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mysql 左连接 怎么走索引_mysql left join查询没走索引

發布時間:2023/12/10 数据库 27 豆豆
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SELECT

t0.ID as id,

t0.`NAME` as name,

t0.PHONE as phone,

t0.`CITY_CODE` as cityCode,

t0.SHOOTING_TIME as shootingTime,

t0.REMARK as remark,

t0.SOURCE_FROM as sourceFrom,-- 平臺來源

t0.REFER as refer,

t0.UPDATE_TIME as updateTime,

CONCAT(IFNULL(t0.SHOOTING_NAME,''),t1.SHOOTING_NAME) as shootingName,

t0.SHOOTING_ADDRESS as shootingAddress,

t0.CREATE_TIME as createTime,

CASE t0.OP_RESULT

WHEN 1 THEN '確認需求'

WHEN 2 THEN '無效需求'

WHEN 3 THEN '詢價需求'

WHEN 4 THEN '其他需求'

ELSE ''

END as opResultStr,

t0.OP_EXPLAIN as opExplain,

t1.ORDER_ID as orderCode,

t2.name as sysName,-- 處理人

t0.STATUS as status,

t0.OP_TIME AS opTime,

t3.COUPONS_ID AS couponsId,

t5.DESCRIPTION AS couponsDescription,

t4.`CODE` AS couponsCode,

t5.EXPIRY_DATE AS couponsExpiryDate,

t3.STATE AS couponsState,

ao.ORDER_ID AS reqOrderCode,

ao.SHOOTING_NAME AS reqShootingName,

ci.CITY_NAME as cityName

FROM

V_TBL_REQUIREMENT AS t0

-- 問題出處

left join V_TBL_USER_ORDER t1 ON t1.REQUIREMENT_ID IS NOT NULL AND t0.ID = t1.REQUIREMENT_ID

left join t_user t2 ON t0.OP_CUSTOMMANAGER_ID = t2.id

LEFT JOIN V_TBL_COUPONS_USER t3 ON t0.ID = t3.REQUIREMENT_ID

LEFT JOIN V_TBL_COUPONS t4 ON t3.COUPONS_ID = t4.ID

LEFT JOIN V_TBL_COUPONS_TEMPLATE t5 ON t4.COUPON_TEMPLATE_ID = t5.ID

LEFT JOIN V_TBL_PHOTO_ALBUM a ON a.wechatMd5 = t0.WECHAT_MD5

LEFT JOIN V_TBL_USER_ORDER ao ON ao.ID = a.orderId

LEFT JOIN V_TBL_CITY ci on ci.CITY_CODE =t0.CITY_CODE

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