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        Oracle 插入如果不存在语句

        Oracle insert if not exists statement(Oracle 插入如果不存在语句)
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                  本文介绍了Oracle 插入如果不存在语句的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着跟版网的小编来一起学习吧!

                  问题描述

                  插入 OPT (email, campaign_id) values('mom@cox.net',100)哪里不存在(选择 * from OPT where (email ="mom@cox.net" and campaign_id =100));

                  <块引用>

                  错误报告:SQL 错误:ORA-00933:SQL 命令未正确结束00933. 00000 - SQL 命令未正确结束"*原因:
                  *动作:

                  如果 Oracle 中不存在新行,如何插入新行?

                  解决方案

                  insert into OPT (email, campaign_id)选择 'mom@cox.net',100从双重不存在的地方(选择*来自OPTwhere (email ='mom@cox.net' and campaign_id =100));

                  insert into OPT (email, campaign_id) values('mom@cox.net',100)
                  where not exists( select * from OPT where (email ="mom@cox.net" and campaign_id =100)) ;
                  

                  Error report: SQL Error: ORA-00933: SQL command not properly ended 00933. 00000 - "SQL command not properly ended" *Cause:
                  *Action:

                  how to insert a new row if it doesn't exists in Oracle?

                  解决方案

                  insert into OPT (email, campaign_id) 
                  select 'mom@cox.net',100
                  from dual
                  where not exists(select * 
                                   from OPT 
                                   where (email ='mom@cox.net' and campaign_id =100));
                  

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