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原文:将表里的数据批量生成INSERT语句的存储过程 增强版有时候，我们需要将某个表里的数据全部或者根据查询条件导出来，迁移到另一个相同结构的库中
目前SQL Server里面是没有相关的工具根据查询条件来生成INSERT语句的，只有借助第三方工具（third party tools）
这种脚本网上也有很多，但是网上的脚本还是欠缺一些规范和功能，例如：我只想导出特定查询条件的数据，网上的脚本都是导出全表数据
如果表很大，对性能会有很大影响
这里有一个存储过程（适用于SQLServer2005 或以上版本）
-- Author: <桦仔> -- Blog: <http://www.cnblogs.com/lyhabc/> -- Create date: <2014/10/18> -- Description: <根据查询条件导出表数据的insert脚本> -- ============================================= CREATE PROCEDURE InsertGenerator ( @tableName NVARCHAR(MAX), @whereClause NVARCHAR(MAX) ) AS --Then it includes a cursor to fetch column specific information (column name and the data type thereof) --from information_schema.columns pseudo entity and loop through for building the INSERT and VALUES clauses --of an INSERT DML statement. DECLARE @string NVARCHAR(MAX) --for storing the first half of INSERT statement DECLARE @stringData NVARCHAR(MAX) --for storing the data (VALUES) related statement DECLARE @dataType NVARCHAR(MAX) --data types returned for respective columns DECLARE @schemaName NVARCHAR(MAX) --schema name returned from sys.schemas DECLARE @schemaNameCount int--shema count DECLARE @QueryString NVARCHAR(MAX) -- provide for the whole query, set @QueryString=‘ ‘ --如果有多个schema，选择其中一个schema SELECT @schemaNameCount=COUNT(*) FROM sys.tables t INNER JOIN sys.schemas s ON t.schema_id = s.schema_id WHERE t.name = @tableName WHILE(@schemaNameCount>0) BEGIN --如果有多个schema，依次指定 select @schemaName = name from ( SELECT ROW_NUMBER() over(order by s.schema_id) RowID,s.name FROM sys.tables t INNER JOIN sys.schemas s ON t.schema_id = s.schema_id WHERE t.name = @tableName ) as v where RowID=@schemaNameCount --Declare a cursor to retrieve column specific information --for the specified table DECLARE cursCol CURSOR FAST_FORWARD FOR SELECT column_name , data_type FROM information_schema.columns WHERE table_name = @tableName AND table_schema = @schemaName OPEN cursCol SET @string = ‘INSERT INTO [‘ + @schemaName + ‘].[‘ + @tableName + ‘](‘ SET @stringData = ‘‘ DECLARE @colName NVARCHAR(500) FETCH NEXT FROM cursCol INTO @colName, @dataType PRINT @schemaName PRINT @colName IF @@fetch_status <> 0 BEGIN PRINT ‘Table ‘ + @tableName + ‘ not found, processing skipped.‘ CLOSE curscol DEALLOCATE curscol RETURN END WHILE @@FETCH_STATUS = 0 BEGIN IF @dataType IN ( ‘varchar‘, ‘char‘, ‘nchar‘, ‘nvarchar‘ ) BEGIN SET @stringData = @stringData + ‘‘‘‘‘‘‘‘‘+ isnull(‘ + @colName + ‘,‘‘‘‘)+‘‘‘‘‘‘,‘‘+‘ END ELSE IF @dataType IN ( ‘text‘, ‘ntext‘ ) --if the datatype --is text or something else BEGIN SET @stringData = @stringData + ‘‘‘‘‘‘‘‘‘+ isnull(cast(‘ + @colName + ‘ as nvarchar(max)),‘‘‘‘)+‘‘‘‘‘‘,‘‘+‘ END ELSE IF @dataType = ‘money‘ --because money doesn‘t get converted --from varchar implicitly BEGIN SET @stringData = @stringData + ‘‘‘convert(money,‘‘‘‘‘‘+ isnull(cast(‘ + @colName + ‘ as nvarchar(max)),‘‘0.0000‘‘)+‘‘‘‘‘‘),‘‘+‘ END ELSE IF @dataType = ‘datetime‘ BEGIN SET @stringData = @stringData + ‘‘‘convert(datetime,‘‘‘‘‘‘+ isnull(cast(‘ + @colName + ‘ as nvarchar(max)),‘‘0‘‘)+‘‘‘‘‘‘),‘‘+‘ END ELSE IF @dataType = ‘image‘ BEGIN SET @stringData = @stringData + ‘‘‘‘‘‘‘‘‘+ isnull(cast(convert(varbinary,‘ + @colName + ‘) as