sql教學 - sql update



刪除SQL Server數據庫中的所有數據 (6)

  1. 首先你必須禁用所有的觸發器:

    sp_msforeachtable 'ALTER TABLE ? DISABLE TRIGGER all';
    
  2. 運行這個腳本:(採取從這個post謝謝@SQLMenace)

    SET NOCOUNT ON
    GO
    
    SELECT 'USE [' + db_name() +']';
    ;WITH a AS 
    (
         SELECT 0 AS lvl, 
                t.object_id AS tblID 
         FROM sys.TABLES t
         WHERE t.is_ms_shipped = 0
           AND t.object_id NOT IN (SELECT f.referenced_object_id 
                                   FROM sys.foreign_keys f)
    
         UNION ALL
    
         SELECT a.lvl + 1 AS lvl, 
                f.referenced_object_id AS tblId
         FROM a
         INNER JOIN sys.foreign_keys f ON a.tblId = f.parent_object_id 
                                       AND a.tblID <> f.referenced_object_id
    )
    SELECT 
        'Delete from ['+ object_schema_name(tblID) + '].[' + object_name(tblId) + ']' 
    FROM a
    GROUP BY tblId 
    ORDER BY MAX(lvl),1
    

該腳本將按照正確的順序生成DELETE語句。 從引用的表開始,然後引用它們

  1. 複製DELETE FROM語句並運行一次

  2. 啟用觸發器

    sp_msforeachtable 'ALTER TABLE ? ENABLE TRIGGER all'
    
  3. 提交更改:

    begin transaction
    commit;
    

https://src-bin.com

我如何從我的數據庫的所有表中刪除所有記錄? 我可以用一個SQL命令來完成它,還是我需要為每個表創建一個SQL命令?


Answer #1

SQLMenace的解決方案為我工作,稍微調整了數據的刪除方式 - DELETE FROM而不是TRUNCATE

-- disable referential integrity
EXEC sp_MSForEachTable 'ALTER TABLE ? NOCHECK CONSTRAINT ALL' 
GO 

EXEC sp_MSForEachTable 'DELETE FROM ?' 
GO 

-- enable referential integrity again 
EXEC sp_MSForEachTable 'ALTER TABLE ? WITH CHECK CHECK CONSTRAINT ALL' 
GO

Answer #2

我知道這已經很晚了,但我同意AlexKuznetsov的建議來編寫數據庫腳本,而不是從表格中清除數據的麻煩。 如果TRUNCATE解決方案不起作用,並且您碰巧擁有大量數據,那麼發布(記錄)的DELETE語句可能需要很長時間,並且您將留下未被重新調用的標識符(即INSERT語句具有IDENTITY列的表格會為您提供50000的ID而不是1的ID)。

要腳本化整個數據庫,在SSMS中,右鍵單擊數據庫,然後選擇TASKS - > Generate scripts

單擊Next以跳過嚮導的開始屏幕,然後選擇要編寫腳本的對象:

在“ Set scripting options屏幕中,您可以為腳本選擇設置,例如是為所有對像生成1個腳本,還是為各個對象分別創建腳本,以及是以Unicode還是ANSI保存文件:

該嚮導將顯示摘要,您可以使用該摘要驗證所有內容是否符合要求,然後單擊“完成”關閉該摘要。


Answer #3

編寫數據庫中所有對象的腳本通常要快得多,並創建一個空的表單以刪除或截斷表格。


Answer #4
/* Drop all non-system stored procs */
DECLARE @name VARCHAR(128)
DECLARE @SQL VARCHAR(254)

SELECT @name = (SELECT TOP 1 [name] FROM sysobjects WHERE [type] = 'P' AND category = 0 ORDER BY [name])

WHILE @name is not null
BEGIN
    SELECT @SQL = 'DROP PROCEDURE [dbo].[' + RTRIM(@name) +']'
    EXEC (@SQL)
    PRINT 'Dropped Procedure: ' + @name
    SELECT @name = (SELECT TOP 1 [name] FROM sysobjects WHERE [type] = 'P' AND category = 0 AND [name] > @name ORDER BY [name])
END
GO

/* Drop all views */
DECLARE @name VARCHAR(128)
DECLARE @SQL VARCHAR(254)

SELECT @name = (SELECT TOP 1 [name] FROM sysobjects WHERE [type] = 'V' AND category = 0 ORDER BY [name])

WHILE @name IS NOT NULL
BEGIN
    SELECT @SQL = 'DROP VIEW [dbo].[' + RTRIM(@name) +']'
    EXEC (@SQL)
    PRINT 'Dropped View: ' + @name
    SELECT @name = (SELECT TOP 1 [name] FROM sysobjects WHERE [type] = 'V' AND category = 0 AND [name] > @name ORDER BY [name])
END
GO

/* Drop all functions */
DECLARE @name VARCHAR(128)
DECLARE @SQL VARCHAR(254)

SELECT @name = (SELECT TOP 1 [name] FROM sysobjects WHERE [type] IN (N'FN', N'IF', N'TF', N'FS', N'FT') AND category = 0 ORDER BY [name])

WHILE @name IS NOT NULL
BEGIN
    SELECT @SQL = 'DROP FUNCTION [dbo].[' + RTRIM(@name) +']'
    EXEC (@SQL)
    PRINT 'Dropped Function: ' + @name
    SELECT @name = (SELECT TOP 1 [name] FROM sysobjects WHERE [type] IN (N'FN', N'IF', N'TF', N'FS', N'FT') AND category = 0 AND [name] > @name ORDER BY [name])
END
GO

