在SQL Server 2005中，我可以在沒有設置表格屬性的情況下進行級聯刪除嗎？

Question

我有一個數據庫充滿了客戶數據。它太大了，操作起來真的很麻煩，我寧願把它減少到10％的客戶，這對發展來說是很大的。我有很多表，我不想用「ON DELETE CASCADE」來改變它們，特別是因爲這是一次性交易。

我可以做一個刪除操作，級聯所有我的表而不先設置它們嗎？如果不是，我最好的選擇是什麼？

Answer 1

結合您的建議和腳本我在網上找到，我做了會產生SQL可以運行執行級聯刪除不管ON DELETE CASCADE的過程。這可能是浪費時間，但我寫了很好。這樣做的好處在於，您可以在每行之間放置一條GO聲明，並且它不一定是一個大事務。原來是一個遞歸過程;這一個將遞歸展開到一個堆棧表中。

create procedure usp_delete_cascade (
    @base_table_name varchar(200), @base_criteria nvarchar(1000) 
) 
as begin 
    -- Adapted from http://www.sqlteam.com/article/performing-a-cascade-delete-in-sql-server-7 
    -- Expects the name of a table, and a conditional for selecting rows 
    -- within that table that you want deleted. 
    -- Produces SQL that, when run, deletes all table rows referencing the ones 
    -- you initially selected, cascading into any number of tables, 
    -- without the need for "ON DELETE CASCADE". 
    -- Does not appear to work with self-referencing tables, but it will 
    -- delete everything beneath them. 
    -- To make it easy on the server, put a "GO" statement between each line. 

    declare @to_delete table (
     id int identity(1, 1) primary key not null, 
     criteria nvarchar(1000) not null, 
     table_name varchar(200) not null, 
     processed bit not null, 
     delete_sql varchar(1000) 
    ) 

    insert into @to_delete (criteria, table_name, processed) values (@base_criteria, @base_table_name, 0) 

    declare @id int, @criteria nvarchar(1000), @table_name varchar(200) 
    while exists(select 1 from @to_delete where processed = 0) begin 
     select top 1 @id = id, @criteria = criteria, @table_name = table_name from @to_delete where processed = 0 order by id desc 

     insert into @to_delete (criteria, table_name, processed) 
      select referencing_column.name + ' in (select [' + referenced_column.name + '] from [' + @table_name +'] where ' + @criteria + ')', 
       referencing_table.name, 
       0 
      from sys.foreign_key_columns fk 
       inner join sys.columns referencing_column on fk.parent_object_id = referencing_column.object_id 
        and fk.parent_column_id = referencing_column.column_id 
       inner join sys.columns referenced_column on fk.referenced_object_id = referenced_column.object_id 
        and fk.referenced_column_id = referenced_column.column_id 
       inner join sys.objects referencing_table on fk.parent_object_id = referencing_table.object_id 
       inner join sys.objects referenced_table on fk.referenced_object_id = referenced_table.object_id 
       inner join sys.objects constraint_object on fk.constraint_object_id = constraint_object.object_id 
      where referenced_table.name = @table_name 
       and referencing_table.name != referenced_table.name 

     update @to_delete set 
      processed = 1 
     where id = @id 
    end 

    select 'print ''deleting from ' + table_name + '...''; delete from [' + table_name + '] where ' + criteria from @to_delete order by id desc 
end 

exec usp_delete_cascade 'root_table_name', 'id = 123' 

Answer 2

我通常只是手寫查詢來刪除我不想要的記錄，並將其保存爲.sql文件以供將來參考。僞代碼：從主表，我想刪除到一個臨時表

寫出每個相關表，加入到臨時表中刪除查詢記錄

1. 選擇ID的。
2. 爲連接到我的臨時表的主表寫入刪除查詢。

Answer 3

我的建議是繼續編寫一個腳本，該腳本會將刪除層疊添加到數據庫中的每個關係，同時導出修改關係的列表。然後，您可以反轉該過程並刪除列表中每個表上的on delete cascade命令。

Answer 4

就個人而言，如果你要離開生產記錄，我也會留下他們的發展。否則，你可能會編寫在記錄集很小時工作正常但在遇到真實記錄集時超時的代碼。

但是，如果您決定這樣做，我會首先將要從主表中刪除的記錄的id字段複製到工作表中。然後，我將把每個相關表格寫入一個刪除連接到該工作表，以僅刪除這些記錄。用父表完成。確保將這些內容寫入腳本並在下次希望與測試數據做類似的事情時進行保存，您可以輕鬆運行它，而無需弄清楚需要從中刪除記錄的重複表是什麼。

