2021-06-20

DWS层做了哪些事？

1.DWS层有3-5张宽表（处理100-200个指标 70%以上的需求）

具体宽表名称：用户行为宽表，用户购买商品明细行为宽表，商品宽表，购物车宽表，物流宽表、登录注册、售后等。

2.哪个宽表最宽？大概有多少个字段？

最宽的是用户行为宽表。大概有60-100个字段

3.具体用户行为宽表字段名称

CREATE EXTERNAL TABLE dws_user_action_daycount
(
    `user_id` STRING COMMENT '用户id',
    `login_count` BIGINT COMMENT '登录次数',
    `cart_count` BIGINT COMMENT '加入购物车次数',
    `favor_count` BIGINT COMMENT '收藏次数',
    `order_count` BIGINT COMMENT '下单次数',
    `order_activity_count` BIGINT COMMENT '订单参与活动次数',
    `order_activity_reduce_amount` DECIMAL(16,2) COMMENT '订单减免金额(活动)',
    `order_coupon_count` BIGINT COMMENT '订单用券次数',
    `order_coupon_reduce_amount` DECIMAL(16,2) COMMENT '订单减免金额(优惠券)',
    `order_original_amount` DECIMAL(16,2)  COMMENT '订单单原始金额',
    `order_final_amount` DECIMAL(16,2) COMMENT '订单总金额',
    `payment_count` BIGINT COMMENT '支付次数',
    `payment_amount` DECIMAL(16,2) COMMENT '支付金额',
    `refund_order_count` BIGINT COMMENT '退单次数',
    `refund_order_num` BIGINT COMMENT '退单件数',
    `refund_order_amount` DECIMAL(16,2) COMMENT '退单金额',
    `refund_payment_count` BIGINT COMMENT '退款次数',
    `refund_payment_num` BIGINT COMMENT '退款件数',
    `refund_payment_amount` DECIMAL(16,2) COMMENT '退款金额',
    `coupon_get_count` BIGINT COMMENT '优惠券领取次数',
    `coupon_using_count` BIGINT COMMENT '优惠券使用(下单)次数',
    `coupon_used_count` BIGINT COMMENT '优惠券使用(支付)次数',
    `appraise_good_count` BIGINT COMMENT '好评数',
    `appraise_mid_count` BIGINT COMMENT '中评数',
    `appraise_bad_count` BIGINT COMMENT '差评数',
    `appraise_default_count` BIGINT COMMENT '默认评价数',
    `order_detail_stats` array<struct<sku_id:string,sku_num:bigint,order_count:bigint,activity_reduce_amount:decimal(16,2),coupon_reduce_amount:decimal(16,2),original_amount:decimal(16,2),final_amount:decimal(16,2)>> COMMENT '下单明细统计'
) COMMENT '每日用户行为'
PARTITIONED BY (`dt` STRING)
STORED AS PARQUET
LOCATION '/warehouse/gmall/dws/dws_user_action_daycount/'
TBLPROPERTIES ("parquet.compression"="lzo");