SqlServer批量清理指定数据库中所有数据
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在实际应用中,当我们准备把一个项目移交至客户手中使用时,我们需要把库中所有表先前的测试数据清空,以给客户一个干净的数据库,如果涉及的表很多,要一一的清空,不仅花费时间,还容易出错以及漏删,在这儿我提供了一个方法,可快捷有效的清空指定数据库所有表的数据。仅供参考,欢迎交流不同意见。
--Remove all data from a database
SET NOCOUNT ON
--Tables to ignore
DECLARE @IgnoreTables
TABLE (TableName varchar(512))
INSERT INTO @IgnoreTables (TableName) VALUES ('sysdiagrams')
DECLARE @AllRelationships
TABLE (ForeignKey varchar(512)
,TableName varchar(512)
,ColumnName varchar(512)
,ReferenceTableName varchar(512)
,ReferenceColumnName varchar(512)
,DeleteRule varchar(512))
INSERT INTO @AllRelationships
SELECT f.name AS ForeignKey,
OBJECT_NAME(f.parent_object_id) AS TableName,
COL_NAME(fc.parent_object_id,
fc.parent_column_id) AS ColumnName,
OBJECT_NAME (f.referenced_object_id) AS ReferenceTableName,
COL_NAME(fc.referenced_object_id,
fc.referenced_column_id) AS ReferenceColumnName,
delete_referential_action_desc as DeleteRule
FROM sys.foreign_keys AS f
INNER JOIN sys.foreign_key_columnsAS fc
ON f.OBJECT_ID= fc.constraint_object_id
DECLARE @TableOwnervarchar(512)
DECLARE @TableNamevarchar(512)
DECLARE @ForeignKeyvarchar(512)
DECLARE @ColumnNamevarchar(512)
DECLARE @ReferenceTableNamevarchar(512)
DECLARE @ReferenceColumnNamevarchar(512)
DECLARE @DeleteRulevarchar(512)
PRINT('Loop through all tables and switch all constraints to have a delete rule of CASCADE')
DECLARE DataBaseTables0
CURSOR FOR
SELECT SCHEMA_NAME(t.schema_id) AS schema_name, t.name AS table_name
FROM sys.tables AS t;
OPEN DataBaseTables0;
FETCH NEXT FROM DataBaseTables0
INTO @TableOwner,@TableName;
WHILE @@FETCH_STATUS = 0
BEGIN
IF (NOT EXISTS(SELECT TOP1 1 FROM @IgnoreTables WHERE TableName = @TableName))
BEGIN
PRINT '['+@TableOwner+'].['+ @TableName + ']';
DECLARE DataBaseTableRelationships CURSOR FOR
SELECT ForeignKey, ColumnName, ReferenceTableName, ReferenceColumnName
FROM @AllRelationships
WHERE TableName = @TableName
OPEN DataBaseTableRelationships;
FETCH NEXTFROM DataBaseTableRelationships INTO @ForeignKey, @ColumnName, @ReferenceTableName, @ReferenceColumnName;
IF @@FETCH_STATUS <> 0
PRINT '=====> No Relationships' ;
WHILE @@FETCH_STATUS = 0
BEGIN
PRINT '=====> switching delete rule on' + @ForeignKey + ' to CASCADE';
BEGIN TRANSACTION
BEGIN TRY
EXEC('
ALTER TABLE ['+@TableOwner+'].['+ @TableName + ']
DROP CONSTRAINT '+@ForeignKey+';
ALTER TABLE ['+@TableOwner+'].['+ @TableName + '] ADD CONSTRAINT
'+@ForeignKey+' FOREIGN KEY
(
'+@ColumnName+'
) REFERENCES '+@ReferenceTableName+'
(
'+@ReferenceColumnName+'
) ON DELETE CASCADE;
');
COMMIT TRANSACTION
END TRY
BEGIN CATCH
PRINT '=====> can''t switch' + @ForeignKey + ' to CASCADE, - '+
CAST(ERROR_NUMBER() AS VARCHAR) +' - '+ ERROR_MESSAGE();
ROLLBACK TRANSACTION
END CATCH;
FETCH NEXTFROM DataBaseTableRelationships INTO @ForeignKey, @ColumnName, @ReferenceTableName, @ReferenceColumnName;
END;
CLOSE DataBaseTableRelationships;
DEALLOCATE DataBaseTableRelationships;
END
PRINT '';
PRINT '';
FETCH NEXTFROM DataBaseTables0
INTO @TableOwner,@TableName;
END
CLOSE DataBaseTables0;