Answer 5

進入SQL Server Management Studio並右鍵單擊該數據庫。選擇任務 - >生成腳本。點擊下一步兩次。在「選項」窗口中，選擇將其設置爲僅生成CREATE語句，並將所有內容都設置爲除外部鍵之外的False。點擊下一步。選擇表格並再次單擊下一步。單擊「全選」按鈕，然後單擊下一步然後單擊完成並將腳本發送到您選擇的查詢窗口或文件（不要使用剪貼板，因爲它可能是一個大腳本）。 現在刪除所有添加表的腳本，並且應該留下腳本來創建您的外鍵。

製作該腳本的副本，因爲這是您將數據庫還原到當前狀態的方式。使用搜索和替換將ON DELETE CASCADE添加到每個約束的末尾。這可能會有所不同，這取決於您的FK目前如何設置，您可能需要進行一些手動編輯。

重複腳本生成，但是這次只設置它只生成DROP語句。 一定要手動刪除生成的表滴。運行下拉菜單，然後運行已編輯的創建，使它們全部級聯刪除。執行刪除操作，再次運行drop腳本，然後運行在開始時保存的腳本。

另外 - 做你的數據庫第一的備份！即使它只是一個開發數據庫，​​如果腳本的一部分不完全正確，它也會爲您節省一些頭痛。

希望這會有所幫助！順便提一下，你應該使用完整的測試數據做一些測試，但是我可以看到爲什麼你可能不需要這些測試來進行初始開發。只要不要忘記將其作爲質量保證的一部分。

Answer 6

除非您想維護Chris提出的所有相關查詢，否則ON DELETE CASCADE是迄今最快和最直接的解決方案。如果你不希望它是永久性的，你爲什麼不有一些T-SQL代碼，將打開和關閉喜歡這裏

1. 刪除原始Tbl_A_MyFK約束（不ON DELETE該選項CASCADE）

   ALTER TABLE Tbl_A DROP CONSTRAINT Tbl_A_MyFK

2. 設置約束Tbl_A_MyFK與ON DELETE CASCADE

   ALTER TABLE Tbl_A ADD CONSTRAINT Tbl_A_MyFK FOREIGN KEY (MyFK) REFERENCES Tbl_B(Column) ON DELETE CASCADE

3. 在這裏你可以做你刪除

   DELETE FROM Tbl_A WHERE ...

4. 放下你的約束Tbl_A_MyFK

   ALTER TABLE Tbl_A DROP CONSTRAINT Tbl_A_MyFK

5. 設置約束Tbl_A_MyFK沒有ON DELETE CASCADE

   ALTER TABLE Tbl_A ADD CONSTRAINT Tbl_A_MyFK FOREIGN KEY (MyFK) REFERENCES (Tbl_B)

Answer 7

後，選擇你必須建立並執行實際刪除

declare @deleteSql nvarchar(1200) 
declare delete_cursor cursor for 
select table_name, criteria 
from @to_delete 
order by id desc 

open delete_cursor 

fetch next from delete_cursor 
into @table_name, @criteria 

while @@fetch_status = 0 
begin 
select @deleteSql = 'delete from ' + @table_name + ' where ' + @criteria 
--print @deleteSql 
-- exec sp_execute @deleteSql 
EXEC SP_EXECUTESQL @deleteSql 

fetch next from delete_cursor 
into @table_name, @criteria 
end 
close delete_cursor 
deallocate delete_cursor 

Answer 8

以接受的答案遠一點，我有必要在不同的模式來做到這一點跨表。我已更新腳本以在輸出的刪除腳本中包含模式。

CREATE PROCEDURE usp_delete_cascade (
     @base_table_schema varchar(100), @base_table_name varchar(200), @base_criteria nvarchar(1000) 
) 
as begin 

     -- Expects the name of a table, and a conditional for selecting rows 
     -- within that table that you want deleted. 
     -- Produces SQL that, when run, deletes all table rows referencing the ones 
     -- you initially selected, cascading into any number of tables, 
     -- without the need for "ON DELETE CASCADE". 
     -- Does not appear to work with self-referencing tables, but it will 
     -- delete everything beneath them. 
     -- To make it easy on the server, put a "GO" statement between each line. 

