直接从SQL语句问题贴子数据建表并生成建表语句的存储过程

下面的存储过程，可帮你在回答SQL语句问题时，直接从贴子的样本数据建表并生成建表语句，省去大量的手工输入数据的工作。

/*Create Table from your web page data
* 2004-JAN-1, OpenVMS，V0.1
* 2004-JAN-2, V0.5, add tab & blank values logical
* 2004-JAN-3, V1.0, add SQL Statement generation
* 2004-JAN-4, V1.1, fix datatype like decimal(4,2) bug
* 2004-JAN-4, V1.2, fix field name bug
*
* Sample Call: in SQL Query Analyzer
exec dbo.create_table @###t2@#,@#varchar(20),datetime k@#,@#
ID                   AnDate            
99101                2002-11-24 00:00:00.000
99101                2003-11-15 00:00:00.000
99101                2003-11-29 00:00:00.000
99101                2003-12-20 00:00:00.000@#

注意：
1 如用临时表名，只能用全局临时表 ##，否则不可访问
2 如果没有列名，则需要在第一行数据手动加上列名
3 字段名称不允许含空格
4 至少一行数据，否则没有意义
5 字段值为空需要写上NULL，字段值中的任何符号作为值的一部分
6 没有对定义类型和值的类型匹配检查
7 可指定值中含有空格，方法为在该类型定义中的尾部加字母 k, 如 datatime k,
8 如过值中含有单引号，需要复写 @# －》@#@#
*/

IF EXISTS (SELECT name
    FROM   sysobjects
    WHERE  name = N@#create_table@#
    AND    type = @#P@#)
    DROP PROCEDURE create_table
go

create proc dbo.create_table
@table_name varchar(60),--- Table name
@datatype varchar(1000),--- separated by comma @#,@#
@str nvarchar(3000)     --- input string pasted from web page
AS
BEGIN
declare @dt table(id int identity(1,1),fld_name varchar(30),fld_type varchar(20),blank int)
declare @sqlt table(sql_statement varchar(8000))
declare @tmp varchar(1000),@num1 int,@num2 int,@sql nvarchar(4000)
declare @a nvarchar(3000),@i int,@j int,@k int,@m int,@x nvarchar(1000)

SET NOCOUNT ON
if object_id(@table_name) is not null
   begin
    set @a=@#TABLE @#+@table_name+@# exists,choose a new one!@#
    RAISERROR (@a,16,1)
    return
   end

--提取类型名
set @datatype=lower(replace(@datatype,@# @#,@#@#))
set @tmp=@datatype
set @i=1
set @num1=0

while @i>0
begin
 select @i=charindex(@#,@#,@datatype)
        --check datatype like decimal(10,4)
 if @i>charindex(@#(@#,@datatype) and @i<charindex(@#)@#,@datatype)
           set @i=charindex(@#)@#,@datatype)+1
 select @j=charindex(@#k@#,@datatype)
 set @m=0
 if (@j>1 and @j<@i) or (@i=0 and @j=len(@datatype)) set @m=-1
 if @i>1
 begin
    insert into @dt(fld_type,blank)
  values(left(@datatype,@i-1+@m),case when @m=-1 then 1 else 0 end)
    select @datatype=right(@datatype,len(@datatype)-@i)
 end
 if @i=0 and len(@datatype)>0
    insert into @dt(fld_type,blank) values(left(@datatype,len(@datatype)+@m),
   case when @m=-1 then 1 else 0 end)
 if @i=1 or len(@datatype)=0 
 begin
 RAISERROR (@#error data type,comma sign can not be a prefix or surfix@#,16,1)
 return
 end
 
 set @num1=@num1+1
end

--检查类型
if exists (select fld_type from @dt
   where (case when charindex(@#(@#,fld_type)>0 then
               left(fld_type,charindex(@#(@#,fld_type)-1)
               else fld_type end) not in (select name from systypes) or
          charindex(@#(@#,fld_type)*charindex(@#)@#,fld_type)=0 and
          charindex(@#(@#,fld_type)+charindex(@#)@#,fld_type)>0)
   begin
    RAISERROR (@#error data type.@#, 16, 1)
    return
   end

