[英]Oracle MERGE does not INSERT
我有這個簡單的例子,我似乎無法工作:
MERGE INTO mytable mt
USING dual
ON (mt.id = 'AAA' )
WHEN MATCHED THEN
UPDATE SET mt.name = 'updated'
WHEN NOT MATCHED THEN
INSERT (mt.id , mt.name )
VALUES ('AAA', 'Gooood' );
如果表中存在“AAA”記錄,則會成功更新。
但如果不存在,則不插入:
Affected rows: 0
Time: 0.003ms
關於我做錯了什么的任何線索?
適合我:
SQL> create table mytable (id varchar(3), name varchar(30));
Table created.
SQL> MERGE INTO mytable mt
2 USING dual
3 ON (mt.id = 'AAA' )
4 WHEN MATCHED THEN
5 UPDATE SET mt.name = 'updated'
6 WHEN NOT MATCHED THEN
7 INSERT (mt.id , mt.name )
8 VALUES ('AAA', 'Gooood' );
1 row merged.
SQL> select * from mytable;
ID NAME
--- ------------------------------
AAA Gooood
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