select job,what,last_date,next_date,failures,broken from dba_jobs Where schema_user='system'; (3)检查失效的索引 select index_name, table_name, tablespace_name, status From dba_indexes Where owner = 'system' And status <> 'VALID'; 说明:分区表上的索引status为空是正常的,如有失效索引则对...
以用户身份连接时收集Oracle数据库中的dba_users信息 、 我是Oracle数据库的新手。我看到,如果我以sys用户身份连接,我可以但是,一旦我完成了conn nonsys@dbid,我就不能再这样做了;我会得到一个错误消息:select* from sys.dba_users;也不起作用。在以非系统用户身份连接后,我如何进行select* from dba_users;?
SELECT、DISTINCT和FROM是三个关键字。一条SELECT语句总是包含两个或者更多子句。两个强制子句是SELECT子句和FROM子句。管道符号(|)表示OR。因此可以将上面SELECT语句的第一种形式读作:SELECT * FROM table; 在这种格式中,星号(*)表示所有列。SELECT *是要求Oracle服务器返回所有可能列的简洁方式。我们将它作为一种...
FROM DUAL; SELECT 100 + 'a' #此时将'a'看做0处理 FROM DUAL; SELECT 100 + NULL # null值参与运算,结果为null FROM DUAL; SELECT 100, 100 * 1, 100 * 1.0, 100 / 1.0, 100 / 2, 100 + 2 * 5 / 2,100 / 3, 100 DIV 0 # 分母如果为0,则结果为null FROM DUAL; # 取模运算: % ...
查询出所有job名称selectnamefromIBDMMSQL.msdb.dbo.sysjobswhereenabled=1andnamenotlike‘Database%’andnamenotlike‘DB%’orderby1把job名称当成第二个字段的value值(如下的’job_name’)插入[jobs].[Settings]insertinto[jobs].[Settings]values(3008,‘job_name’,null,null,GETDATE(),‘Lukes Liao’,null...
2 SQL*Net roundtrips to/from client 0 sorts (memory) 0 sorts (disk) 1 rows processed 2) select 查询中免避应用'*' 当你想在SELECT句子中列出有所的COLUMN时,应用动态SQL列引用 '*' 是一个便利的方法.幸不的是,这是一个非常低效的方法.现实 ...
select last_name, e.job_id, jobs.job_title from jobs, employees as e where jobs.job_id = e.job_id; #4、可以加筛选 #案例:查询有奖金的员工名、部门名 select last_name, departments.department_name from employees as e, departments where commission_pct is not null and e.department_id = ...
You may also crosscheck last_ddl_time from dba_objects at same timestamp. This issue mostly talks about concurrency of DDL & select operation. So avoid this concurrent operations. Also this can happen block corruption as well. See MOS note OERR: ORA-8103 “object no longer exists” ...
SQL> SELECT owner, object_type FROM dba_objects WHERE object_name = ‘V$SESSION’; OWNER OBJECT_TYPE ———- PUBLIC SYNONYM SQL> SELECT owner, object_type FROM dba_objects WHERE object_name = ‘V$INSTANCE’; OWNER OBJECT_TYPE ———...
This section for getting the current message / active variant from children is a little confusing to me and runs into the challenge we've been having with matching on children 🤔 Would it be possible for the message component to read a context value that specifies what the current variant ...