nestjs valve=0 转换成buffer

在 Node.js 中，可以使用 `Buffer.from()` 方法将字符串转换为 `Buffer` 类型。因此，可以使用以下代码将字符串 "nestjs valve=0" 转换为 `Buffer` 类型：

const buffer = Buffer.from('nestjs valve=0');

现在，`buffer` 变量就包含了转换后的 `Buffer` 类型数据，可以将其用于需要 `Buffer` 类型参数的函数或方法中。

相关问题

merge into MFM_ACCOMMODATION_STANDARD a using ( <foreach collection="areaIds" item="areaId" separator="union"> select #{areaId，jdbcType=VARCHAR} AREA_ID, #{rankId，jdbcType=VARCHAR} RANK_ID, #{year，jdbcType=VARCHAR} YEAR from dual </foreach> )c on ( a.AREA ID = c.AREA_ID and a.RANK_ID = c.RANK_ID and a.YEAR = c.YEAR when matched then update set a.STAND_VALVE = #{standValue}, a.IS_SHOW = 1 when not matched then insent (a.ID,a.AREA_ID, a.RANK_ID,a.YEAR,a.STANDVALUE, a.order_id, a.IS_SHOW)values (null,C.AREA_ID, #{rankId),#{year},#{standValve},#{order},1)改写为mysql

我刚刚给你的SQL语句包含 Oracle 数据库的语法，如果你要将该语句转换为 MySQL 数据库的语法，你可以使用以下 SQL 语句：

INSERT INTO MFM_ACCOMMODATION_STANDARD 
    (ID, AREA_ID, RANK_ID, YEAR, STANDVALUE, order_id, IS_SHOW)
SELECT 
    null, 
    c.AREA_ID, 
    #{rankId}, 
    #{year}, 
    #{standValue}, 
    #{order}, 
    1 
FROM 
    (SELECT #{areaIds[0]} AS AREA_ID 
     UNION
     SELECT #{areaIds[1]} AS AREA_ID 
     UNION
     -- 可以加入更多的 areaIds
     SELECT #{areaIds[n]} AS AREA_ID) c 
LEFT JOIN 
    MFM_ACCOMMODATION_STANDARD a 
ON 
    a.AREA_ID = c.AREA_ID 
    AND a.RANK_ID = #{rankId} 
    AND a.YEAR = #{year} 
WHEN MATCHED THEN 
    UPDATE SET 
        a.STAND_VALVE = #{standValue},
        a.IS_SHOW = 1 
WHEN NOT MATCHED THEN 
    INSERT (ID, AREA_ID, RANK_ID, YEAR, STANDVALUE, order_id, IS_SHOW) 
    VALUES (null, c.AREA_ID, #{rankId}, #{year}, #{standValue}, #{order}, 1)

请注意，在 MySQL 中，我们不能使用 `FROM DUAL` 的语法，因此，我们使用 `SELECT` 语句来生成我们的虚拟表。此外，我们还使用了 `LEFT JOIN` 来确保我们没有遗漏任何区域。

<update id = "updateAccomodationStandard" merge into MFM_ACCOMMODATION_STANDARD a using ( <foreach collection="areaIds" item="areaId" separator="union"> select #{areaId，jdbcType=VARCHAR} AREA_ID, #{rankId，jdbcType=VARCHAR} RANK_ID, #{year，jdbcType=VARCHAR} YEAR from dual </foreach> )c on ( a.AREA ID = c.AREA_ID and a.RANK_ID = c.RANK_ID and a.YEAR = c.YEAR when matched then update set a.STAND_VALVE = #{standValue}, a.IS_SHOW = 1 when not matched then insent (a.ID,a.AREA_ID, a.RANK_ID,a.YEAR,a.STANDVALUE, a.order_id, a.IS_SHOW)values (null,C.AREA_ID, #{rankId),#{year},#{standValve},#{order},1) </update>改写为mysql

UPDATE MFM_ACCOMMODATION_STANDARD a
JOIN
(
SELECT
#{areaId} AS AREA_ID,
#{rankId} AS RANK_ID,
#{year} AS YEAR
FROM dual
UNION
SELECT
#{areaId2} AS AREA_ID,
#{rankId2} AS RANK_ID,
#{year2} AS YEAR
FROM dual
-- 可以加入更多的 areaIds
) c
ON a.AREA_ID = c.AREA_ID AND a.RANK_ID = c.RANK_ID AND a.YEAR = c.YEAR
WHEN MATCHED THEN
UPDATE SET a.STAND_VALVE = #{standValue}, a.IS_SHOW = 1
WHEN NOT MATCHED THEN
INSERT (ID, AREA_ID, RANK_ID, YEAR, STANDVALUE, order_id, IS_SHOW)
VALUES (null, c.AREA_ID, #{rankId}, #{year}, #{standValue}, #{order}, 1)