我们在数据库开发过程中， 常需要把一个表中的数据变成insert语句，便于完成
1，数据初始化
2，数据的导入/导出
下面的该存储过程（stored proc) usp_GenInsertScript,
用法如下：
exec usp_GenInsertScript 'your_table_name'
例如:
create table T1(idx int identity(1,1), userName nvarchar(50))
insert into T1(userName) values('ZhangZhiRong')
insert into T1(userName) values('HeHui')
insert into T1(userName) values('PengHaiPing')
exec usp_GenInsertScript 'T1'
执行该语句后会生成如下的脚本：
-- ====================================
SET IDENTITY_INSERT T1 ON
insert into T1([idx],[userName]) values(1,'ZhangZhiRong')
insert into T1([idx],[userName]) values(2,'HeHui')
insert into T1([idx],[userName]) values(3,'PengHaiPing')
SET IDENTITY_INSERT T1 OFF
-- ====================================
下面是创建该存储过程的脚本:
/**************************************************************
File : dbo.usp_GenInsertScript.PRC
Name : usp_GenInsertScript
Author : Inez Boone (inez.boone@xs4al.nl)
working on the Sybase version of & thanks to:
Reinoud van Leeuwen (reinoud@xs4all.nl)
Date : 2000-12-06
Description : This stored procedure generates an SQL script to fill the
tables in the database with their current content
Referencing :
Referenced By :
Parameter Input : 1) @tablename_mask varchar(30) = NULL
Parameter Output:
Return Value :
----------------------------------------------------------------
History
Author : Peter Lin
Date :
Description : only name change
Author : Peter Lin
Date : 2005-11-30
Description : change fieldname to [fieldname]
handle the situation where a column name is a keyword
----------------------------------------------------------------
Example
exec usp_GenInsertScript 'sec_allmodule'
****************************************************************/
create procedure usp_GenInsertScript
@tablename_mask varchar(30) = NULL
as
begin
-- NOTE: If, when executing in the Query Analyzer, the result is truncated, you can remedy
-- this by choosing Query / Current Connection Options, choosing the Advanced tab and
-- adjusting the value of 'Maximum characters per column'.
-- Unchecking 'Print headers' will get rid of the line of dashes.
declare @tablename varchar (128)
declare @tablename_max varchar (128)
declare @tableid int
declare @columncount numeric (7,0)
declare @columncount_max numeric (7,0)
declare @columnname varchar (30)
declare @columntype int
declare @string varchar (30)
declare @leftpart varchar (8000) /* 8000 is the longest string SQLSrv7 can EXECUTE */
declare @rightpart varchar (8000) /* without having to resort to concatenation */
declare @hasident int
set nocount on
-- take ALL tables when no mask is given (!)
if (@tablename_mask is NULL)
begin
select @tablename_mask = '%'
end
-- create table columninfo now, because it will be used several times
create table #columninfo
(num numeric (7,0) identity,
name varchar(30),
usertype smallint)
select name,
id
into #tablenames
from sysobjects
where type in ('U' ,'S')
and name like @tablename_mask
-- loop through the table #tablenames
select @tablename_max = MAX (name),
@tablename = MIN (name)
from #tablenames
while @tablename <= @tablename_max
begin
select @tableid = id
from #tablenames
where name = @tablename
if (@@rowcount <> 0)
begin
-- Find out whether the table contains an identity column
select @hasident = max( status & 0x80 )
from syscolumns
where id = @tableid
truncate table #columninfo
insert into #columninfo (name,usertype)
select name, type
from syscolumns C
where id = @tableid
and type <> 37 -- do not include timestamps
-- Fill @leftpart with the first part of the desired insert-statement, with the fieldnames
select @leftpart = 'select ''insert into '+@tablename
select @leftpart = @leftpart + '('
select @columncount = MIN (num),
@columncount_max = MAX (num)
from #columninfo
while @columncount <= @columncount_max
begin
select @columnname = name,
@columntype = usertype
from #columninfo
where num = @columncount
if (@@rowcount <> 0)
begin
if (@columncount < @columncount_max)
begin
select @leftpart = @leftpart + '[' + @columnname + '],'
end
else
begin
select @leftpart = @leftpart + '[' + @columnname + '])'
end
end
select @columncount = @columncount + 1
end
select @leftpart = @leftpart + ' values('''
-- Now fill @rightpart with the statement to retrieve the values of the fields, correctly formatted
select @columncount = MIN (num),
@columncount_max = MAX (num)
from #columninfo
select @rightpart = ''
while @columncount <= @columncount_max
begin
select @columnname = name,
@columntype = usertype
from #columninfo
where num = @columncount
if (@@rowcount <> 0)
begin
if @columntype in (39,47) /* char fields need quotes (except when entering NULL);
* use char(39) == ', easier readable than escaping
*/
begin
select @rightpart = @rightpart + '+'
select @rightpart = @rightpart + 'ISNULL(' + replicate( char(39), 4 ) + '+replace([' + @columnname + '],' + replicate( char(39), 4 ) + ',' + replicate( char(39), 6) + ')+' + replicate( char(39), 4 ) + ',''NULL'')'
end
else if @columntype = 35 /* TEXT fields cannot be RTRIM-ed and need quotes */
/* convert to VC 1000 to leave space for other fields */
begin
select @rightpart = @rightpart + '+'
select @rightpart = @rightpart + 'ISNULL(' + replicate( char(39), 4 ) + '+replace(convert(varchar(1000),[' + @columnname + '])' + ',' + replicate( char(39), 4 ) + ',' + replicate( char(39), 6 ) + ')+' + replicate( char(39), 4 ) + ',''NULL'')'
end
else if @columntype in (58,61,111) /* datetime fields */
begin
select @rightpart = @rightpart + '+'
select @rightpart = @rightpart + 'ISNULL(' + replicate( char(39), 4 ) + '+convert(varchar(20),[' + @columnname + '])+'+ replicate( char(39), 4 ) + ',''NULL'')'
end
else /* numeric types */
begin
select @rightpart = @rightpart + '+'
select @rightpart = @rightpart + 'ISNULL(convert(varchar(99),[' + @columnname + ']),''NULL'')'
end
if ( @columncount < @columncount_max)
begin
select @rightpart = @rightpart + '+'','''
end
end
select @columncount = @columncount + 1
end
end
select @rightpart = @rightpart + '+'')''' + ' from ' + @tablename
-- Order the select-statements by the first column so you have the same order for
-- different database (easy for comparisons between databases with different creation orders)
select @rightpart = @rightpart + ' order by 1'
-- For tables which contain an identity column we turn identity_insert on
-- so we get exactly the same content
if @hasident > 0
select 'SET IDENTITY_INSERT ' + @tablename + ' ON'
--print @leftpart + @rightpart
exec ( @leftpart + @rightpart )
if @hasident > 0
select 'SET IDENTITY_INSERT ' + @tablename + ' OFF'
select @tablename = MIN (name)
from #tablenames
where name > @tablename
end
end
GO
SET QUOTED_IDENTIFIER OFF
GO
SET ANSI_NULLS ON
GO
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