将两个表合并为一个

Question

我正在尝试合并两个表，但我是合并函数的新手

ppltr

pltr_seqn_num    pltr_user     
1              
2              
3              
4                       Chris

poant

poat_pltr_seqn_num      poat_user

2                       Sam 
3                       Dave
4                       Chris

merge into ppltr a
using poant b
on (a.pltr_seqn_num=b.poat_pltr_seqn_num)
when not matched then insert(a.pltr_user) values (b.poat_user)

我希望ppltr使用merge来获取poant的所有用户名值，有人可以建议我如何完成这项工作吗？

Answer 1

试试这个：

MERGE INTO ppltr a USING poant b ON (a.pltr_seqn_num=b.poat_pltr_seqn_num) 
WHEN MATCHED THEN
UPDATE SET a.pltr_user = b.poat_user;

Answer 2

试试这个。正确的isome次要语法错误，如果它有：

 MERGE INTO ppltr a
   USING (SELECT poat_pltr_seqn_num, poat_user FROM poant) b
   ON (a.pltr_seqn_num = b.poat_pltr_seqn_num)
   WHEN MATCHED THEN 
     UPDATE SET a.pltr_user  = b.poat_user
   WHEN NOT MATCHED THEN 
     INSERT (a.pltr_seqn_num , a.pltr_user  )
     VALUES (b.poat_pltr_seqn_num, b.poat_user );