     declare @to_delete table (
       id int identity(1, 1) primary key not null, 
       criteria nvarchar(1000) not null, 
       table_schema varchar(100), 
       table_name varchar(200) not null, 
       processed bit not null, 
       delete_sql varchar(1000) 
     ) 

     insert into @to_delete (criteria, table_schema, table_name, processed) values (@base_criteria, @base_table_schema, @base_table_name, 0) 

     declare @id int, @criteria nvarchar(1000), @table_name varchar(200), @table_schema varchar(100) 
     while exists(select 1 from @to_delete where processed = 0) begin 
       select top 1 @id = id, @criteria = criteria, @table_name = table_name, @table_schema = table_schema from @to_delete where processed = 0 order by id desc 

       insert into @to_delete (criteria, table_schema, table_name, processed) 
         select referencing_column.name + ' in (select [' + referenced_column.name + '] from [' + @table_schema + '].[' + @table_name +'] where ' + @criteria + ')', 
           schematable.name, 
           referencing_table.name, 
           0 
         from sys.foreign_key_columns fk 
           inner join sys.columns referencing_column on fk.parent_object_id = referencing_column.object_id 
             and fk.parent_column_id = referencing_column.column_id 
           inner join sys.columns referenced_column on fk.referenced_object_id = referenced_column.object_id 
             and fk.referenced_column_id = referenced_column.column_id 
           inner join sys.objects referencing_table on fk.parent_object_id = referencing_table.object_id 
           inner join sys.schemas schematable on referencing_table.schema_id = schematable.schema_id 
           inner join sys.objects referenced_table on fk.referenced_object_id = referenced_table.object_id 
           inner join sys.objects constraint_object on fk.constraint_object_id = constraint_object.object_id 
         where referenced_table.name = @table_name 
           and referencing_table.name != referenced_table.name 

       update @to_delete set 
         processed = 1 
       where id = @id 
     end 

     select 'print ''deleting from ' + table_name + '...''; delete from [' + table_schema + '].[' + table_name + '] where ' + criteria from @to_delete order by id desc 
end 

exec usp_delete_cascade 'schema', 'RootTable', 'Id = 123' 
exec usp_delete_cascade 'schema', 'RootTable', 'GuidId = ''A7202F84-FA57-4355-B499-1F8718E29058''' 

Answer 9

凱文職位是不完整的，他的T-SQL SP只打印命令，執行這些命令，最後末尾添加此

DECLARE @commandText VARCHAR(8000) 
     DECLARE curDeletes CURSOR FOR 
      select 'delete from [' + table_name + '] where ' + criteria from @to_delete order by id desc 

     OPEN curDeletes 
     FETCH NEXT FROM curDeletes 
     INTO 
      @commandText 

     WHILE(@@FETCH_STATUS=0) 
     BEGIN 
      EXEC (@commandText) 
      FETCH NEXT FROM curDeletes INTO @commandText 
     END 
     CLOSE curDeletes 
     DEALLOCATE curDeletes 

Answer 10

之前，這裏有一個人口稀少的優化版本接受的答案的數據模型。它在將它添加到刪除列表之前檢查FK鏈中是否存在數據。我用它來清理測試數據。

不要在活動的事務性數據庫中使用它 - 它會鎖住太長時間。

/* 
-- ============================================================================ 
-- Purpose: Performs a cascading hard-delete. 
--   Not for use on an active transactional database- it holds locks for too long. 
--   (http://stackoverflow.com/questions/116968/in-sql-server-2005-can-i-do-a-cascade-delete-without-setting-the-property-on-my) 
-- eg: 
exec dbo.hp_Common_Delete 'tblConsumer', 'Surname = ''TestDxOverdueOneReviewWm''', 1 
-- ============================================================================ 
*/ 
create proc [dbo].[hp_Common_Delete] 
(
    @TableName sysname, 
    @Where nvarchar(4000), -- Shouldn't include 'where' keyword, e.g. Surname = 'smith', NOT where Surname = 'smith' 
    @IsDebug bit = 0 
) 
as 
set nocount on 

begin try 
    -- Prepare tables to store deletion criteria. 
    -- #tmp_to_delete stores criteria that is tested for results before being added to #to_delete 
    create table #to_delete 
    (
     id int identity(1, 1) primary key not null, 
     criteria nvarchar(4000) not null, 
     table_name sysname not null, 
     processed bit not null default(0) 
    ) 
    create table #tmp_to_delete 
    (
     id int primary key identity(1,1), 
     criteria nvarchar(4000) not null, 
     table_name sysname not null 
    ) 