DEALLOCATE DataBaseTables0;
PRINT('Loop though each table and DELETE All data from the table')
DECLARE DataBaseTables1 CURSOR FOR
SELECT SCHEMA_NAME(t.schema_id) AS schema_name, t.name AS table_name
FROM sys.tables AS t;
OPEN DataBaseTables1;
FETCH NEXT FROM DataBaseTables1
INTO @TableOwner,@TableName;
WHILE @@FETCH_STATUS = 0
BEGIN
IF (NOT EXISTS(SELECT TOP1 1 FROM @IgnoreTables WHERE TableName = @TableName))
BEGIN
PRINT '['+@TableOwner+'].['+ @TableName + ']';
PRINT '=====> deleting data from ['+@TableOwner+'].['+ @TableName + ']';
BEGIN TRY
EXEC('
DELETE FROM ['+@TableOwner+'].['+ @TableName + ']
DBCC CHECKIDENT ([' + @TableName + '], RESEED, 0)
');
END TRY
BEGIN CATCH
PRINT '=====> can''t FROM ['+@TableOwner+'].['+ @TableName + '], - ' +
CAST(ERROR_NUMBER() AS VARCHAR) +' - '+ ERROR_MESSAGE();
END CATCH;
END
PRINT '';
PRINT '';
FETCH NEXT FROM DataBaseTables1
INTO @TableOwner,@TableName;
END
CLOSE DataBaseTables1;
DEALLOCATE DataBaseTables1;
PRINT('Loop through all tables and switch all constraints to have a delete rule they had at the beggining of the task')
DECLARE DataBaseTables2 CURSOR FOR
SELECT SCHEMA_NAME(t.schema_id) AS schema_name, t.name AS table_name
FROM sys.tables AS t;
OPEN DataBaseTables2;
FETCH NEXT FROM DataBaseTables2
INTO @TableOwner,@TableName;
WHILE @@FETCH_STATUS = 0
BEGIN
IF (NOT EXISTS(SELECT TOP1 1 FROM @IgnoreTables WHERE TableName = @TableName))
BEGIN
PRINT '['+@TableOwner+'].['+ @TableName + ']';
DECLARE DataBaseTableRelationships CURSOR FOR
SELECT ForeignKey, ColumnName, ReferenceTableName, ReferenceColumnName, DeleteRule
FROM @AllRelationships
WHERE TableName = @TableName
OPEN DataBaseTableRelationships;
FETCH NEXT FROM DataBaseTableRelationships INTO @ForeignKey, @ColumnName, @ReferenceTableName, @ReferenceColumnName,@DeleteRule;
IF @@FETCH_STATUS <> 0
PRINT '=====> No Relationships' ;
WHILE @@FETCH_STATUS = 0
BEGIN
DECLARE @switchBackTovarchar(50) =
CASE
WHEN @DeleteRule= 'NO_ACTION'THEN 'NO ACTION'
WHEN @DeleteRule= 'CASCADE'THEN 'CASCADE'
WHEN @DeleteRule= 'SET_NULL'THEN 'SET NULL'
WHEN @DeleteRule= 'SET_DEFAULT'THEN 'SET DEFAULT'
END
PRINT '=====> switching delete rule on' + @ForeignKey + ' to ' + @switchBackTo;
BEGIN TRANSACTION
BEGIN TRY
EXEC('
ALTER TABLE ['+@TableOwner+'].['+ @TableName + ']
DROP CONSTRAINT '+@ForeignKey+';
ALTER TABLE ['+@TableOwner+'].['+ @TableName + '] ADD CONSTRAINT
'+@ForeignKey+' FOREIGN KEY
(
'+@ColumnName+'
) REFERENCES '+@ReferenceTableName+'
(
'+@ReferenceColumnName+'
) ON DELETE '+@switchBackTo+'
');
COMMIT TRANSACTION
END TRY
BEGIN CATCH
PRINT '=====> can''t change'+@ForeignKey+ ' back to'+ @switchBackTo +', -' +
CAST(ERROR_NUMBER() AS VARCHAR) +' - '+ ERROR_MESSAGE();
ROLLBACK TRANSACTION
END CATCH;
FETCH NEXTFROM DataBaseTableRelationships
INTO @ForeignKey,@ColumnName, @ReferenceTableName,@ReferenceColumnName, @DeleteRule;
END;
CLOSE DataBaseTableRelationships;
DEALLOCATE DataBaseTableRelationships;
END
PRINT '';
PRINT '';
FETCH NEXT FROM DataBaseTables2
INTO @TableOwner,@TableName;
END
CLOSE DataBaseTables2;
SET NOCOUNT ON
--Tables to ignore
DECLARE @IgnoreTables