--提取字段和数据
set @a=replace(@str,char(9),@# @#) --- TAB char
set @a=rtrim(ltrim(@a))
if charindex(char(13)+char(10),right(@a,len(@a)-1))=0 or len(@a)=0
   begin
    RAISERROR (@#input data error,check your data.@#, 16, 1)
    return
   end

if object_id(@#tempdb.dbo.#xx@#) is not null drop table #xx
select identity(int,1,1) ID,space(50) val into #xx where 1=2
set @k=0
set @num2=0
set @m=0
while len(@a)>0
begin
 set @i=1
 set @x=left(@a,1)

 if @x=char(10) begin
    if @m>@num2 and @num2>0 and charindex(@#k@#,@datatype)=0 begin
              RAISERROR (@#number of data is greater than the columns,you should add k in data type difinition.@#, 16, 1)
              return
    end 
    set @m=0
 end

 if @x not in (@# @#,char(13),char(10))
 begin
          set @i=charindex(@# @#,@a)
          set @j=charindex(char(13)+char(10),@a)
   set @m=@m+1
   if @k<>-1 set @k=@k+1
   if @j>0 and (@j<@i or @j>@i and substring(@a,@i,@j-@i)=space(@j-@i)) begin
     set @i=@j
     if @k>@num2 and @k<>-1 set @num2=@k
     set @k=-1
   end
          if @i=0 set @i=(case when @j>0 then @j else len(@a)+1 end)

   select @j=max(ID) from #xx
   if @m=1 or @j<=@num1 or (select blank from @dt where ID=@m-1) <> 1
      begin
        if @j<@num1 set @x=@#[@#+replace(rtrim(left(@a,@i-1)),@#]@#,@#]]@#)+@#]@#
        else set @x=rtrim(left(replace(@a,@#@#@#@#,@#@#@#@#@#@#),@i-1)) 
               insert into #xx(val) values(@x)
      end
   else
     begin
       update #xx set val=val+@# @#+rtrim(left(@a,@i-1)) where ID=@j
       set @m=@m-1
     end
 end
 if @i<len(@a) set @a=ltrim(right(@a,len(@a)-@i))
 else set @a=@#@#
end

update #xx set val=@#@# where val=@#NULL@#
update #xx set val=@#@#@#@#+val+@#@#@#@# where ID>@num2

if @num1<>@num2
begin
RAISERROR (@#datatype dismatch the columns@#,16,1)
return
end

-- if use the exists template table,drop it
if object_id(@#tempdb.dbo.@#+@table_name) is not null
   exec(@#drop table @#+@table_name)

-- 建表
update a
set a.fld_name=b.val
from @dt a,#xx b
where a.ID=b.ID and a.ID<=@num1

set @a=@#@#
select @a=@a+fld_name+@# @#+fld_type+@#,@# from @dt where ID<=@num1
set @a=left(@a,len(@a)-1)
set @sql=@#create table @#+@table_name+@#(@#+@a+@#)@#
exec(@sql)
insert into @sqlt select @sql

--插入数据
set @i=@num1+1
while @i<=(select max(ID) from #xx)
begin
set @a=@#@#
set @sql=@#select @s=@s+val+@#@#,@#@#@#+@# from (select top @#+convert(varchar(10),@num1)
         +@# val from #xx where ID>=@#+convert(varchar(10),(@i))+@#) a@#
exec sp_executesql @sql,N@#@s nvarchar(3000) output@#,@a output

set @a=left(@a,len(@a)-1)

set @sql=@#insert into @#+@table_name+@# select @#+@a
if len(@a)>0 exec(@sql)
insert into @sqlt select @sql
 
set @i=@i+@num1
end

select * from @sqlt
--select * from @dt
exec(@#select * from @#+@table_name)
SET NOCOUNT OFF
END

测试
exec dbo.create_table @###t2@#,@#varchar(20),datetime k@#,@#
ID                   AnDate            
99101                2002-11-24 00:00:00.000
99101                2003-11-15 00:00:00.000
99101                2003-11-29 00:00:00.000
99101                2003-12-20 00:00:00.000@#


结果
sql_statement 
--------------------------------------------------------
create table ##t2(ID varchar(20),AnDate datetime)
insert into ##t2 select @#99101@#,@#2002-11-24 00:00:00.000@#
insert into ##t2 select @#99101@#,@#2003-11-15 00:00:00.000@#
insert into ##t2 select @#99101@#,@#2003-11-29 00:00:00.000@#
insert into ##t2 select @#99101@#,@#2003-12-20 00:00:00.000@#

ID                   AnDate                                                
-------------------- ---------------------------
99101                2002-11-24 00:00:00.000
99101                2003-11-15 00:00:00.000
99101                2003-11-29 00:00:00.000
99101                2003-12-20 00:00:00.000


 

ORACLE的写法在测试中。

原文转自：http://www.ltesting.net