我需要插入非重复的值...此“合并自引用”未按预期方式工作,但未生成错误消息...我可以使用类似的东西吗?
MERGE INTO mydb.mytab AS Tref
USING mydb.mytab AS T ON Tref.id=T.id
WHEN NOT MATCHED THEN INSERT VALUES (123, 'etc');
((更新但不改变问题)似乎其他构造,如建议的here,是
INTO INTO mydb.mytab
SELECT t1.*
FROM ( select stack(2, 123,'ect1', 20,'etc2') as (id,etc) ) t1
LEFT OUTER JOIN mydb.mytab t2 ON t1.id = t2.id
WHERE t1.id is null
;
这是不优雅(还有其他吗?),但是它正在工作(!)。 MERGE有其他选择吗?
仅当mydb.mytab不包含匹配的行时,合并才会插入
MERGE INTO mydb.mytab AS Tref
USING ( select stack(2, 123,'ect1', 20,'etc2') as (id,etc) ) AS T ON Tref.id=T.id
WHEN NOT MATCHED THEN INSERT VALUES (t.id, t.etc) --columns positions should match those in Tref
;