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  • 自动生成Insert数据的SQL脚本


    判断当表存在标识列的时候就要允许将显式值插入表的标识列中,设置:Set Identity_Insert TableName Off
    判断数据类型如,varchar,char,datetime,nvarchar,nchar,uniqueidentifier时候,在Insert字段中就要增加双引号,否则就不加;

    Use Test
    Go
    Declare 
            
    @Table1 nvarchar(128),
            
    @Table2 nvarchar(128),
            
    @Sql1 nvarchar(4000),
            
    @Sql2 nvarchar(4000),
            
    @SqlIdentityInsert nvarchar(512)

    Set @Table1='DutyHistory'    --源表
    Set @Table2='Duty'            --目标表

    IF Object_id(@Table1,'U'Is Null 
        
    Return
    If Isnull(@Table2,'')=''
        
    Set @Table2=@Table1

    Set @SqlIdentityInsert=''
    If Exists(Select 1 From sys.columns Where Object_id=Object_id(@Table1,'U'))
        
    Set @SqlIdentityInsert='Select ''Set Identity_Insert '+@Table2+' On '''

    Select 
        
    @Sql1=Isnull(@Sql1+',',' Insert Into '+@Table2+' (')+Quotename(name),
        
    @Sql2=Isnull(@Sql2+'+'',''+','Select @Sql1+'' Select ''')+'+Case When '+Quotename(name)+' Is null Then ''null'' Else '+
                
    Case When user_type_id In(175,61,239,231,58,98,36,167,241Then '''''''''+Rtrim('+Quotename(name)+')+''''''''' Else 'Rtrim('+Quotename(name)+')' End +' End'
    From sys.columns 
    Where Object_id=Object_id(@Table1,'U')

    Set @Sql1=@Sql1+')'
    Set @Sql2=    'Select Convert(nvarchar(max),''If Object_id('''''+@Table2+''''',''''U'''') Is Null Return;'') As SqlInsert  Union All '+
                
    @SqlIdentityInsert+' Union All '+
                
    @Sql2+' From '+Quotename(@Table1)+Case @SqlIdentityInsert When '' Then '' Else ' Union All ' End+
                
    Replace(@SqlIdentityInsert,' On ',' Off')

    Exec sp_executesql @Sql2,N'@Sql1 nvarchar(4000)',@Sql1

    Result:

    SqlInsert
    ---------------------------------------------------------
    If Object_id('Duty','U') Is Null Return;
    Set Identity_Insert Duty On
     Insert Into Duty ([id],[Name],[WorkDate],[WorkHours]) Select 1,'Robert','01  1 2008 12:00AM',3.4
     Insert Into Duty ([id],[Name],[WorkDate],[WorkHours]) Select 2,'Robert','01  2 2008 12:00AM',3.4
     Insert Into Duty ([id],[Name],[WorkDate],[WorkHours]) Select 3,'Robert','01  3 2008 12:00AM',3.4
    ... ...
     Insert Into Duty ([id],[Name],[WorkDate],[WorkHours]) Select 58,'Robert','02 27 2008 12:00AM',4.5
     Insert Into Duty ([id],[Name],[WorkDate],[WorkHours]) Select 59,'Robert','02 28 2008 12:00AM',4.5
     Insert Into Duty ([id],[Name],[WorkDate],[WorkHours]) Select 60,'Robert','02 29 2008 12:00AM',4.5
    Set Identity_Insert Duty Off

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  • 原文地址:https://www.cnblogs.com/wghao/p/1215953.html
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