hive的行转列和列转行

如下图：

1、列转行，即table1查询出table2

select

    `order_id`,

    concat_ws(',', collect_list(`item_sku_id`))

from

    table1

group by

    `order_id`;

2、行转列，即table2查询出table1

select

    `order_id`,

    `item_sku_id`

from

    table2 lateral view explode(split(item_sku_id), ',') as table as item_sku_id;