    -- Open a transaction (it'll be a long one- don't use this on production!) 
    -- We need a transaction around criteria generation because we only 
    -- retain criteria that has rows in the db, and we don't want that to change under us. 
    begin tran 
     -- If the top-level table meets the deletion criteria, add it 
     declare @Sql nvarchar(4000) 
     set @Sql = 'if exists(select top(1) * from ' + @TableName + ' where ' + @Where + ') 
      insert #to_delete (criteria, table_name) values (''' + replace(@Where, '''', '''''') + ''', ''' + @TableName + ''')' 
     exec (@Sql) 

     -- Loop over deletion table, walking foreign keys to generate delete targets 
     declare @id int, @tmp_id int, @criteria nvarchar(4000), @new_criteria nvarchar(4000), @table_name sysname, @new_table_name sysname 
     while exists(select 1 from #to_delete where processed = 0) 
     begin 
      -- Grab table/criteria to work on 
      select top(1) @id = id, 
        @criteria = criteria, 
        @table_name = table_name 
      from #to_delete 
      where processed = 0 
      order by id desc 

      -- Insert all immediate child tables into a temp table for processing 
      insert #tmp_to_delete 
      select referencing_column.name + ' in (select [' + referenced_column.name + '] from [' + @table_name +'] where ' + @criteria + ')', 
        referencing_table.name 
      from sys.foreign_key_columns fk 
        inner join sys.columns referencing_column on fk.parent_object_id = referencing_column.object_id 
          and fk.parent_column_id = referencing_column.column_id 
        inner join sys.columns referenced_column on fk.referenced_object_id = referenced_column.object_id 
          and fk.referenced_column_id = referenced_column.column_id 
        inner join sys.objects referencing_table on fk.parent_object_id = referencing_table.object_id 
        inner join sys.objects referenced_table on fk.referenced_object_id = referenced_table.object_id 
        inner join sys.objects constraint_object on fk.constraint_object_id = constraint_object.object_id 
      where referenced_table.name = @table_name 
        and referencing_table.name != referenced_table.name 

      -- Loop on child table criteria, and insert them into delete table if they have records in the db 
      select @tmp_id = max(id) from #tmp_to_delete 
      while (@tmp_id >= 1) 
      begin 
       select @new_criteria = criteria, @new_table_name = table_name from #tmp_to_delete where id = @tmp_id 
       set @Sql = 'if exists(select top(1) * from ' + @new_table_name + ' where ' + @new_criteria + ') 
        insert #to_delete (criteria, table_name) values (''' + replace(@new_criteria, '''', '''''') + ''', ''' + @new_table_name + ''')' 
       exec (@Sql) 

       set @tmp_id = @tmp_id - 1 
      end 
      truncate table #tmp_to_delete 

      -- Move to next record 
      update #to_delete 
      set  processed = 1 
      where id = @id 
     end 

     -- We have a list of all tables requiring deletion. Actually delete now. 
     select @id = max(id) from #to_delete 
     while (@id >= 1) 
     begin 
      select @criteria = criteria, @table_name = table_name from #to_delete where id = @id 
      set @Sql = 'delete from [' + @table_name + '] where ' + @criteria 
      if (@IsDebug = 1) print @Sql 
      exec (@Sql) 

      -- Next record 
      set @id = @id - 1 
     end 
    commit 
end try 

begin catch 
    -- Any error results in a rollback of the entire job 
    if (@@trancount > 0) rollback 

    declare @message nvarchar(2047), @errorProcedure nvarchar(126), @errorMessage nvarchar(2048), @errorNumber int, @errorSeverity int, @errorState int, @errorLine int 
    select @errorProcedure = isnull(error_procedure(), N'hp_Common_Delete'), 
      @errorMessage = isnull(error_message(), N'hp_Common_Delete unable to determine error message'), 
      @errorNumber = error_number(), @errorSeverity = error_severity(), @errorState = error_state(), @errorLine = error_line() 

