我试图在不到10000行上运行以下代码,但我得到了
ORA-00001: unique constraint (constraint_name) violated (not unexpected).
UPDATE table1 SET EMAILADRESSE = replace(EMAILADRESSE,'@domain1.no','@domain2.no') WHERE EMAILADRESSE LIKE '%@domain1.no' ;
解决方法
另一个没有EXISIS！
UPDATE table1 t1 SET EMAILADRESSE = replace(EMAILADRESSE,'@domain2.no') WHERE EMAILADRESSE LIKE '%@domain1.no' AND NOT EXISTS (SELECT 'X' FROM table1 t2 WHERE t2.EMAILADRESSE = replace(t1.EMAILADRESSE,'@domain2.no'));
