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sql mErgE using

SQL> select * from t_order; ORDER_ID PAY_ID MODI_DATE --------------------------------------- --------------------------------------- ----------- 1 2 2 SQL> merge into t_order using t_pay_info on (t_order.order_id=t_pay_info.or...

可以加条件, when matched then update set test_to.val = test_from.val where test_to.col='test'

你这SQL语句的逻辑有问题吧,使用 dual 表,如果不匹配的记录,全部插入到 lineloss.zwxljg 表里面了,有多少不匹配的记录就插入多少 merge into lineloss.zwxljg t1 using (select '红星-芦塘' as xlmc, '基于平均电流的均方根电流算法' as sy...

末尾加个分号 MERGE INTO TEST3 t1 USING TEST4 t2 ON (t1.NO = t2.NO) WHEN MATCHED THEN UPDATE SET t1.NAME = t2.NAME,t1.HOMETOWN = t2.HOMETOWN;

Oracle MERGE 例子 Oracle 9i 开始支持 MERGE语句 Oracle的MERGE 相对于SQL Server 2008 的 MERGE。 功能上,缺少一个 WHEN NOT MATCHED BY SOURCE 的情况。 -- 源表 CREATE TABLE test_from (id INT, val VARCHAR(20)); -- 目标表 CREATE TABLE...

merge mytable as T using(SELECT '123' as a) N on (T.a != N.a) and T.id=2 when matched thenupdate set T.a=N.a 试试这个

merge into table1 t using (select a,b,c from table2)a on (t.a=a.a and t.b=a.b) when matched then update set t.c=a.c 纯手打 ,望采纳

merge into emp01 t using emp02 f on ( t.emp_id = f.emp_id ) when matched then update set t.dept_id = f.dept_id, t.job_id = f.job_id, t.first_name = f.first_name, t.last_name = f.last_name, t.salary = f.salary when not matched t...

using后要加on关键字 表述你这个表GEN_STATISTICS和子查询之间的关系 如果你理解的不是很透彻 不建议用merge into 还是分别判断用insert update比较保险

create table #ttt(id int,name nvarchar(10)); merge into #ttt t using (select 1 as id ,'eee' as name ) b on (t.id = b.id) when matched then update set t.name = b.name when not matched then insert(id,name) values(b.id,b.name);

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