mysql - 关于确定mysql中一条记录的level id值(用户自定义字段["level_id"])

Question

有人可以帮我处理这段代码吗？我不知道如何准确地将 1 的值从第 5 条记录开始放在 level_id 字段中。它始终保持为 0，然后第 6 条记录从 1 开始。

    CREATE DEFINER=`root`@`localhost` PROCEDURE `sp_EncodePerson`(
    in p_memberId varchar(45),
    in p_encodeId varchar(100))

    BEGIN

    DECLARE Lev0 varchar(5);
    DECLARE Lev1 varchar(5);

    SET Lev0 = "0";
    SET Lev1 = "1";

    SELECT @total := count(*) from gph_acquiredpeople 
    where member_Id = p_memberId;

IF @total <= 4 THEN 
    INSERT INTO gph_acquiredpeople
    (member_id,encoded_mem_Id,date_encoded,level_id)
    VALUES (p_memberId,p_encodeId,NOW(),Lev0);
    UPDATE gph_memberstatus SET available ="0", taken = "1"
    WHERE Id_number = p_encodeId;

ELSEIF @total = 5 OR @total >= 5 AND @total < 25 THEN
    INSERT INTO gph_acquiredpeople
    (member_id,encoded_mem_Id,date_encoded,level_id)
    VALUES (p_memberId,p_encodeId,NOW(),Lev1);
    UPDATE gph_memberstatus SET available ="0", taken = "1"
    WHERE Id_number = p_encodeId;        
ELSE
    BEGIN        
    END;
END IF;
END

Answer 1

如果我很好地理解您的问题，解决方案似乎很简单:

当您在插入记录之前进行 @total 计数检查时，您必须将 @total 与(要使用 Lev1 开始插入的记录编号)进行比较 - 1。使用当前检查，当 @total = 4 时，您继续使用 Lev0 插入，这将是您的...第五条记录。

所以会是:

CREATE DEFINER=`root`@`localhost` PROCEDURE `sp_EncodePerson`(
    in p_memberId varchar(45),
    in p_encodeId varchar(100))

    BEGIN

    DECLARE Lev0 varchar(5);
    DECLARE Lev1 varchar(5);

    SET Lev0 = "0";
    SET Lev1 = "1";

    SELECT @total := count(*) from gph_acquiredpeople 
    where member_Id = p_memberId;

IF @total < 4 THEN 
    INSERT INTO gph_acquiredpeople
    (member_id,encoded_mem_Id,date_encoded,level_id)
    VALUES (p_memberId,p_encodeId,NOW(),Lev0);
    UPDATE gph_memberstatus SET available ="0", taken = "1"
    WHERE Id_number = p_encodeId;

ELSEIF @total >= 4 AND @total < 25 THEN
    INSERT INTO gph_acquiredpeople
    (member_id,encoded_mem_Id,date_encoded,level_id)
    VALUES (p_memberId,p_encodeId,NOW(),Lev1);
    UPDATE gph_memberstatus SET available ="0", taken = "1"
    WHERE Id_number = p_encodeId;        
ELSE
    BEGIN        
    END;
END IF;
END