SQL Server主键自动生成_表and存储过程

主键表：

CREATE TABLE [dbo].[KEYCODE](
 [KeyName] [varchar](12) NOT NULL,
 [KeyTableName] [varchar](40) NULL,
 [KeyFieldName] [varchar](30) NULL,
 [StrLen] [int] NULL,
 [CodeLen] [int] NULL,
 [CodeMin] [float] NULL,
 [CodeMax] [float] NULL,
 [CodeType] [varchar](1) NULL,
 [CurrentCode] [float] NULL,
 [FirstLoop] [varchar](1) NULL,
 [Prefix] [varchar](6) NULL,
 [Suffix] [varchar](6) NULL,
 [Remarks] [varchar](500) NULL,
 CONSTRAINT [PK_KEYCODE] PRIMARY KEY CLUSTERED 
(
 [KeyName] ASC
)WITH (PAD_INDEX  = OFF, STATISTICS_NORECOMPUTE  = OFF, IGNORE_DUP_KEY = OFF, ALLOW_ROW_LOCKS  = ON, ALLOW_PAGE_LOCKS  = ON, FILLFACTOR = 90) ON [PRIMARY]
) ON [PRIMARY]

主键生成SQL：

Create Procedure [dbo].[SP_GetKeyCode]
	@KeyName	Varchar(20),
	@KeyCode	Varchar(30) Output,
	@IsReturn	Bit = 0
AS
Declare	@zeroStr as Varchar(30),@MaxRunningCode as Varchar(30),
	@KeyTableName as Varchar(40),@KeyFieldName as Varchar(40),
	@CodeLen as Smallint,@CodeMin as Decimal(20,0),@CodeMax as Decimal(20,0),
	@CodeType as Varchar(1),@CurrentCode as Decimal(20,0),@FirstLoop as varchar(1),
	@Prefix as Varchar(6),@Suffix as Varchar(6),@preFixStr as Varchar(10),
	@tmpstr as Varchar(30),@tempStr1 as Varchar(40),@sSQL as Varchar(400),
	@CCode as Decimal(20,0), @RetStr as Varchar(20),@CurrentKeyCode as Varchar(30),
	@I as smallint,	@HeadStr as Varchar(20)
DECLARE @TableNameStartPos	SmallInt

set @zeroStr = '000000000000000000000000000000'
Set @MaxRunningCode= '999999999999999999999999999999'
set @KeyName = Upper(@KeyName)
--set @HeadStr = upper(@HeadStr)
if not exists(Select * from KeyCode where KeyName = @KeyName) 
Begin
	If @IsReturn = 1 
	Begin
		Select @KeyName keyname, '' KeyCode
		Set @KeyCode = ''
		Return
	End
	RaisError('%s is an invalid KeyName!',16,1,@KeyName)
	Select @KeyCode = ''
	Return
end

Select	@KeyTableName = IsNull(KeyTableName,''), 
	@KeyFieldName = IsNull(KeyFieldName,''),
	@CodeLen = IsNull(CodeLen,0), 
	@CodeMin = Cast(IsNull(CodeMin,0) as Decimal(20,0)),
	@CodeMax = cast(IsNull(CodeMax,99) as Decimal(20,0)),
	@CodeType = IsNull(CodeType,'1'),
	@CurrentCode = Cast(IsNull(CurrentCode,0) as Decimal(20,0)), 
	@FirstLoop = IsNull(FirstLoop,'0'), 
	@Prefix = IsNull(Prefix,''), 
	@Suffix = IsNull(Suffix,'')
From KeyCode Where KeyName = @KeyName

-- To exclude alias from KeyTableName (:DELIBASE:DELORD --> DELORD)
set @tableNameStartPos=Patindex('%BASE:%',@KeyTableName)
if @tableNameStartPos>0
	set @KeyTableName=subString(@KeyTableName,@TableNameStartPos+5,len(@KeyTableName)-@TableNameStartPos-4)

Set @HeadStr = @Prefix

Set @preFixStr=''

