Max),
#schema Nvarchar(256),
#table Nvarchar(256),
#iter Int = 1
While Exists (Select 1
From #tables)
Begin
Select #schema = SchemaName,
#table = TableName
From #tables
Where tID = #iter
If Exists (Select 1
From sysobjects o
Join sys.schemas s1
On o.uid = s1.schema_id
Join sysforeignkeys fk
On o.id = fk.rkeyid
Join sysobjects o2
On fk.fkeyid = o2.id
Join sys.schemas s2
On o2.uid = s2.schema_id
Join #tables t
On o2.name = t.TableName Collate Database_Default
And s2.name = t.SchemaName Collate Database_Default
Where o.name = #table
And s1.name = #schema)
Begin
Update t
Set tID = (Select Max(tID) From #tables) + 1
From #tables t
Where tableName = #table
And schemaName = #schema
Set #iter = #iter + 1
End
Else
Begin
Set #Sql = 'Delete t
From [' + #schema + '].[' + #table + '] t
Where CorporationId = ''' + #corpID + ''''
Exec sp_executeSQL #SQL;
Delete t
From #tables t
Where tableName = #table
And schemaName = #schema
Set #iter = #iter + 1
End
End

Answer 3

You could run a query like this:
SELECT 'DELETE FROM [' + s.name + '].[' + t.name + '] WHERE CorporationId = ''52D3AEFE-8EBD-4669-8096-4596FE83BB36'''
FROM sys.columns c
inner join sys.tables t
ON t.object_id= c.object_id
inner join sys.schemas s
ON s.schema_id = t.schema_id
where c.name = 'CorporationId'
and then either copy and paste the results into a new query window and execute the new query or iterate over the results with a cursor and execute each result with the exec statement.

Answer 4

Here is a Sql Fiddle that proves the below query
You can get the tables from this query:
SELECT Name, IsChecked = 0
INTO #Tables
FROM sys.Tables
WHERE EXISTS
(
SELECT * FROM sys.columns
WHERE object_id = OBJECT_ID(sys.Tables.Name) AND sys.columns.Name = 'blah'
)
Then, you can create a dynamic query and execute it for the tables that you found
WHILE(SELECT COUNT(*) FROM #Tables WHERE IsChecked = 0) > 0
BEGIN
SELECT TOP 1 #TableName = Name FROM #Tables WHERE IsChecked = 0
SET #DeleteQuery = 'DELETE FROM ' + #TableName + ' WHERE CorporationID = ''' + #CorporationId + ''''
EXECUTE sp_executeSQL #DeleteQuery;
UPDATE #Tables SET IsChecked = 1 WHERE Name = #TableName
END