下面是获取表数据insert into脚本的存储过程,因为有些表数据是NULL值,在查询分析器中执行能显示NULL,但我在程序中将执行结果写入文本时NULL值就不显示了,就如这样的形式insert into table(id,name,sex) values(,,),这样我在将执行导入脚本时就会出现错误了!在文本中显示的形式我想要的是insert into table(id,name,sex) values(null,null,null)或者insert into table(id,name,sex) values('','','')。
这个存储过程只判断数据长度为0时才转换为'',麻烦高手帮我看看这存储过程怎么改才能在列数据为NULL时转换为'',我试了好几次都不行,或者说我在写入文本的时候应该怎么写才能让NULL值显示出来
CREATE PROCEDURE dbo.getdata
@tablename sysname
AS
declare @column varchar(1000)
declare @columndata varchar(1000)
declare @sql varchar(4000)
declare @xtype tinyint
declare @name sysname
declare @objectId int
declare @objectname sysname
declare @ident int set nocount on
set @objectId=object_id(@tablename) if @objectId is null
begin
print 'The object not exists'
return
end
set @objectname=rtrim(object_name(@objectId)) if @objectname is null or charindex(@objectname,@tablename)=0
begin
print 'object not in current database'
return
end if OBJECTPROPERTY(@objectId,'IsTable') < > 1
begin
print 'The object is not table'
return
end select @ident=status&0x80 from syscolumns where id=@objectid and status&0x80=0x80 if @ident is not null
print 'SET IDENTITY_INSERT '+@TableName+' ON' declare syscolumns_cursor cursorfor select c.name,c.xtype from syscolumns c where c.id=@objectid order by c.colid open syscolumns_cursor
set @column=''
set @columndata=''
fetch next from syscolumns_cursor into @name,@xtype while @@fetch_status < >-1
begin
if @@fetch_status < >-2
begin
if @xtype not in(189,34,35,99,98) --timestamp不需处理,image,text,ntext,sql_variant 暂时不处理 begin
set @column=@column+case when len(@column)=0 then'' else ','end+@name set @columndata=@columndata+case when len(@columndata)=0 then '' else ','','','
end +case when @xtype in(167,175) then '''''''''+'+@name+'+''''''''' --varchar,char
when @xtype in(231,239) then '''N''''''+'+@name+'+''''''''' --nvarchar,nchar
when @xtype=61 then '''''''''+convert(char(23),'+@name+',121)+''''''''' --datetime
when @xtype=58 then '''''''''+convert(char(16),'+@name+',120)+''''''''' --smalldatetime
when @xtype=36 then '''''''''+convert(char(36),'+@name+')+''''''''' --uniqueidentifier
else @name end
end
end
fetch next from syscolumns_cursor into @name,@xtype
end
close syscolumns_cursor
deallocate syscolumns_cursor
set @sql='set nocount on select ''insert into '+@tablename+'('+@column+') values(''as ''--'','+@columndata+','')'' from '+@tablename
print '--'+@sql
exec(@sql)
if @ident is not null
print 'SET IDENTITY_INSERT '+@TableName+' OFF'
这个存储过程只判断数据长度为0时才转换为'',麻烦高手帮我看看这存储过程怎么改才能在列数据为NULL时转换为'',我试了好几次都不行,或者说我在写入文本的时候应该怎么写才能让NULL值显示出来
CREATE PROCEDURE dbo.getdata
@tablename sysname
AS
declare @column varchar(1000)
declare @columndata varchar(1000)
declare @sql varchar(4000)
declare @xtype tinyint
declare @name sysname
declare @objectId int
declare @objectname sysname
declare @ident int set nocount on
set @objectId=object_id(@tablename) if @objectId is null
begin
print 'The object not exists'
return
end
set @objectname=rtrim(object_name(@objectId)) if @objectname is null or charindex(@objectname,@tablename)=0
begin
print 'object not in current database'
return
end if OBJECTPROPERTY(@objectId,'IsTable') < > 1
begin
print 'The object is not table'
return
end select @ident=status&0x80 from syscolumns where id=@objectid and status&0x80=0x80 if @ident is not null
print 'SET IDENTITY_INSERT '+@TableName+' ON' declare syscolumns_cursor cursorfor select c.name,c.xtype from syscolumns c where c.id=@objectid order by c.colid open syscolumns_cursor