if @CodeType = '1'
Begin
	if @FirstLoop = '1' 
		set @tmpstr = Cast((@CurrentCode + 1) as Varchar(20))
	else 
	begin
		set @tmpstr = Cast((@CurrentCode+1) as Varchar(20))
		set @CCode = @CurrentCode + 1
		Update KeyCode set CurrentCode =Cast(@CCode as Decimal(20,0)) where keyname = @KeyName
		set @TempStr1= @HeadStr + SubString(@zerostr,1,@CodeLen - len(@tmpstr))+ @tmpstr
		if @CCode > @CodeMax ---Find from beginning
		begin
			If @IsReturn = 1 
			Begin
				Select 'Error' KeyName, 'All numbers are occupied!' KeyCode
				Set @KeyCode = ''
				Return
			End
			raisError('All numbers are occupied!',16,1)
			Select @KeyCode = ''
			return 
		end			
	end --- FirstLoop <>'1'
	set @retstr = @TmpStr
end  --- CodeType ='1'
if @CodeType = '2' --- YY + XXXXXX
Begin  
	set @prefixStr = SUbString(Cast(year(GetDate()) as Varchar(4)),3,2)
	if @KeyTableName <> @prefixStr 
	begin
		set @CurrentCode = @COdeMin -1
		Update KeyCode set KeyTableName =  @prefixStr,CurrentCode = @CurrentCode
		where KeyName = @KeyName
	end
	set @retStr=Cast((@CurrentCode+1) as Varchar(10))
end
if @CodeType = '3' --YY + MM + XXXXXX
begin
	Set @PrefixStr = Cast(Month(GetDate()) as Varchar(2))
	if len(@PrefixStr)=1 
		Set @PrefixStr = '0' + @PrefixStr
	set @prefixStr = SUbString(Cast(year(GetDate()) as Varchar(4)),3,2) + @PrefixStr
	if @KeyTableName <> @prefixStr
	begin
		set @CurrentCode=@CodeMin - 1
		Update KeyCode set KeyTableName =  @prefixStr,CurrentCode = @CurrentCOde
		where KeyName = @KeyName
	end
	set @retStr=Cast((@CurrentCode+1) as Varchar(10))
end
if @CodeType = '4'   --	YY+MM+DD+xxxxx
Begin
	Set @TmpStr = Cast(Month(GetDate()) as Varchar(2))
	if len(@tmpStr)=1 
		Set @tmpStr = '0' + @tmpStr
	Set @tempStr1 = Cast(day(GetDate()) as Varchar(2))
	if len(@tempStr1)=1 
		Set @tempStr1 = '0' + @tempStr1	
	set @prefixStr = SUbString(Cast(year(GetDate()) as Varchar(4)),3,2) + @tmpStr+@tempStr1
	if @KeyTableName <> @prefixStr 
	begin
		set @CurrentCode = @CodeMin -1 
		Update KeyCode set KeyTableName =  @prefixStr,CurrentCode = @CurrentCode
		where KeyName = @KeyName
	end
	set @retStr=Cast((@CurrentCode+1) as Varchar(10))
end
if @CodeType = '5'  -- YYYY+MM+xxxxx
begin
	Set @PrefixStr = Cast(Month(GetDate()) as Varchar(2))
	if len(@PrefixStr)=1 
		Set @PrefixStr = '0' + @PrefixStr
	set @prefixStr = Cast(year(GetDate()) as Varchar(4)) + @PrefixStr
	if @KeyTableName <> @prefixStr
	begin
		set @CurrentCode=@CodeMin - 1
		Update KeyCode set KeyTableName =  @prefixStr,CurrentCode = @CurrentCOde
		where KeyName = @KeyName
	end
	set @retStr=Cast((@CurrentCode+1) as Varchar(10))
end

If @CodeType = '7'   -- DDxxxx  Moorthy 19/10/00
Begin
	Set @tmpStr = Cast(Day(GetDate()) As Varchar(2))
	set @PrefixStr = @PRefixStr + replicate('0',2-len(@TmpStr)) + @TmpStr
	if @KeyTableName <> @Prefixstr
	begin
		set @CCode = @CodeMin - 1
		Update KeyCode set KeyTableName = @prefixStr,CurrentCode = @CodeMin - 1
		where KeyName = @KeyName
	end
	set @retStr = Cast((@CurrentCode+1) as Varchar(10))
End

if @CodeType = '8'    -- xYMxxxx ----  running number reset monthly

Begin
	Set @tmpStr = Cast(Right(Year(GetDate()),1) As Varchar(2))
	If Cast(Month(GetDate()) As Varchar(2)) = '10'
	   Set @TmpStr = @TmpStr + 'A' 
        Else If Cast(Month(GetDate()) As Varchar(2)) = '11'
	   Set @TmpStr =  @TmpStr + 'B'
        Else If Cast(Month(GetDate()) As Varchar(2)) = '12'
	   Set @TmpStr =  @TmpStr + 'C' 
	Else
	   Set @TmpStr =  @TmpStr + Cast(Month(GetDate()) As Varchar(2)) 

	set @PrefixStr = @PRefixStr + replicate('0',2-len(@TmpStr)) + @TmpStr
	if @KeyTableName <> @Prefixstr
	begin
		set @CCode = @CodeMin - 1
		Update KeyCode set KeyTableName = @prefixStr,CurrentCode = @CodeMin - 1
		where KeyName = @KeyName
	end
	set @retStr = Cast((@CCode+1) as Varchar(10))
End



if cast(@retstr as Decimal(20,0)) = @CodeMax  -- modify CurrentCode
	Update KeyCode set CurrentCode = @CodeMin -1 where KeyName = @KeyName
else
	Update KeyCode set CurrentCode =Cast(@retstr as Decimal(20,0)) where keyname = @KeyName
Set @retstr = @HeadStr+	@PrefixStr + SubString(@zeroStr,1,@CodeLen-len(@retstr))+ @retstr+ @Suffix
Select @KeyCode = @RetStr

If @IsReturn = 1 
Begin
	Select @KeyName KeyName, @KeyCode KeyCode
	Set @KeyCode = ''
	Return
End