将表里的数据批量生成INSERT语句的存储过程

有时候，我们需要将某个表里的数据全部导出来，迁移到另一个相同结构的库中，这里可以采取一个简便的方法，通过一个存储过程批量导出数据并生成SQL语句，非常方便。存储过程如下：

CREATE   proc [dbo].[spGenInsertSQL] (@tablename varchar(256))
as
begin
declare @sql varchar(max)
declare @sqlValues varchar(max)
set @sql =' ('
set @sqlValues = 'values (''+'
select @sqlValues = @sqlValues + cols + ' + '','' + ' ,@sql = @sql + '[' + name + '],'
from
      (select case
                when xtype in (48,52,56,59,60,62,104,106,108,122,127)      

then 'case when '+ name +' is null then ''NULL'' else ' + 'cast('+ name + ' as varchar)'+' end'

when xtype in (58,61)

then 'case when '+ name +' is null then ''NULL'' else '+''''''''' + ' + 'cast('+ name +' as varchar)'+ '+'''''''''+' end'

when xtype in (167)

then 'case when '+ name +' is null then ''NULL'' else '+''''''''' + ' + 'replace('+ name+','''''''','''''''''''')' + '+'''''''''+' end'

when xtype in (231)

then 'case when '+ name +' is null then ''NULL'' else '+'''N'''''' + ' + 'replace('+ name+','''''''','''''''''''')' + '+'''''''''+' end'

when xtype in (175)

then 'case when '+ name +' is null then ''NULL'' else '+''''''''' + ' + 'cast(replace('+ name+','''''''','''''''''''') as Char(' + cast(length as varchar) + '))+'''''''''+' end'

when xtype in (239)

then 'case when '+ name +' is null then ''NULL'' else '+'''N'''''' + ' + 'cast(replace('+ name+','''''''','''''''''''') as Char(' + cast(length as varchar) + '))+'''''''''+' end'

else '''NULL'''

end as Cols,name

from syscolumns

where id = object_id(@tablename)

) T
set @sql ='select ''INSERT INTO ['+ @tablename + ']' + left(@sql,len(@sql)-1)+') ' + left(@sqlValues,len(@sqlValues)-4) + ')'' from '+@tablename
print @sql
exec (@sql)
end

GO