SQL Server 数据迁移
2021-04-25

清空数据库

以下代码来自 Stackoverflow:

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

SELECT @name = (SELECT TOP 1 [name] FROM sysobjects WHERE [type] = 'P' AND category = 0 ORDER BY [name]) 
SELECT @schema = (SELECT TOP 1 schema_name(schema_id) FROM sys.procedures WHERE [name] = @name)

WHILE @name is not null 
BEGIN 
    SELECT @SQL = 'DROP PROCEDURE [' + @schema + '].[' + RTRIM(@name) +']' 
    --PRINT (@SQL)
    EXEC (@SQL) 
    PRINT 'Dropped Procedure: ' + @name 

    SELECT @name = (SELECT TOP 1 [name] FROM sysobjects WHERE [type] = 'P' AND category = 0 ORDER BY [name])
    SELECT @schema = (SELECT TOP 1 schema_name(schema_id) FROM sys.procedures WHERE [name] = @name) 
END 
GO 

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

SELECT @name = (SELECT TOP 1 T.name FROM sys.triggers AS T WHERE T.parent_id = 0 /* database trigger */ ORDER BY [name])

WHILE @name is not null 
BEGIN 
    SELECT @SQL = 'DROP TRIGGER [' + RTRIM(@name) +'] ON DATABASE' 
    EXEC (@SQL) 
    PRINT 'Dropped TRIGGER: ' + @name 

    SELECT @name = (SELECT TOP 1 T.name FROM sys.triggers AS T WHERE T.parent_id = 0 /* database trigger */ AND [name] > @name ORDER BY [name])
END 
GO 

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

SELECT @name = (SELECT TOP 1 [name] FROM sysobjects WHERE [type] = 'V' AND category = 0 ORDER BY [name]) 
SELECT @schema = (SELECT TOP 1 schema_name(schema_id) FROM sys.views WHERE [name] = @name)

WHILE @name IS NOT NULL 
BEGIN 
    SELECT @SQL = 'DROP VIEW [' + @schema + '].[' + 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]) 
    SELECT @schema = (SELECT TOP 1 schema_name(schema_id) FROM sys.views WHERE [name] = @name)
END 
GO 

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

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) 
SELECT @schema = (SELECT TOP 1 CONSTRAINT_SCHEMA 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 AND CONSTRAINT_SCHEMA = @schema ORDER BY CONSTRAINT_NAME) 
    WHILE @constraint IS NOT NULL 
    BEGIN 
        SELECT @SQL = 'ALTER TABLE [' + @schema + '].[' + RTRIM(@name) +'] DROP CONSTRAINT [' + RTRIM(@constraint) +']' 
        BEGIN TRY
            EXEC (@SQL)
            PRINT 'Dropped FK Constraint: ' + @constraint + ' on ' + @name
        END TRY
        BEGIN CATCH
            PRINT (@SQL)
        END CATCH
        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 AND CONSTRAINT_SCHEMA = @schema 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) 
SELECT @schema = (SELECT TOP 1 CONSTRAINT_SCHEMA 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) 
DECLARE @schema VARCHAR(128)

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) 
SELECT @schema = (SELECT TOP 1 CONSTRAINT_SCHEMA 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 AND CONSTRAINT_SCHEMA = @schema ORDER BY CONSTRAINT_NAME) 
    WHILE @constraint is not null 
    BEGIN 
        SELECT @SQL = 'ALTER TABLE [' + @schema + '].[' + RTRIM(@name) +'] DROP CONSTRAINT [' + RTRIM(@constraint)+']' 
        --PRINT @SQL
        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 AND CONSTRAINT_SCHEMA = @schema 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) 
SELECT @schema = (SELECT TOP 1 CONSTRAINT_SCHEMA 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) 
DECLARE @schema VARCHAR(128)

SELECT @name = (SELECT TOP 1 [name] FROM sysobjects WHERE [type] = 'U' AND category = 0 ORDER BY [name]) 
SELECT @schema = (SELECT TOP 1 schema_name(schema_id) FROM sys.tables WHERE [name] = @name)

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

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

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]) 
SELECT @schema = (SELECT TOP 1 schema_name(schema_id) FROM sys.objects WHERE [name] = @name)

WHILE @name IS NOT NULL 
BEGIN 
    SELECT @SQL = 'DROP FUNCTION [' + @schema + '].[' + 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]) 
    SELECT @schema = (SELECT TOP 1 schema_name(schema_id) FROM sys.objects WHERE [name] = @name)
END 
GO 

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

SELECT @name = (SELECT TOP 1 [name] FROM sys.types WHERE is_user_defined = 1 ORDER BY [name]) 
SELECT @schema = (SELECT TOP 1 schema_name(schema_id) FROM sys.types WHERE [name] = @name)

WHILE @name IS NOT NULL 
BEGIN 
    SELECT @SQL = 'DROP TYPE [' + @schema + '].[' + RTRIM(@name) +']' 
    EXEC (@SQL) 
    PRINT 'Dropped type: ' + @name 
    SELECT @name = (SELECT TOP 1 [name] FROM sys.types WHERE is_user_defined = 1 AND [name] > @name ORDER BY [name]) 
    SELECT @schema = (SELECT TOP 1 schema_name(schema_id) FROM sys.types WHERE [name] = @name)
END 
GO

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参考链接

本文链接：
content_copy https://zxs66.github.io/2021/04/25/SQL-Server-data-migration/