    -- Prepare error information as it would be output in SQL Mgt Studio 
    declare @event nvarchar(2047) 
    select @event = 'Msg ' + isnull(cast(@errorNumber as varchar), 'null') + 
         ', Level ' + isnull(cast(@errorSeverity as varchar), 'null') + 
         ', State ' + isnull(cast(@errorState as varchar), 'null') + 
         ', Procedure ' + isnull(@errorProcedure, 'null') + 
         ', Line ' + isnull(cast(@errorLine as varchar), 'null') + 
         ': ' + isnull(@errorMessage, '@ErrorMessage null') 
    print @event 

    -- Re-raise error to ensure admin/job runners understand there was a failure 
    raiserror(@errorMessage, @errorSeverity, @errorState) 
end catch 

Answer 11

croisharp的回答擴張採取觸發器考慮，即禁止所有影響觸發器，刪除行，並啓用觸發器，即感知模式的解決方案。

CREATE PROCEDURE usp_delete_cascade (
@base_table_schema varchar(100), 
@base_table_name varchar(200), 
@base_criteria nvarchar(1000) 
) 
as begin 

    -- Expects the name of a table, and a conditional for selecting rows 
    -- within that table that you want deleted. 
    -- Produces SQL that, when run, deletes all table rows referencing the ones 
    -- you initially selected, cascading into any number of tables, 
    -- without the need for "ON DELETE CASCADE". 
    -- Does not appear to work with self-referencing tables, but it will 
    -- delete everything beneath them. 
    -- To make it easy on the server, put a "GO" statement between each line. 

    declare @to_delete table (
      id int identity(1, 1) primary key not null, 
      criteria nvarchar(1000) not null, 
      table_schema varchar(100), 
      table_name varchar(200) not null, 
      processed bit not null, 
      delete_sql varchar(1000) 
    ) 

    insert into @to_delete (criteria, table_schema, table_name, processed) values (@base_criteria, @base_table_schema, @base_table_name, 0) 

    declare @id int, @criteria nvarchar(1000), @table_name varchar(200), @table_schema varchar(100) 
    while exists(select 1 from @to_delete where processed = 0) begin 
      select top 1 @id = id, @criteria = criteria, @table_name = table_name, @table_schema = table_schema from @to_delete where processed = 0 order by id desc 

      insert into @to_delete (criteria, table_schema, table_name, processed) 
        select referencing_column.name + ' in (select [' + referenced_column.name + '] from [' + @table_schema + '].[' + @table_name +'] where ' + @criteria + ')', 
          schematable.name, 
          referencing_table.name, 
          0 
        from sys.foreign_key_columns fk 
          inner join sys.columns referencing_column on fk.parent_object_id = referencing_column.object_id 
            and fk.parent_column_id = referencing_column.column_id 
          inner join sys.columns referenced_column on fk.referenced_object_id = referenced_column.object_id 
            and fk.referenced_column_id = referenced_column.column_id 
          inner join sys.objects referencing_table on fk.parent_object_id = referencing_table.object_id 
          inner join sys.schemas schematable on referencing_table.schema_id = schematable.schema_id 
          inner join sys.objects referenced_table on fk.referenced_object_id = referenced_table.object_id 
          inner join sys.objects constraint_object on fk.constraint_object_id = constraint_object.object_id 
        where referenced_table.name = @table_name 
          and referencing_table.name != referenced_table.name 

      update @to_delete set 
        processed = 1 
      where id = @id 
    end 

    select 'print ''deleting from ' + table_name + '...''; delete from [' + table_schema + '].[' + table_name + '] where ' + criteria from @to_delete order by id desc 

    DECLARE @commandText VARCHAR(8000), @triggerOn VARCHAR(8000), @triggerOff VARCHAR(8000) 
    DECLARE curDeletes CURSOR FOR 
     select 
      'DELETE FROM [' + table_schema + '].[' + table_name + '] WHERE ' + criteria, 
      'ALTER TABLE [' + table_schema + '].[' + table_name + '] DISABLE TRIGGER ALL', 
      'ALTER TABLE [' + table_schema + '].[' + table_name + '] ENABLE TRIGGER ALL' 
     from @to_delete order by id desc 

    OPEN curDeletes 
    FETCH NEXT FROM curDeletes INTO @commandText, @triggerOff, @triggerOn 

    WHILE(@@FETCH_STATUS=0) 
    BEGIN 
     EXEC (@triggerOff) 
     EXEC (@commandText) 
     EXEC (@triggerOn) 
     FETCH NEXT FROM curDeletes INTO @commandText, @triggerOff, @triggerOn 
    END 
    CLOSE curDeletes 
    DEALLOCATE curDeletes 
end 

