根据表生成流水号

CREATE TABLE [dbo].[TableWater](
[Tb_id] [int] IDENTITY(1,1) NOT NULL,
[Vc_table_name] [nvarchar](90) NULL,
[Num_water_no] [varchar](100) NULL,
CONSTRAINT [PK_TableWater] PRIMARY KEY CLUSTERED
(
[Tb_id] ASC
)WITH (PAD_INDEX = OFF, STATISTICS_NORECOMPUTE = OFF, IGNORE_DUP_KEY = OFF, ALLOW_ROW_LOCKS = ON, ALLOW_PAGE_LOCKS = ON) ON [PRIMARY]
) ON [PRIMARY]

测试表

测试参数

DECLARE @return_value int, @vmax_waterno bigint

EXEC @return_value = [dbo].[get_waterno] @vtableName = N'testtable', @vcnt = 1, @vmax_waterno = @vmax_waterno OUTPUT

SELECT @vmax_waterno as N'@vmax_waterno'

SELECT 'Return Value' = @return_value

SQL Server 实现：

create PROCEDURE [dbo].[get_waterno]
(
@vtableName   VARCHAR(90), --表名
@vcnt         INT ,--流水号
@vmax_waterno    bigint  output --最大流水号
)
as
BEGIN
declare @Vcount int;
set  @vmax_waterno=0;
SELECT  @Vcount=count(1)  FROM TableWater WHERE vc_table_name=@vtableName ;

IF (@Vcount= 0 or @Vcount is null)
BEGIN
INSERT INTO TableWater(vc_table_name,num_water_no) VALUES(@vtableName, @vcnt );
set  @vmax_waterno=@vcnt;
--return;
END;

ELSE
BEGIN
DECLARE @i bigint;

set @i= 1;
WHILE (@i<= 1000)
begin
UPDATE TableWater SET num_water_no=num_water_no+@vcnt
WHERE vc_table_name =@vtableName ;

IF (@Vcount > 0 )
BEGIN
SELECT  @vmax_waterno=num_water_no FROM TableWater WHERE vc_table_name=@vtableName;
-- return ;
break;
end;

ELSE
BEGIN
set @i= @i + 1;
SELECT   @vmax_waterno=num_water_no FROM TableWater WHERE vc_table_name=@vtableName and num_water_no=@vmax_waterno ;
set @vmax_waterno= NULL;
--return ;
break;
end;
end;
end;
end;

SQL 调用

---调用存储过程   生成结果表流水号

exec  get_waterno "testtable",1,@p_tmp_water_num output;
set @p_tmp_water_str= replicate('0',10)+ltrim (@p_tmp_water_num);

Oracle 实现：

PROCEDURE spr_get_waterno
(

vtableName IN  VARCHAR2, --表名
vcnt       IN  INT ,--流水号
vmax_waterno OUT  number --最大流水号

)
is
Vcount int;

BEGIN

vmax_waterno:= 0;

SELECT count(1) into Vcount FROM TableWater WHERE vc_table_name = vtableName ;

IF (Vcount= 0 or Vcount is null)
THEN
BEGIN
INSERT INTO TableWater(vc_table_name,num_water_no) VALUES(vtableName, vcnt );
vmax_waterno:= vcnt;
--select max_waterno
return;-- max_waterno;
commit;
END;
ELSE
BEGIN
DECLARE i INTEGER;
begin
i:= 1;
WHILE  i<= 1000
loop
UPDATE TableWater  SET num_water_no = num_water_no + vcnt
WHERE vc_table_name = vtableName  ;-- and num_water_no  = max_waterno;
commit;
IF (Vcount > 0 )

THEN
BEGIN
SELECT num_water_no INTO vmax_waterno FROM TableWater WHERE vc_table_name = vtableName;
-- SET max_waterno = max_waterno + cnt;
-- select max_waterno;
return ;

END ;
ELSE
BEGIN
i:= i + 1;
-------------------------------------------------------------------------------
SELECT num_water_no INTO vmax_waterno FROM TableWater WHERE vc_table_name = vtableName and vmax_waterno = num_water_no ;
------------------------------------------------------------------------
vmax_waterno:= NULL;
--select max_waterno;
return ;

END;
END IF;
END  loop;
vmax_waterno:= NULL;
return;
END;
end;
END IF;
COMMIT;

END;

oracle 调用

---调用存储过程   生成结果表流水号
spr_get_waterno('testtable',1,p_tmp_water_num);
p_tmp_water_str:= LPAD(p_tmp_water_num,20,'0');