varchar(6)),‘‘0‘‘)+‘‘‘‘‘‘,‘‘+‘ END ELSE --presuming the data type is int,bit,numeric,decimal BEGIN SET @stringData = @stringData + ‘‘‘‘‘‘‘‘‘+ isnull(cast(‘ + @colName + ‘ as nvarchar(max)),‘‘0‘‘)+‘‘‘‘‘‘,‘‘+‘ END SET @string = @string + ‘[‘ + @colName + ‘]‘ + ‘,‘ FETCH NEXT FROM cursCol INTO @colName, @dataType END --After both of the clauses are built, the VALUES clause contains a trailing comma which needs to be replaced with a single quote. The prefixed clause will only face removal of the trailing comma. DECLARE @Query NVARCHAR(MAX) -- provide for the whole query, -- you may increase the size PRINT @whereClause IF ( @whereClause IS NOT NULL AND @whereClause <> ‘‘ ) BEGIN SET @query = ‘SELECT ‘‘‘ + SUBSTRING(@string, 0, LEN(@string)) + ‘) VALUES(‘‘+ ‘ + SUBSTRING(@stringData, 0, LEN(@stringData) - 2) + ‘‘‘+‘‘)‘‘ FROM ‘ +@schemaName+‘.‘+ @tableName + ‘ WHERE ‘ + @whereClause PRINT @query -- EXEC sp_executesql @query --load and run the built query --Eventually, close and de-allocate the cursor created for columns information. END ELSE BEGIN SET @query = ‘SELECT ‘‘‘ + SUBSTRING(@string, 0, LEN(@string)) + ‘) VALUES(‘‘+ ‘ + SUBSTRING(@stringData, 0, LEN(@stringData) - 2) + ‘‘‘+‘‘)‘‘ FROM ‘ + @schemaName+‘.‘+ @tableName END CLOSE cursCol DEALLOCATE cursCol SET @schemaNameCount=@schemaNameCount-1 IF(@schemaNameCount=0) BEGIN SET @QueryString=@QueryString+@query END ELSE BEGIN SET @QueryString=@QueryString+@query+‘ UNION ALL ‘ END PRINT convert(varchar(max),@schemaNameCount)+‘---‘+@QueryString END EXEC sp_executesql @QueryString --load and run the built query --Eventually, close and de-allocate the cursor created for columns information.
这里要声明一下，如果你有多个schema，并且每个schema下面都有同一张表，那么脚本只会生成其中一个schema下面的表insert脚本
比如我现在有三个schema，下面都有customer这个表
CREATE TABLE dbo.[customer](city int,region int) CREATE SCHEMA test CREATE TABLE test.[customer](city int,region int) CREATE SCHEMA test1 CREATE TABLE test1.[customer](city int,region int)
在执行脚本的时候他只会生成dbo这个schema下面的表insert脚本
INSERT INTO [dbo].[customer]([city],[region]) VALUES(‘1‘,‘2‘)
这个脚本有一个缺陷
无论你的表的字段是什麽数据类型，导出来的时候只能是字符
表结构
CREATE TABLE [dbo].[customer](city int,region int)
导出来的insert脚本
INSERT INTO [dbo].[customer]([city],[region]) VALUES(‘1‘,‘2‘)
我这里演示一下怎麽用
有两种方式
1、导全表数据
InsertGenerator ‘customer‘, null
或
InsertGenerator ‘customer‘, ‘ ‘
2、根据查询条件导数据
InsertGenerator ‘customer‘, ‘city=3‘
或者
InsertGenerator ‘customer‘, ‘city=3 and region=8‘
点击一下，选择全部
然后复制
新建一个查询窗口，然后粘贴
其实SQLServer的技巧有很多
最后，大家可以看一下代码，非常简单，如果要支持SQLServer2000，只要改一下代码就可以了
补充：创建一张测试表
CREATE TABLE testinsert (id INT,name VARCHAR(100),cash MONEY,dtime DATETIME) INSERT INTO [dbo].[testinsert] ( [id], [name], [cash], [dtime] ) VALUES ( 1, -- id - int ‘nihao‘, -- name - varchar(100) 8.8, -- cash - money GETDATE() -- dtime - datetime ) SELECT * FROM [dbo].[testinsert]
测试
InsertGenerator ‘testinsert‘ ,‘‘ InsertGenerator ‘testinsert‘ ,‘name=‘‘nihao‘‘‘ InsertGenerator ‘testinsert‘ ,‘name=‘‘nihao‘‘ and cash=8.8‘
datetime类型会有一些问题
生成的结果会自动帮你转换
INSERT INTO [dbo].[testinsert]([id],[name],[cash],[dtime]) VALUES(‘1‘,‘nihao‘,convert(money,‘8.80‘),convert(datetime,‘02 8 2015 5:17PM‘))
如有不对的地方，欢迎大家拍砖o(∩_∩)o
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原文地址：http://www.cnblogs.com/lonelyxmas/p/4280881.html
