原来pulisher表name字段有重复
1 CREATE TABLE Publisher(
2 publisherId INTEGER NOT NULL CONSTRAINT pk_Publisher PRIMARY KEY,
3 name NVARCHAR2(200) NOT NULL
4 );
先创建一个结构的表：
1 CREATE TABLE newPublisher(
2 publisherId INTEGER NOT NULL CONSTRAINT pk_newPublisher PRIMARY KEY,
3 name NVARCHAR2(200) NOT NULL
4 );
然后
1 insert into newPublisher(publisherId,name)
2 select min(publisherId),name
3 from publisher
4 group by name;
最后重命名表
1 rename newpublisher to publisher;