根据表名的流水号生成存储过程

 1 ----流水号配置表-----
 2 CREATE TABLE [dbo].[shg](
 3     [tableName] [varchar](50) COLLATE Chinese_PRC_CI_AS NOT NULL,
 4     [preLetter] [varchar](50) COLLATE Chinese_PRC_CI_AS NULL,
 5     [placeLength] [int] NULL,
 6     [beginNum] [int] NULL,
 7     [endNum] [int] NULL,
 8     [currentNum] [int] NULL,
 9     [regTime] [datetime] NULL,
10     [Step] [smallint] NULL,
11     [Description] [varchar](50) COLLATE Chinese_PRC_CI_AS NULL,
12  CONSTRAINT [PK_shg] PRIMARY KEY CLUSTERED 
13 (
14     [tableName] ASC
15 )WITH (PAD_INDEX  = OFF, STATISTICS_NORECOMPUTE  = OFF, IGNORE_DUP_KEY = OFF, ALLOW_ROW_LOCKS  = ON, ALLOW_PAGE_LOCKS  = ON) ON [PRIMARY]
16 ) ON [PRIMARY]
17 
18 ---流水号生成器---
19 
20 set ANSI_NULLS ON
21 set QUOTED_IDENTIFIER ON
22 go
23 
24 -- =============================================
25 -- Author:    <anncesky>
26 -- Create date: <2010/3/16>
27 -- Description:    <生成流水号>
28 -- =============================================
29 CREATE PROCEDURE [dbo].[sp_AutoSht] 
30      @tableName varchar(50),   --表名
31      @isAdd bit = 0,           --运行存储过程后是否自增1:是 0:否
32      @result varchar(50) output--传出的流水号
33 AS
34      declare @sqlTemp nvarchar(100),
35 @preLetter varchar(50),@placeLength int,@beginNum int,@endNum int,@currentNum int,@Step int
36 BEGIN
37     SET NOCOUNT ON;
38     if EXISTS (select tableName from shg where tableName=@tableName)
39     begin
40         select @preLetter=preLetter,@placeLength=placeLength,@beginNum=beginNum,@endNum=endNum,
41 @currentNum=currentNum,@Step=Step from shg where tableName=@tableName
42     end
43     else
44     begin
45         --return 0
46         set @preLetter='Null'
47         set @placeLength=6
48         set @beginNum=1
49         set @endNum=999999
50         set @currentNum=1
51         set @Step=1
52         insert into shg(tableName,preLetter,placeLength,beginNum,endNum,currentNum,Step,regTime) 
53 values(@tableName,@preLetter,@placeLength,@beginNum,@endNum,@currentNum,@Step,getdate())
54     end
55     if @isAdd=1
56     begin
57         if len(@currentNum+@Step)<=@placeLength
58             update shg set currentNum=currentNum+@Step where tableName=@tableName
59         else
60         begin
61             --RAISERROR('超出原定范围',16,1)
62             update shg set placeLength=placeLength+1,currentNum=currentNum+@Step where tableName=@tableName
63         end
64     end
65     set @result=@preLetter+replicate('0',@placeLength-len(@currentNum))+cast(@currentNum as varchar)
66 
67     return 1
68 END


----测试----
declare @r varchar(50)
--set @r='ddd'
exec sp_AutoSht 'aaa',1,@r output
print @r