Sql 在循环语句Oracle9中插入id
我试图使用for循环在表中插入一组数据。对于主键,我尝试使用一个序列,但得到一个: ORA-00001:违反唯一约束(约束名称)的错误 我的代码如下所示:Sql 在循环语句Oracle9中插入id,sql,oracle,for-loop,plsql,unique-constraint,Sql,Oracle,For Loop,Plsql,Unique Constraint,我试图使用for循环在表中插入一组数据。对于主键,我尝试使用一个序列,但得到一个: ORA-00001:违反唯一约束(约束名称)的错误 我的代码如下所示: FOR a IN (select * from table a) LOOP select seq.nextval into id1 from dual; insert into table b (primarykey, value1...) select (id1, value1...) from table
FOR a IN (select * from table a)
LOOP
select seq.nextval into id1 from dual;
insert into table b (primarykey, value1...)
select (id1, value1...) from table c
end loop
知道为什么我仍然得到唯一约束错误吗?我猜表c包含多行:
FOR a IN (select * from table_a) LOOP
select seq.nextval into id1 from dual;
insert into table_b (primarykey, value1...)
select id1, value1... from table_c;
-- the same id1 will be used for many rows
-- and cause `UNIQUE` constraint violation
end loop;
我会将其改写为:
INSERT INTO table_b(primarykey, value1...)
SELECT seq.nextval, value1, ...
FROM table_c
WHERE ....;
你能告诉我确切的密码吗?