Answer 12

這個腳本有兩個問題：1。 必須註明條件1 = 1，以刪除所有表的基礎。 2.這隻創建與基表的直接關係。如果最終的表具有另一個表父關係時，刪除失敗

DELETE FROM [DBO]。[表2] WHERE表格ID中（選擇[ID]從[DBO]。[表3]，其中1 = 1）

如果表2有一個父關係表1

Answer 13

這裏發佈一個腳本，該腳本將與外鍵一起使用，該腳本包含多個列。

create procedure usp_delete_cascade (
@TableName varchar(200), @Where nvarchar(1000) 
) as begin 

declare @to_delete table (
    id int identity(1, 1) primary key not null, 
    criteria nvarchar(1000) not null, 
    table_name varchar(200) not null, 
    processed bit not null default(0), 
    delete_sql varchar(1000) 
) 
      DECLARE @MyCursor CURSOR 

declare   @referencing_column_name varchar(1000) 
declare   @referencing_table_name varchar(1000) 
declare @Sql nvarchar(4000) 
insert into @to_delete (criteria, table_name) values ('', @TableName) 


declare @id int, @criteria nvarchar(1000), @table_name varchar(200) 
while exists(select 1 from @to_delete where processed = 0) begin 
    select top 1 @id = id, @criteria = criteria, @table_name = table_name from @to_delete where processed = 0 order by id desc 
     SET @MyCursor = CURSOR FAST_FORWARD 
     FOR 
     select referencing_column.name as column_name, 
      referencing_table.name as table_name 
     from sys.foreign_key_columns fk 
      inner join sys.columns referencing_column on fk.parent_object_id = referencing_column.object_id 
       and fk.parent_column_id = referencing_column.column_id 
      inner join sys.columns referenced_column on fk.referenced_object_id = referenced_column.object_id 
       and fk.referenced_column_id = referenced_column.column_id 
      inner join sys.objects referencing_table on fk.parent_object_id = referencing_table.object_id 
      inner join sys.objects referenced_table on fk.referenced_object_id = referenced_table.object_id 
      inner join sys.objects constraint_object on fk.constraint_object_id = constraint_object.object_id 
     where referenced_table.name = @table_name 
      and referencing_table.name != referenced_table.name 

     OPEN @MyCursor 
     FETCH NEXT FROM @MYCursor 
     INTO @referencing_column_name, @referencing_table_name 

     WHILE @@FETCH_STATUS = 0 

     BEGIN 
      PRINT @referencing_column_name 
      PRINT @referencing_table_name 
        update @to_delete set criteria = criteria + ' AND '+@table_name+'.'+@referencing_column_name+'='+ @referencing_table_name+'.'+@referencing_column_name 
        where table_name = @referencing_table_name 

        if(@@ROWCOUNT = 0) 
        BEGIN 
          --if(@id <> 1) 
          --BEGIN 
           insert into @to_delete (criteria, table_name) 
           VALUES(' LEFT JOIN '+@table_name+' ON '+@table_name+'.'+@referencing_column_name+'='+ @referencing_table_name+'.'+@referencing_column_name+ @criteria, 
           @referencing_table_name 
           ) 
          --END 
          --ELSE 
          --BEGIN 
           --insert into @to_delete (criteria, table_name) 
           --VALUES(' LEFT JOIN '+@table_name+' ON '+@table_name+'.'+@referencing_column_name+'='+ @referencing_table_name+'.'+@referencing_column_name, 
           --@referencing_table_name 
           --) 
          --END 
        END 
         FETCH NEXT FROM @MYCursor 
      INTO @referencing_column_name, @referencing_table_name 
     END 


     CLOSE @MyCursor 
     DEALLOCATE @MyCursor 
    update @to_delete set 
     processed = 1 
    where id = @id 
end 

--select 'print ''deleting from ' + table_name + '...''; delete from [' + table_name + '] where ' + criteria from @to_delete order by id desc 

--select id, table_name, criteria, @Where from @to_delete order by id desc 

select @id = max(id) from @to_delete 
while (@id >= 1) 
begin 
    select @criteria = criteria, @table_name = table_name from @to_delete where id = @id 
    set @Sql = 'delete [' + @table_name + '] from [' + @table_name + '] ' + @criteria+' WHERE '+@Where 
    exec (@Sql) 
    PRINT @Sql 

    -- Next record 
    set @id = @id - 1 
end 
end