Oracle常用命令

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1 错误:unable to create INITIAL extent for segment in tablespace
描述:表空间剩余空间不足以分配
解决:
1.1 SELECT F.TABLESPACE_NAME,
       (T.TOTAL_SPACE - F.FREE_SPACE)   "USED (MB)",
       F.FREE_SPACE   "FREE (MB)",
       T.TOTAL_SPACE   "TOTAL (MB)",
       (ROUND((F.FREE_SPACE / T.TOTAL_SPACE) * 100)) || '% '   PER_FREE
   FROM (SELECT TABLESPACE_NAME,
               ROUND(SUM(BLOCKS *
                         (SELECT VALUE / 1024
                            FROM V$PARAMETER
                           WHERE NAME = 'db_block_size') / 1024))   FREE_SPACE
          FROM DBA_FREE_SPACE
         GROUP BY TABLESPACE_NAME) F,
       (SELECT TABLESPACE_NAME, ROUND(SUM(BYTES / 1024/1024))   TOTAL_SPACE
          FROM DBA_DATA_FILES
         GROUP BY TABLESPACE_NAME) T
   WHERE F.TABLESPACE_NAME = T.TABLESPACE_NAME;   通用的查看表空间的剩余空间的SQL
1.2 select * from dba_data_files; 查出表空间对应的 file_name 路径
1.3 alter database datafile '/app/oracle/oradata/appdata.ora' resize 500M;或
alter database datafile '/app/oracle/oradata/appdata.ora' autoextend on next 20M maxsize 500M;