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  • 生成最大单号 scope_identity

    -- 假定要给T_0101001创建一个Sequence
    -- 创建表SeqT_0101001
    create table SeqT_0101001(
          -- ID列为自增列
          SeqID int identity(1,1) primary key,
          -- Sequence值
          SeqVal varchar(1)
    )
    
    -- 创建从SeqT_0101001表获取最新Sequence值的存储过程
    create procedure P_GetNewSeqVal_SeqT_0101001
    as
    begin
          -- 声明新Sequence值变量
          declare @NewSeqValue int
          -- 设置插入、删除操作后的条数显示取消
          set NOCOUNT ON
          -- 插入新值到SeqT_0101001表
          insert into SeqT_0101001 (SeqVal) values ('a')   
          -- 设置新Sequence值为插入到SeqT_0101001表的标识列内的最后一个标识值  
          set @NewSeqValue = scope_identity()   
          -- 删除SeqT_0101001表(不显示被锁行)
          delete from SeqT_0101001 WITH (READPAST)
    -- 返回新Sequence值
    return @NewSeqValue
    END
    
    --使用Sequence
    Declare @NewSeqVal int
    Exec @NewSeqVal =  P_GetNewSeqVal_SeqT_0101001
    Print @NewSeqVal
    select Convert(char(8),Getdate(),112) + right('00000'+CAST(@NewSeqVal AS varchar(5)),5) as mySeq
    
    --TRUNCATE  table  SeqT_0101001
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  • 原文地址:https://www.cnblogs.com/zoumin123/p/9276631.html
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