Oracle 租户执行递归 CTE 报错:-4016,内部错误 查询union 结果集和拆分单独执行 SQL 结果不符合预期 null 查询结果不正确 OceanBase 数据库 V3.2.4 版本开启向量化,通过函数索引过滤数据时结果错误 select count(nullable 列) 查询正确性问题,结果偏多 执行查询 JSON SQL 报错 the interval is invalid last_insert_...
select owner, object_name, object_type, status, dba_objects.* from dba_objects where object_type = 'view' and status = 'invalid'; select * from user_objects where object_type like 'PROCEDURE'; 20、练习题 --部门最高薪资员工信息 select ename, sal, deptno from emp where sal in (select ...
在Oracle数据库中,单独的SELECT 1是不合法的SQL语句,因为Oracle需要一个明确的表来从中选择数据。而在Oracle中,DUAL是一个特殊的单行单列表,通常用于不需要从实际表中检索数据的场合。因此,SELECT 1需要改为SELECT 1 FROM DUAL才能在Oracle中正确执行。 3. 提供正确语法 在Oracle数据库中,有效的validationquery应该是...
select sid,serial#,username,SCHEMANAME,osuser,MACHINE,terminal,PROGRAM,owner,object_name,object_type,o.object_id from dba_objects o, vlockedobjectl,vsession s where o.object_id = l.object_id and s.sid = l.session_id; 4、数据库服务器CPU、MEM、I/O性能 (1)CPU查询指令 top (2)内存查询...
2、空表dual,最常用的空表,如: select2 * 4fromdual; selectsysdatefromdual; 3、双引号能保持格式 如:selectsysdate “toDay 日期”fromdual; 4、|| 字符串连接 如:select2*3 || 8fromdual; selectename || salfromscott.emp; selectename || ‘ORACLE’fromscott.emp; ...
descemp; 2、空表dual,最常用的空表,如: select2 * 4fromdual; selectsysdatefromdual; 3、双引号能保持格式 如:selectsysdate “toDay 日期”fromdual; 4、|| 字符串连接 如:select2*3 || 8fromdual; selectename || salfromscott.emp; selectename || ‘ORACLE’fromscott.emp; ...
2、空表dual,最常用的空表,如: select2 * 4fromdual; selectsysdatefromdual; 3、双引号能保持格式 如:selectsysdate “toDay 日期”fromdual; 4、|| 字符串连接 如:select2*3 || 8fromdual; selectename || salfromscott.emp; selectename || ‘ORACLE’fromscott.emp; ...
oracle:thin:@//192.168.217.64:1521/orcljava.sql.SQLSyntaxErrorException: ORA-00923: 未找到要求的 FROM 关键字at oracle.jdbc.driver.T4CTTIoer.processError(T4CTTIoer.java:447)at oracle.jdbc.driver.T4CTTIoer.processError(T4CTTIoer.java:396)at oracle.jdbc.driver.T4C8Oall.processError(T4C8Oall....
public classInvalidSelectorException extendsJMSException This exception must be thrown when a JMS client attempts to give a provider a message selector with invalid syntax. See Also: Serialized Form Constructor Summary InvalidSelectorException(java.lang.String reason) ...
These database objects are Oracle internal procedures. It's part of the database functionality. If these are broken, your database is kind of broken. It will not work as expected. Thus, YES, there should not be any invalid objects for users SYS or SYSTEM. HOW? There are SAP notes abou...