TABLE (TableName varchar(512))
INSERT INTO @IgnoreTables (TableName) VALUES ('sysdiagrams')
DECLARE @AllRelationships
TABLE (ForeignKey varchar(512)
,TableName varchar(512)
,ColumnName varchar(512)
,ReferenceTableName varchar(512)
,ReferenceColumnName varchar(512)
,DeleteRule varchar(512))
INSERT INTO @AllRelationships
SELECT f.name AS ForeignKey,
OBJECT_NAME(f.parent_object_id) AS TableName,
COL_NAME(fc.parent_object_id,
fc.parent_column_id) AS ColumnName,
OBJECT_NAME (f.referenced_object_id) AS ReferenceTableName,
COL_NAME(fc.referenced_object_id,
fc.referenced_column_id) AS ReferenceColumnName,
delete_referential_action_desc as DeleteRule
FROM sys.foreign_keys AS f
INNER JOIN sys.foreign_key_columnsAS fc
ON f.OBJECT_ID= fc.constraint_object_id
DECLARE @TableOwnervarchar(512)
DECLARE @TableNamevarchar(512)
DECLARE @ForeignKeyvarchar(512)
DECLARE @ColumnNamevarchar(512)
DECLARE @ReferenceTableNamevarchar(512)
DECLARE @ReferenceColumnNamevarchar(512)
DECLARE @DeleteRulevarchar(512)
PRINT('Loop through all tables and switch all constraints to have a delete rule of CASCADE')
DECLARE DataBaseTables0
CURSOR FOR
SELECT SCHEMA_NAME(t.schema_id) AS schema_name, t.name AS table_name
FROM sys.tables AS t;
OPEN DataBaseTables0;
FETCH NEXT FROM DataBaseTables0
INTO @TableOwner,@TableName;
WHILE @@FETCH_STATUS = 0
BEGIN
IF (NOT EXISTS(SELECT TOP1 1 FROM @IgnoreTables WHERE TableName = @TableName))
BEGIN
PRINT '['+@TableOwner+'].['+ @TableName + ']';
DECLARE DataBaseTableRelationships CURSOR FOR
SELECT ForeignKey, ColumnName, ReferenceTableName, ReferenceColumnName
FROM @AllRelationships
WHERE TableName = @TableName
OPEN DataBaseTableRelationships;
FETCH NEXTFROM DataBaseTableRelationships INTO @ForeignKey, @ColumnName, @ReferenceTableName, @ReferenceColumnName;
IF @@FETCH_STATUS <> 0
PRINT '=====> No Relationships' ;
WHILE @@FETCH_STATUS = 0
BEGIN
PRINT '=====> switching delete rule on' + @ForeignKey + ' to CASCADE';
BEGIN TRANSACTION
BEGIN TRY
EXEC('
ALTER TABLE ['+@TableOwner+'].['+ @TableName + ']
DROP CONSTRAINT '+@ForeignKey+';
ALTER TABLE ['+@TableOwner+'].['+ @TableName + '] ADD CONSTRAINT
'+@ForeignKey+' FOREIGN KEY
(
'+@ColumnName+'
) REFERENCES '+@ReferenceTableName+'
(
'+@ReferenceColumnName+'
) ON DELETE CASCADE;
');
COMMIT TRANSACTION
END TRY
BEGIN CATCH
PRINT '=====> can''t switch' + @ForeignKey + ' to CASCADE, - '+
CAST(ERROR_NUMBER() AS VARCHAR) +' - '+ ERROR_MESSAGE();
ROLLBACK TRANSACTION
END CATCH;
FETCH NEXTFROM DataBaseTableRelationships INTO @ForeignKey, @ColumnName, @ReferenceTableName, @ReferenceColumnName;
END;
CLOSE DataBaseTableRelationships;
DEALLOCATE DataBaseTableRelationships;
END
PRINT '';
PRINT '';
FETCH NEXTFROM DataBaseTables0
INTO @TableOwner,@TableName;
END
CLOSE DataBaseTables0;
DEALLOCATE DataBaseTables0;
PRINT('Loop though each table and DELETE All data from the table')
DECLARE DataBaseTables1 CURSOR FOR
SELECT SCHEMA_NAME(t.schema_id) AS schema_name, t.name AS table_name
FROM sys.tables AS t;
OPEN DataBaseTables1;
FETCH NEXT FROM DataBaseTables1
INTO @TableOwner,@TableName;
WHILE @@FETCH_STATUS = 0
