使用这个视图,可以方便的获取到指定schema的所有对象大小。 SQL> select owner,sum(bytes)/1024/1024 as vol, sum(blocks) as totalblocks,sum(extents) as totalextents from dba_segments group by owner having wner='SYS'; OWNERVOL TOTALBLOCKS TOTALEXTENTS --- --- --- --- SYS585.5749443248 上面查...
8 升级后操作1：创建spfiel文件2：执行EXECUTE dbms_stats.gather_dictionary_stats;3：重新编译4：查看失效对象5：运行升级后检查脚本1：创建spfiel文件SQL> startup pfile=/u01/app/oracle/product/11.2.0/db_1/dbs/orcl.pfileSQL> create spfile from pfile='/u01/app/oracle/product/11.2.0/db_1...
给表mytable 加评注: COMMENT ON mytable IS 'This is my table.'; 一些例子: COMMENT ON DATABASE my_database IS 'Development Database'; COMMENT ON INDEX my_index IS 'Enforces uniqueness on employee id'; COMMENT ON RULE my_rule IS 'Logs UPDATES of employee records'; COMMENT ON SEQUENCE ...
SQL > col tablespace format a20SQL > select b.file_id文件ID,b.tablespace_name表空间,b.file_name物理文件名,b.bytes总字节数,(b.bytes-sum(nvl(a.bytes,0)))已使用,sum(nvl(a.bytes,0))剩余,sum(nvl(a.bytes,0))/(b.bytes)*100剩余百分比from dba_free_space a,dba_data_files bwhere a....
SQL> create table t1(id number, comment char(50)) tablespace users pctfree 20 pctused 40 initrans 4 maxtrans 10 logging parallel cache; 1. 2. 3. 4. 5. 6. 7. 8. 9. 1.1.1. Row Migration 和 Row Chaining 1)Row Migration:如果更新时row的长度增加,超过块中可用的空闲空间,数据就需要被...
Here: AAA is the value of db_block_size ; XXX is the table name you want to check 13. 如何查看最大会话数? SELECT * FROM V$PARAMETER WHERE NAME LIKE 'proc%'; SQL> SQL> show parameter processes NAME TYPE VALUE --- --- --- aq_tm_processes integer 1 db_writer_processes integer 1...
将结果复制粘贴到plsql的comment(命令窗口)中即可 2、导出的范例 将数据库TEST完全导出,用户名system 密码manager 导出到D:\daochu.dmp中 exp system/manager@TEST file=d:\daochu.dmp full=y 将数据库中system用户与sys用户的表导出 exp system/manager@TEST file=d:\daochu.dmp owner=(system,sys) ...
Loads a SQL statement or PL/SQL block from a file into the SQL buffer. The buffer has no command history list and does not record SQLcl commands. REM[ARK] Begins a comment in a script. The REMARK command must appear at the beginning of a line, and the comment ends at the end of ...
在Oracle12c之前的版本中,rman进行数据恢复时只能进行database/tablespace/datafile/block四种级别的恢复,如果误操作删除某张表或表中数据,无法通过闪回进行数据还原时,且有完整备份以及归档,该种情况下可以进行表空间时间点恢复,但恢复方式较麻烦,在Oracle12c中,Oracle对rman功能进行了增强,除了之前的四种级别的恢复,rman...
Here:AAA is the value of db_block_size; XXX is the table name you want to check 13. 怎样审查最年夜会话数? Select * FROM V $PARAMETER Where NAME LIKE 'proc%'; SQL> SQL> show parameter processes NAME TYPE VALUE --- --- --- aq_tm_processes integer 1 db_writer_processes integer...