知识大全 Oracle数据库管理员职责（四）

Posted 2022-07-16 职责

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　　 analyze_p sql

　　 BEGIN 　　SYS DBMS_UTILITY ANALYZE_SCHEMA ( &OWNER PUTE ); 　　END; 　　/

　　 pop_vol sql

　　　insert into utl_vol_facts 　　select table_name 　　 NVL ( num_rows ) as num_rows 　　 trunc ( last_analyzed ) as meas_dt 　　from all_tables

　 or just user_tables　

　　 where owner in ( &OWNER )

　　or a ma separated list of owners　　

　　 / 　　mit 　　/

　　C 每周处理程序

　　 nextext sql

　　nextext sql 　　To find tables that don t match the tablespace default for NEXT extent 　　The implicit rule here is that every table in a given tablespace should 　　use the exact same value for NEXT which should also be the tablespace s 　　default value for NEXT 　　his tells us what the setting for NEXT is for these objects today 　 / / 　　

　　 SELECT segment_name segment_type ds next_extent as Actual_Next 　　 dt tablespace_name dt next_extent as Default_Next 　　FROM dba_tablespaces dt dba_segments ds 　　WHERE dt tablespace_name = ds tablespace_name 　　AND dt next_extent !=ds next_extent 　　AND ds owner = UPPER ( &OWNER ) 　　ORDER BY tablespace_name segment_type segment_name;

　　 existext sql　

　 existext sql 　 To check existing extents 　 This tells us how many of each object s extents differ in size from 　 the tablespace s default size If this report shows a lot of different 　 sized extents your free space is likely to bee fragmented If so 　 this tablespace is a candidate for reanizing 　 / / 　

　　 SELECT segment_name segment_type 　　 count(*) as nr_exts 　　 sum ( DECODE ( dx bytes dt next_extent ) ) as nr_illsized_exts 　　 dt tablespace_name dt next_extent as dflt_ext_size 　　FROM dba_tablespaces dt dba_extents dx 　　WHERE dt tablespace_name = dx tablespace_name 　　AND dx owner = &OWNER 　　GROUP BY segment_name segment_type dt tablespace_name dt next_extent;

　　 No_pk sql

　　no_pk sql 　　To find tables without PK constraint 　　 / / 　　

　　 SELECT table_name 　　FROM all_tables 　　WHERE wner = &OWNER 　　MINUS 　　SELECT table_name 　　FROM all_constraints 　　WHERE wner = &&OWNER 　　AND constraint_type = P ;

　　 disPK sql

　　disPK sql 　　To find out which primary keys are disabled 　 / / 　

　　 SELECT owner constraint_name table_name status 　　FROM all_constraints 　　WHERE wner = &OWNER AND status = DISABLED AND constraint_type = P ;

　　 nonuPK sql

　　nonuPK sql 　　To find tables with nonunique PK indexes Requires that PK names 　　follow a naming convention An alternative query follows that 　 does not have this requirement but runs more slowly 　 / / 　　

　　 SELECT index_name table_name uniqueness 　　FROM all_indexes 　　WHERE index_name like &PKNAME% 　　AND wner = &OWNER AND uniqueness = NONUNIQUE 　　SELECT nstraint_name i tablespace_name i uniqueness 　　FROM all_constraints c all_indexes i 　　WHERE c owner = UPPER ( &OWNER ) AND i uniqueness = NONUNIQUE 　　AND nstraint_type = P AND i index_name = nstraint_name

　　 mkrebuild_idx sql

　　mkrebuild_idx sql Rebuild indexes to have correct storage parameters 　　 / / 　

　　 SELECT alter index || index_name || rebuild 　　 tablespace INDEXES storage 　　|| ( initial K next K pctincrease ) ; 　　FROM all_indexes 　　WHERE ( tablespace_name != INDEXES 　　OR next_extent != ( * ) 　　) 　　AND wner = &OWNER 　　/

　　 datatype sql

　　datatype sql 　　To check datatype consistency beeen o environments 　　 / / 　

　　 SELECT table_name column_name data_type data_length data_precision data_scale nullable 　　FROM all_tab_columns first environment 　　WHERE wner = &OWNER 　　MINUS 　　SELECT table_name column_name data_type data_length data_precision data_scale nullable 　　FROM all_tab_columns@&my_db_link second environment 　　WHERE wner = &OWNER 　　order by table_name column_name

　　 obj_coord sql

　　obj_coord sql 　　To find out any difference in objects beeen o instances 　　 / / 　　 cha138/Article/program/Oracle/201311/17515