mybatis oracle merge into使用的例子 MyBatis是一种流行的Java持久层框架,可以方便地操作数据库。下面是一个使用MyBatis执行Oracle MERGE INTO操作的例子: 首先,创建两个表:一个源表(源表结构与目标表相同),一个目标表。 源表(source_table): ```sql CREATE TABLE source_table ( id NUMBER PRIMARY KEY, ...
文档:Oracle Database SQL Reference, 10g Release 2 (10.2)---1235页 Oracle MERGE INTO的用法总结: Use the MERGE statement to select rows from one or more sources for update or insertion into a table or view. You can specify conditions to determine whether to update or insert into the target...
Give an example: Create table PRODUCTS ( PRODUCT_ID INTEGER, PRODUCT_NAME VARCHAR2 (60), CATEGORY VARCHAR2 (60) ); Insert into PRODUCTS values(1501,'VIVITAR 35MM','ELECTRNCS'); Insert into PRODUCTS values(1502,'OLYMPUS IS50','ELECTRNCS'); Insert into PRODUCTS values(1600,'PLAY GYM','...
1、无条件的Inserts 你能够不用连接源表和目标表就把源表的数据插入到目标表中.这对于你想插入所有行到目标表时是非常有用的. Oracle 10g现在支持在ON条件中使用常量过滤谓词.举个常量过滤谓词例子ON (1=0).下面例子从源表插入行到表PRODUCTS,不检查这些行是否在表PRODUCTS中存在: SQL> MERGE INTO products p...
oracle官网的例子 Merging into a Table: Example The following example uses the bonuses table in the sample schema oe with a default bonus of 100. It then inserts into the bonuses table all employees who made sales, based on the sales_rep_id column of the oe.orders table. Finally, the hum...
Oracle之merge into 解析 说明:Merge语句是Oracle 9i中新增的语法,我们在进行数据推送时,经常会遇到大量的同时进行Insert/Update的语句 ,也就是说条件匹配时,就更新数据库(Update),不匹配时,就插入(Insert)到数据库。 效率:这个语法仅需要一次全表扫描就完成了全部工作,执行效率要高于INSERT+UPDATE...
oracle官网的例子 Merging into a Table: Example The following example uses the bonuses table in the sample schema oe with a default bonus of 100. It then inserts into the bonuses table all employees who made sales, based on the sales_rep_id column of the oe.orders table. Finally, the hum...
Oracle merge into 命令 作用:merge into 解决用B表跟新A表数据,如果A表中没有,则把B表的数据插入A表;当处理大数据量是,该方法的效率很高。语法: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([condit...
最近,一地市Oracle数据库跑一个Job报错,报错内容如下: 操作系统:windows server 2008R2 数据库版本:oracle 11.2.0.1 报错内容: Fri Aug 11 11:08:14 2017 Errors in file d:\app\administrator\diag\rdbms\bmi\bmi\trace\bmi_ora_2376.trc (incident=64225): ...
To insert all of the source rows into the table, you can use aconstant filter predicatein theONclause condition. An example of a constant filter predicate isON(0=1). Oracle Database recognizes such a predicate and makes an unconditional insert of all source rows into the table. This approac...