我们必须在 BigQuery 中使用 Legacy SQL。但是,Merge 在 Legacy SQL 中不起作用。我们如何在 Legacy SQL 中编写以下查询?
MERGE [ABC:xyz.tmp_cards] AS target_tbl
USING [ABC:xyz.tmp_cards_1533188902] AS source_tbl
ON target_tbl.id = source_tbl.id
WHEN MATCHED AND target_tbl.id = source_tbl.id THEN
UPDATE SET target_tbl.id = source_tbl.id,
target_tbl.user_id = source_tbl.user_id,
target_tbl.expiration_date = source_tbl.expiration_date,
target_tbl.created_at = source_tbl.created_at,
target_tbl.updated_at = source_tbl.updated_at
WHEN NOT MATCHED THEN
INSERT (id, user_id, expiration_date, created_at, updated_at)
VALUES (source_tbl.id, source_tbl.user_id, source_tbl.expiration_date, source_tbl.created_at, source_tbl.updated_at)