set @column=''
set @columndata=''
fetch next from syscolumns_cursor into @name,@xtype while @@fetch_status < >-1
begin
if @@fetch_status < >-2
begin
if @xtype not in(189,34,35,99,98) --timestamp不需处理,image,text,ntext,sql_variant 暂时不处理 begin
set @column=@column+case when len(@column)=0 then'' else ','end+@name set @columndata=@columndata+case when len(@columndata)=0 then '' else ','','','
end +case when @xtype in(167,175) then '''''''''+'+@name+'+''''''''' --varchar,char
when @xtype in(231,239) then '''N''''''+'+@name+'+''''''''' --nvarchar,nchar
when @xtype=61 then '''''''''+convert(char(23),'+@name+',121)+''''''''' --datetime
when @xtype=58 then '''''''''+convert(char(16),'+@name+',120)+''''''''' --smalldatetime
when @xtype=36 then '''''''''+convert(char(36),'+@name+')+''''''''' --uniqueidentifier
else @name end
end
end
fetch next from syscolumns_cursor into @name,@xtype
end
close syscolumns_cursor
deallocate syscolumns_cursor
set @sql='set nocount on select ''insert into '+@tablename+'('+@column+') values(''as ''--'','+@columndata+','')'' from '+@tablename
print '--'+@sql
exec(@sql)
if @ident is not null
print 'SET IDENTITY_INSERT '+@TableName+' OFF'
update .... from (select isnull(column,'') from table)
@tablename sysname
AS
declare @column varchar(1000)
declare @columndata varchar(1000)
declare @sql varchar(4000)
declare @xtype tinyint
declare @name sysname
declare @objectId int
declare @objectname sysname
declare @ident int set nocount on
set @objectId=object_id(@tablename) if @objectId is null
begin
print 'The object not exists'
return
end
set @objectname=rtrim(object_name(@objectId)) if @objectname is null or charindex(@objectname,@tablename)=0
begin
print 'object not in current database'
return
end if OBJECTPROPERTY(@objectId,'IsTable') < > 1
begin
print 'The object is not table'
return
end select @ident=status&0x80 from syscolumns where id=@objectid and status&0x80=0x80 if @ident is not null
print 'SET IDENTITY_INSERT '+@TableName+' ON' declare syscolumns_cursor cursor for select c.name,c.xtype from syscolumns c where c.id=@objectid order by c.colid open syscolumns_cursor
set @column=''
set @columndata=''
fetch next from syscolumns_cursor into @name,@xtype while @@fetch_status < > -1
begin
if @@fetch_status < > -2
begin
if @xtype not in(189,34,35,99,98) --timestamp不需处理,image,text,ntext,sql_variant 暂时不处理
begin
set @column=@column+case when len(@column)=0 then'' else ','end+@name
set @columndata=@columndata+case when len(ISNULL(@columndata, ''))=0 then '' else ','','',' end
+case when @xtype in(167,175) then '''''''''+ISNULL('+@name+','''')+''''''''' --varchar,char
--when @xtype in(167,175) AND @Name IS NULL then '''''''''+''''''''+''''''''' --varchar,char
when @xtype in(231,239) then '''N''''''+ISNULL('+@name+','''')+''''''''' --nvarchar,nchar
when @xtype=61 then '''''''''+convert(char(23),'+@name+',121)+''''''''' --datetime
when @xtype=58 then '''''''''+convert(char(16),'+@name+',120)+''''''''' --smalldatetime
when @xtype=36 then '''''''''+convert(char(36),ISNULL('+@name+',''''))+''''''''' --uniqueidentifier
else @name end
end
end
fetch next from syscolumns_cursor into @name,@xtype
end
close syscolumns_cursor
deallocate syscolumns_cursor
set @sql='set nocount on select ''insert into '+@tablename+'('+@column+') values(''as ''--'','+@columndata+','')'' from '+@tablename
print '--'+@sql
exec(@sql)
if @ident is not null
print 'SET IDENTITY_INSERT '+@TableName+' OFF'