MERGE INTO table_name alias1 USING (table|view|sub_query) alias2 ON (join condition) WHEN MATCHED THEN UPDATE table_name SET col1 = col_val1, col2 = col_val2 WHEN NOT MATCHED THEN INSERT (column_list) VALUES (column_values); 严格意义上讲，”在一个同时存在Insert和Update语法的Merge语句中，总共Insert/Update的记录数，就是Using语句中alias2的记录数”。所以，要实现上面的功能，可以这样写： MERGE INTO T...
MERGE INTO [your table-name] [rename your table here] USING ( [write your query here] )[rename your query-sql and using just like a table] ON ([conditional expression here] AND [...]...) WHEN MATHED THEN [here you can execute some update sql or something else ] WHEN NOT MATHED THEN [execute something else here ! ] 实例：insert into TPT_PC_PRICE(tpt_nbr,tpt_user,tpt_vend,tpt_sort,tpt_part,tpt_d...
很多时候我们需要通过筛选条件同时对表进行 更新，插入，删除 等操作。这样如果我们单一的去操作表会显得很麻烦，下面会说到这个merge into 的用法会极大的优化我们操作表的时间和代码量。 举例，先新建2个表：create table book(id number,name varchar(64),price number,primary key(id) ) create table pbook as select * from book delete pbook 这里create table A as (select....) 不熟悉的人可以...
都跟alias1进行 ON (join condition)的比较，如果匹配，就进行更新的操作(Update),如果不匹配，就进行插入操作(Insert)。 因此，严格意义上讲，”在一个同时存在Insert和Update语法的Merge语句中，总共Insert/Update的记录数，就是Using语句中alias2的记录数。” 以上这句话也就很好的解释了在上面写的语句为何只能进行Update，而不能进行Insert了，因为都Select不到数据，如何能进行Insert呢:) 接下来要改成正确的语句就容易多了，...
MERGE INTO TBL_MEMBER TM -- 网站会员注册信息表USING ( SELECT SLS_CDE, -- 业务员代码对应员工代码 DPT_CDE, -- 机构代码 SLS_NME AS NAME, -- 业务员名称 SALEGRP_CDE AS SALEGRPCODE, ...
MERGE INTO TBL_MEMBER TM -- 网站会员注册信息表USING( SELECT CHA_CDE, CHA_NME, CHA_ABBR, DPT_CDE, STATUS_CHA, AUTH_FLAG, CHA_MRK, CHA_CLS, 0 || SUBSTR(CHA_TYPE,0,1) CTYPE, C_CERTF_NO, C_TEL, C_MAIL, C_ZIP_CDE, C_ADDR, CERTER_TYPE, CREATOR, ...
merge into 语法 merge into student_temp t1 using （select stu_id, stu_name, sex, credit from student） t2 on (t1.stu_id = t2.stu_id) when matched thenupdate set t1.credit = t2.credit when not matched theninsert(stu_id, stu_name, sex, credit)values (t2.stu_id, t2.stu_name, t2.sex, t2.credit); 查看结果数据，可以看到0001,002执行的是update操作，因为stu_name列并没有被更新进来，但是新增加了0003,004列数...
merge into merge into base_monitor_device musing( select s.moni_device_id,s.moni_device_name,t1.daxiong,t1.azwz from base_monitor_device s left join stationtable1 t1 on s.moni_device_name=t1.daxiong) n on( m.moni_device_id=n.moni_device_id ) when matched then update set m.install_site=n.azwz; 根据匹配项得出ID,再根据匹配到的ID插入数据oracle merge into标签：using select ...
(D.PROD_STATUS = "OBSOLETE") WHEN NOT MATCHED THEN INSERT (PROD_ID, PROD_LIST_PRICE, PROD_STATUS) VALUES (S.PROD_ID, S.PROD_NEW_PRICE, S.PROD_NEW_STATUS);Thus when a row is updated in products, Oracle checks the delete condition D.PROD_STATUS = "OBSOLETE", and deletes the row if the condition yields true. The DELETE operation is not as same as that of a complete DELETE statement. Only the rows fro...
[your table-name] [rename your table here] USING ( [write your query here] )[rename your query-sql and using just like a table] ON ([conditional expression here] AND [...]...) WHEN MATCHED THEN [here you can execute some update sql or something else ] WHEN NOT MATCHED THEN [execute something else here ! ] 使用例子：create table TEST (ID INTEGER,VALUE VARCHAR2(255) ); insert into TEST valu...
分类专栏： Oracle 版权声明：本文为博主原创文章，遵循 CC 4.0 BY-SA 版权协议，转载请附上原文出处链接和本声明。 本文链接：https://blog.csdn.net/hong10086/article/details/54342819Oracle在9i引入了merge命令, 通过这个merge你能够在一个SQL语句中对一个表同时执行inserts和updates操作.当然是update还是insert是依据于你的指定的条件判断的，Merge into可以实现用B表来更新A表数据，如果A表中没有，则把B表的数据插入...
merge into sn_balance b1 using(select ‘admin‘ as userid,1 as type1 from dual) b2 on(b1.userid=b2.userid and b1.type=b2.type1) when matched then update set b1.Remainder = (select Remainder from sn_balance t where t.userid = b1.userid and t.type = b1.type )+100 when not matched then ...
merge语句语法如下： merge into table_name tusing (subquery) s on (s.column = t.column)when matched then update ...when not matched then insert ... on关键字声明了关联条件，当有记录匹配时执行Update语句，没有匹配时，执行Insert语句。 示例 创建一张student表： create table student( sno varchar2(3) not null, -- 学生编号 sname varchar(9) not null, -- 学生姓名 ssex char(2) not null -- 性别);?表已创建。...
merge into A表 using B表 on (A表.id = B表.id) 2 when matched then --匹配到，则更新A表数据 3 update set A.col=B.col 4 when not matched then --没匹配到，往A表插入数据 5 insert (a,b,c) values (‘a‘,‘b‘,‘c‘);解释：利用B表通过A表.id=B表.id的条件来匹配A表，当满足条件时，可以对A表进行更新，当不满足条件时，可以利用inert语句插入相关数据。 案例merge into student.stuinfo_2018 A using student.stuinfo B ...
Oracle 通过一个表字段，更新另一个表字段： 方法一：通过update实现update g_sn_status Aset A.out_process_time = (select B.rec_time from g_sn_defect B where B.serial_number = A.serial_number) where A.serial_number in (select serial_number from g_sn_defect);如果where部分不存在，A、B两表不是一一对应，则会造成null更新； 方法二：通过merge into实现 merge into g_sn_status Ausing g_sn_defect B on (A.seria...