在MyBatis中针对Oracle数据库进行批量新增数据,可以通过几种不同的方式实现。以下是几种常见的方法: 方法一:使用<foreach>标签结合INSERT ALL语句 这种方法利用了Oracle的INSERT ALL语法,可以在一个SQL语句中插入多条记录。 xml <insert id="batchInsert" parameterType="java.util.List"> INSERT ALL...
把SQL复制出来在PL/SQL中运行也是报同样的错,如上也可以看出,使用批量插入执行的SQL语句等价于: INSERT INTO T_OCL_SUPCITY (CITY_ID,CITY_CODE, CITY_NAME, AREA_DESC, SUP_ID, STAT) VALUES (?,?,?,?,?),(?,?,?,?,?),而在oracle中用insert into xxx values (xxx,xxx),(xxx,xxx) 这种语法是...
从上面可以看出,使用foreach进行批量插入,原理上就是让多条insert into插入语句变成一条插入语句,可以带来性能上的提升,但同时也带来了两个问题:(1)当插入的数据较多时,相当于拼接的sql语句会特别的长,甚至超过sql语句的长度,一旦超出,就会抛出异常导致无法插入。(2)当插入的数据较多时,也比较耗时,针对...
Insert inside Mybatis foreach is not batch, this is a single (could become giant) SQL statement and that brings drawbacks: some database such as Oracle here does not support. in relevant cases: there will be a large number of records to insert and the database configured limit (by defaul...
</foreach> )A </insert> 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. 12. 13. 14. 运行通过。在Oracle的版本中,有几点需要注意的: 1.SQL中没有VALUES; 2.<foreach>标签中的(selece ... from dual); 3.<foreach>标签中的separator的属性为"UNION ALL",将查询合并结果集。
Insert inside Mybatis foreach is not batch, this is a single (could become giant) SQL statement and that brings drawbacks: some database such as Oracle here does not support. in relevant cases: there will be a large number of records to insert and the database configured limit (by defaul...
4.MyBatis+Oracle批量插入数据的正确做法 <insert id="batchInsert"parameterType="list"useGeneratedKeys="false">insert intoS_DATUM_PAGE(PAGE_ID,ENTRY_ID,DATUM_ID,CONTENT_LENGTH,CREATED_TIME,NAME_TIME,IMAGE_FORMAT,PAGE_ORDER,PATH)SELECTPAGE_ID_SEQ.NEXTVAL,a.*FROM(<foreach collection="list"item="ite...
在MyBatis中,<foreach>标签与<if>、<choose>等标签的功能有所不同。以下是它们的对比: 四、代码示例扩展 4.1 Oracle批量插入示例 在Oracle数据库中,可以通过INSERT ALL语句实现批量插入: INSERTALLINTOemployee(name,salary,hire_date)VALUES('Alice',5000.00,SYSDATE)INTOemployee(name,salary,hire_date)VALUES('Bob...
最近在使用MyBatis操作Oracle数据库的时候,进行批量插入数据,思路是封装一个List集合通过Myabtis 的foreach标签进行循环插入,可是搬照Mysql的批量插入会产生 异常 ### Error updating database. Cause: java.sql.SQLSyntaxErrorException: ORA-00933: SQL 命令未正确结束 ...
Insert inside Mybatis foreach is not batch, this is a single (could become giant) SQL statement and that brings drawbacks: some database such as Oracle here does not support. in relevant cases: there will be a large number of records to insert and the database configured limit (by defaul...