朋友在折腾导出数据库对象的创建脚本时,遇到一个问题,表结构相同,但不同服务器上导出的脚本却不相同:
一台服务器上的脚本如下:
SET ANSI_NULLS ONGOSET QUOTED_IDENTIFIER ONGOCREATE TABLE [dbo].[testb]( [id] [varchar](40) NOT NULL, [mobile] [varchar](11) NULL, [name] [varchar](20) NULL, [address_id] [int] NULL, [work] [varchar](100) NULL, CONSTRAINT [PK_testb] PRIMARY KEY CLUSTERED ( [id] ASC)WITH ( PAD_INDEX = OFF, STATISTICS_NORECOMPUTE = OFF, IGNORE_DUP_KEY = OFF, ALLOW_ROW_LOCKS = ON, ALLOW_PAGE_LOCKS = ON) ON [PRIMARY]) ON [PRIMARY]GO
另一台服务器上的脚本如下:
SET ANSI_NULLS ONGOSET QUOTED_IDENTIFIER ONGOSET ANSI_PADDING ONGOCREATE TABLE [dbo].[testb]( [id] [varchar](40) NOT NULL , [mobile] [varchar](11) NULL , [name] [varchar](20) NULL , [address_id] [int] NULL)ON[PRIMARY]SET ANSI_PADDING OFFALTER TABLE [dbo].[testb] ADD [work] [varchar](100) NULLCONSTRAINT [PK_testb] PRIMARY KEY CLUSTERED ([id] ASC)WITH ( PAD_INDEX = OFF, STATISTICS_NORECOMPUTE = OFF, IGNORE_DUP_KEY = OFF, ALLOW_ROW_LOCKS = ON, ALLOW_PAGE_LOCKS = ON) ON [PRIMARY]GOSET ANSI_PADDING OFFGO
为什么会这样呢?以前也发现过类似问题,一直认为这两种脚本运行结果都一样,因此没有深入思考。
对比前后代码,会发现除表创建脚本不同外,SET 选项也略有不同,后者有关于ANSI_PADDING的设置,哪究竟是不是这个选项导致的呢?
我们在SSMS工具中进行如下设置:
进入 SSMS>>工具>>选项 中,对SET ANSI_PADDING OFF 分别设置为TURE和FALSE,然后依次生成同一对象的脚本,会先后导出的脚本不同。
通过上面的选项,我们可以导出不同的对象创建脚本,节省很多人力,如
1>修改"编写索引脚本"为TRUE, 在生成表创建脚本时附带生成索引的创建脚本,
2>修改"检查是否存在对象"为TURE,可以生成带IF NOT EXISTS的检查脚本;
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当然,如果想自动化,PowerShell是最好的选择,下面是摘抄自网络的一段代码,供各位参考:
<#===========================================#>##生成创建表的脚本,包含Constraints,Indexes,Triggers##Link:http://www.cnblogs.com/wghao/archive/2011/11/04/2235220.html$serverInstance="." $userName="sa"$password="1234"$DataBase="Test_Sub"$SrciptOutputPath="D:\SC\"$TableList="TB_Lock","TB002"<#===========================================#>[System.Reflection.Assembly]::LoadWithPartialName("Microsoft.SqlServer.Smo") | Out-Null[System.Reflection.Assembly]::LoadWithPartialName("Microsoft.SqlServer.ConnectionInfo") | Out-Null$ServerConnection =new-object "Microsoft.SqlServer.Management.Common.ServerConnection" $serverInstance,$userName, $password Try{ $ServerConnection.Connect()}Catch{ Write-Error $_}if($ServerConnection.IsOpen){ #腳本选项设置 $ScriptingOptions = New-Object "Microsoft.SqlServer.Management.Smo.ScriptingOptions" $ScriptingOptions.DriAllKeys = $True $ScriptingOptions.DriClustered = $True $ScriptingOptions.DriAllConstraints = $True $ScriptingOptions.DriDefaults = $True $ScriptingOptions.DriIndexes = $True $ScriptingOptions.DriNonClustered = $True $ScriptingOptions.DriPrimaryKey = $True $ScriptingOptions.DriUniqueKeys = $True $ScriptingOptions.AnsiFile = $False $ScriptingOptions.ClusteredIndexes = $True $ScriptingOptions.IncludeHeaders = $False $ScriptingOptions.Indexes = $True $ScriptingOptions.SchemaQualify = $False $ScriptingOptions.Triggers = $True $ScriptingOptions.XmlIndexes = $True $ScriptingOptions.ExtendedProperties = $True $ScriptingOptions.NoFileGroup = $True $ScriptingOptions.NoCollation = $True $ScriptingOptions.IncludeIfNotExists = $True $ScriptingOptions.NoIdentities = $True #获得数据库中的用户表 $Tables=((New-Object "Microsoft.SqlServer.Management.Smo.Server" $ServerConnection).databases[$DataBase]).tables | Where-Object -FilterScript{$_.IsSystemObject -eq $False} if($Tables) { [System.Text.StringBuilder]$Sript="Use ["+$DataBase+"]`nGo`n" [int]$count=1 #刪除腳本 foreach($tb In $Tables | Sort-Object -Property CreateDate,ID -Descending) { $i=$Sript.AppendLine("If object_id('[" +$Tb.Name+ "]') Is Not null `n`t Drop Table ["+ $Tb.Name+ "]") } #创建脚本 foreach($tb In $Tables | Sort-Object -Property CreateDate,ID) { if($TableList -contains $tb.Name) { foreach($s In $tb.Script($ScriptingOptions)) { $i=$Sript.AppendLine($s) } Write-Host "處理完表 (" $count "/" $Tables.Count ")" ": " $tb.Name } $count+=1 } $i=$Sript.AppendLine("Go") Write-Host $Sript.ToString() #输出脚本 [string]$Path=$SrciptOutputPath+$DataBase+"-"+(Get-Date -format yyyyMMdd)+".sql" $Sript.ToString() | Out-File -FilePath $Path } Else { Write-Error "无效的数据库: $DataBase 。或在数据库中找不到对应的表!" }}
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