/* Drop all Foreign Key constraints */
DECLARE @name VARCHAR(128)
DECLARE @constraint VARCHAR(254)
DECLARE @SQL VARCHAR(254)

SELECT @name = (SELECT TOP 1 TABLE_NAME FROM INFORMATION_SCHEMA.TABLE_CONSTRAINTS WHERE constraint_catalog=DB_NAME() AND CONSTRAINT_TYPE = 'FOREIGN KEY' ORDER BY TABLE_NAME)

WHILE @name is not null
BEGIN
    SELECT @constraint = (SELECT TOP 1 CONSTRAINT_NAME FROM INFORMATION_SCHEMA.TABLE_CONSTRAINTS WHERE constraint_catalog=DB_NAME() AND CONSTRAINT_TYPE = 'FOREIGN KEY' AND TABLE_NAME = @name ORDER BY CONSTRAINT_NAME)
    WHILE @constraint IS NOT NULL
    BEGIN
        SELECT @SQL = 'ALTER TABLE [dbo].[' + RTRIM(@name) +'] DROP CONSTRAINT [' + RTRIM(@constraint) +']'
        EXEC (@SQL)
        PRINT 'Dropped FK Constraint: ' + @constraint + ' on ' + @name
        SELECT @constraint = (SELECT TOP 1 CONSTRAINT_NAME FROM INFORMATION_SCHEMA.TABLE_CONSTRAINTS WHERE constraint_catalog=DB_NAME() AND CONSTRAINT_TYPE = 'FOREIGN KEY' AND CONSTRAINT_NAME <> @constraint AND TABLE_NAME = @name ORDER BY CONSTRAINT_NAME)
    END
SELECT @name = (SELECT TOP 1 TABLE_NAME FROM INFORMATION_SCHEMA.TABLE_CONSTRAINTS WHERE constraint_catalog=DB_NAME() AND CONSTRAINT_TYPE = 'FOREIGN KEY' ORDER BY TABLE_NAME)
END
GO

/* Drop all Primary Key constraints */
DECLARE @name VARCHAR(128)
DECLARE @constraint VARCHAR(254)
DECLARE @SQL VARCHAR(254)

SELECT @name = (SELECT TOP 1 TABLE_NAME FROM INFORMATION_SCHEMA.TABLE_CONSTRAINTS WHERE constraint_catalog=DB_NAME() AND CONSTRAINT_TYPE = 'PRIMARY KEY' ORDER BY TABLE_NAME)

WHILE @name IS NOT NULL
BEGIN
    SELECT @constraint = (SELECT TOP 1 CONSTRAINT_NAME FROM INFORMATION_SCHEMA.TABLE_CONSTRAINTS WHERE constraint_catalog=DB_NAME() AND CONSTRAINT_TYPE = 'PRIMARY KEY' AND TABLE_NAME = @name ORDER BY CONSTRAINT_NAME)
    WHILE @constraint is not null
    BEGIN
        SELECT @SQL = 'ALTER TABLE [dbo].[' + RTRIM(@name) +'] DROP CONSTRAINT [' + RTRIM(@constraint)+']'
        EXEC (@SQL)
        PRINT 'Dropped PK Constraint: ' + @constraint + ' on ' + @name
        SELECT @constraint = (SELECT TOP 1 CONSTRAINT_NAME FROM INFORMATION_SCHEMA.TABLE_CONSTRAINTS WHERE constraint_catalog=DB_NAME() AND CONSTRAINT_TYPE = 'PRIMARY KEY' AND CONSTRAINT_NAME <> @constraint AND TABLE_NAME = @name ORDER BY CONSTRAINT_NAME)
    END
SELECT @name = (SELECT TOP 1 TABLE_NAME FROM INFORMATION_SCHEMA.TABLE_CONSTRAINTS WHERE constraint_catalog=DB_NAME() AND CONSTRAINT_TYPE = 'PRIMARY KEY' ORDER BY TABLE_NAME)
END
GO

/* Drop all tables */
DECLARE @name VARCHAR(128)
DECLARE @SQL VARCHAR(254)

SELECT @name = (SELECT TOP 1 [name] FROM sysobjects WHERE [type] = 'U' AND category = 0 ORDER BY [name])

WHILE @name IS NOT NULL
BEGIN
    SELECT @SQL = 'DROP TABLE [dbo].[' + RTRIM(@name) +']'
    EXEC (@SQL)
    PRINT 'Dropped Table: ' + @name
    SELECT @name = (SELECT TOP 1 [name] FROM sysobjects WHERE [type] = 'U' AND category = 0 AND [name] > @name ORDER BY [name])
END
GO

Answer #5
EXEC sp_MSForEachTable 'ALTER TABLE ? NOCHECK CONSTRAINT ALL'

EXEC sp_MSForEachTable 'ALTER TABLE ? DISABLE TRIGGER ALL'

EXEC sp_MSForEachTable 'DELETE FROM ?'

EXEC sp_MSForEachTable 'ALTER TABLE ? CHECK CONSTRAINT ALL'

EXEC sp_MSForEachTable 'ALTER TABLE ? ENABLE TRIGGER ALL'

EXEC sp_MSFOREACHTABLE 'SELECT * FROM ?'

GO




multi-table-delete