BEGIN
IF (NOT EXISTS(SELECT TOP1 1 FROM @IgnoreTables WHERE TableName = @TableName))
BEGIN
PRINT '['+@TableOwner+'].['+ @TableName + ']';
PRINT '=====> deleting data from ['+@TableOwner+'].['+ @TableName + ']';
BEGIN TRY
EXEC('
DELETE FROM ['+@TableOwner+'].['+ @TableName + ']
DBCC CHECKIDENT ([' + @TableName + '], RESEED, 0)
');
END TRY
BEGIN CATCH
PRINT '=====> can''t FROM ['+@TableOwner+'].['+ @TableName + '], - ' +
CAST(ERROR_NUMBER() AS VARCHAR) +' - '+ ERROR_MESSAGE();
END CATCH;
END
PRINT '';
PRINT '';
FETCH NEXT FROM DataBaseTables1
INTO @TableOwner,@TableName;
END
CLOSE DataBaseTables1;
DEALLOCATE DataBaseTables1;
PRINT('Loop through all tables and switch all constraints to have a delete rule they had at the beggining of the task')
DECLARE DataBaseTables2 CURSOR FOR
SELECT SCHEMA_NAME(t.schema_id) AS schema_name, t.name AS table_name
FROM sys.tables AS t;
OPEN DataBaseTables2;
FETCH NEXT FROM DataBaseTables2
INTO @TableOwner,@TableName;
WHILE @@FETCH_STATUS = 0
BEGIN
IF (NOT EXISTS(SELECT TOP1 1 FROM @IgnoreTables WHERE TableName = @TableName))
BEGIN
PRINT '['+@TableOwner+'].['+ @TableName + ']';
DECLARE DataBaseTableRelationships CURSOR FOR
SELECT ForeignKey, ColumnName, ReferenceTableName, ReferenceColumnName, DeleteRule
FROM @AllRelationships
WHERE TableName = @TableName
OPEN DataBaseTableRelationships;
FETCH NEXT FROM DataBaseTableRelationships INTO @ForeignKey, @ColumnName, @ReferenceTableName, @ReferenceColumnName,@DeleteRule;
IF @@FETCH_STATUS <> 0
PRINT '=====> No Relationships' ;
WHILE @@FETCH_STATUS = 0
BEGIN
DECLARE @switchBackTovarchar(50) =
CASE
WHEN @DeleteRule= 'NO_ACTION'THEN 'NO ACTION'
WHEN @DeleteRule= 'CASCADE'THEN 'CASCADE'
WHEN @DeleteRule= 'SET_NULL'THEN 'SET NULL'
WHEN @DeleteRule= 'SET_DEFAULT'THEN 'SET DEFAULT'
END
PRINT '=====> switching delete rule on' + @ForeignKey + ' to ' + @switchBackTo;
BEGIN TRANSACTION
BEGIN TRY
EXEC('
ALTER TABLE ['+@TableOwner+'].['+ @TableName + ']
DROP CONSTRAINT '+@ForeignKey+';
ALTER TABLE ['+@TableOwner+'].['+ @TableName + '] ADD CONSTRAINT
'+@ForeignKey+' FOREIGN KEY
(
'+@ColumnName+'
) REFERENCES '+@ReferenceTableName+'
(
'+@ReferenceColumnName+'
) ON DELETE '+@switchBackTo+'
');
COMMIT TRANSACTION
END TRY
BEGIN CATCH
PRINT '=====> can''t change'+@ForeignKey+ ' back to'+ @switchBackTo +', -' +
CAST(ERROR_NUMBER() AS VARCHAR) +' - '+ ERROR_MESSAGE();
ROLLBACK TRANSACTION
END CATCH;
FETCH NEXTFROM DataBaseTableRelationships
INTO @ForeignKey,@ColumnName, @ReferenceTableName,@ReferenceColumnName, @DeleteRule;
END;
CLOSE DataBaseTableRelationships;
DEALLOCATE DataBaseTableRelationships;
END
PRINT '';
PRINT '';
FETCH NEXT FROM DataBaseTables2
INTO @TableOwner,@TableName;
END
CLOSE DataBaseTables2;
DEALLOCATE DataBaseTables2;
© 2011 EricHu
原创作品,转贴请注明作者和出处,留此信息。
------------------------------------------------
cnBlobs:http://www.cnblogs.com/huyong/
CSDN:http://blog.csdn.net/chinahuyong
作者:EricHu(DB、C\S、B\S、WebService、WCF、PM等)
出处:http://www.cnblogs.com/huyong/
Q Q:80368704 E-Mail: 80368704@qq.com
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