Artikel ini membawakan anda pengetahuan yang berkaitan tentang Oracle terutamanya mengatur isu yang berkaitan dengan kamus data, paparan kamus data dan paparan prestasi dinamik jadual asas dan paparan kamus data, mari kita lihat bersama-sama saya harap ia akan membantu semua orang.
Tutorial yang disyorkan: "Tutorial Video Oracle"
Kamus data merekodkan maklumat paling asas pangkalan data, termasuk jadual kamus data asas dan paparan kamus data asas dibuat oleh $ORACLE_HOMERDBMSADMINsql.bsq
1.2 Paparan kamus data
seperti:
select * from dba_objects d where d.OBJECT_NAME='USER_TABLES';
select * from dba_views d where d.view_name='USER_TABLES';
Sinonim pertanyaan:
SQL> SET LONG 10000;SQL> select d.text from dba_views d where d.view_name='USER_TABLES';TEXT--------------------------------------------------------------------------------select o.name, decode(bitand(t.property,2151678048), 0, ts.name, decode(t.ts#, 0, null, ts.name)), decode(bitand(t.property, 1024), 0, null, co.name), decode((bitand(t.property, 512)+bitand(t.flags, 536870912)), 0, null, co.name), decode(bitand(t.trigflag, 1073741824), 1073741824, 'UNUSABLE', 'VALID'), decode(bitand(t.property, 32+64), 0, mod(t.pctfree$, 100), 64, 0, null), decode(bitand(ts.flags, 32), 32, to_number(NULL), decode(bitand(t.property, 32+64), 0, t.pctused$, 64, 0, null)), decode(bitand(t.property, 32), 0, t.initrans, null), decode(bitand(t.property, 32), 0, t.maxtrans, null), decode(bitand(t.property, 17179869184), 17179869184, ds.initial_stg * ts.blocksize, s.iniexts * ts.blocksize), decode(bitand(t.property, 17179869184), 17179869184, ds.next_stg * ts.blocksize, s.extsize * ts.blocksize), decode(bitand(t.property, 17179869184), 17179869184, ds.minext_stg, s.minexts), decode(bitand(t.property, 17179869184), 17179869184, ds.maxext_stg, s.maxexts), decode(bitand(ts.flags, 3), 1, to_number(NULL), decode(bitand(t.property, 17179869184), 17179869184, ds.pctinc_stg, s.extpct)), decode(bitand(ts.flags, 32), 32, to_number(NULL), decode(bitand(o.flags, 2), 2, 1, decode(bitand(t.property, 17179869184), 17179869184, ds.frlins_stg, decode(s.lists, 0, 1, s.lists)))), decode(bitand(ts.flags, 32), 32, to_number(NULL), decode(bitand(o.flags, 2), 2, 1, decode(bitand(t.property, 17179869184), 17179869184, ds.maxins_stg, decode(s.groups, 0, 1, s.groups)))), decode(bitand(t.property, 32+64), 0, decode(bitand(t.flags, 32), 0, 'YES', 'NO'), null), decode(bitand(t.flags,1), 0, 'Y', 1, 'N', '?'), t.rowcnt, decode(bitand(t.property, 64), 0, t.blkcnt, null), decode(bitand(t.property, 64), 0, t.empcnt, null), decode(bitand(t.property, 64), 0, t.avgspc, null), t.chncnt, t.avgrln, t.avgspc_flb, decode(bitand(t.property, 64), 0, t.flbcnt, null), lpad(decode(t.degree, 32767, 'DEFAULT', nvl(t.degree,1)),10), lpad(decode(t.instances, 32767, 'DEFAULT', nvl(t.instances,1)),10), lpad(decode(bitand(t.flags, 8), 8, 'Y', 'N'),5), decode(bitand(t.flags, 6), 0, 'ENABLED', 'DISABLED'), t.samplesize, t.analyzetime, decode(bitand(t.property, 32), 32, 'YES', 'NO'), decode(bitand(t.property, 64), 64, 'IOT', decode(bitand(t.property, 512), 512, 'IOT_OVERFLOW', decode(bitand(t.flags, 536870912), 536870912, 'IOT_MAPPING', null))), decode(bitand(o.flags, 2), 0, 'N', 2, 'Y', 'N'), decode(bitand(o.flags, 16), 0, 'N', 16, 'Y', 'N'), decode(bitand(t.property, 8192), 8192, 'YES', decode(bitand(t.property, 1), 0, 'NO', 'YES')), decode(bitand(o.flags, 2), 2, 'DEFAULT', decode(bitand(decode(bitand(t.property, 17179869184), 17179869184, ds.bfp_stg, s.cachehint), 3), 1, 'KEEP', 2, 'RECYCLE', 'DEFAULT')), decode(bitand(o.flags, 2), 2, 'DEFAULT', decode(bitand(decode(bitand(t.property, 17179869184), 17179869184, ds.bfp_stg, s.cachehint), 12)/4, 1, 'KEEP', 2, 'NONE', 'DEFAULT')), decode(bitand(o.flags, 2), 2, 'DEFAULT', decode(bitand(decode(bitand(t.property, 17179869184), 17179869184, ds.bfp_stg, s.cachehint), 48)/16, 1, 'KEEP', 2, 'NONE', 'DEFAULT')), decode(bitand(t.flags, 131072), 131072, 'ENABLED', 'DISABLED'), decode(bitand(t.flags, 512), 0, 'NO', 'YES'), decode(bitand(t.flags, 256), 0, 'NO', 'YES'), decode(bitand(o.flags, 2), 0, NULL, decode(bitand(t.property, 8388608), 8388608, 'SYS$SESSION', 'SYS$TRANSACTION')), decode(bitand(t.flags, 1024), 1024, 'ENABLED', 'DISABLED'), decode(bitand(o.flags, 2), 2, 'NO', decode(bitand(t.property, 2147483648), 2147483648, 'NO', decode(ksppcv.ksppstvl, 'TRUE', 'YES', 'NO'))), decode(bitand(t.property, 1024), 0, null, cu.name), decode(bitand(t.flags, 8388608), 8388608, 'ENABLED', 'DISABLED'), case when (bitand(t.property, 32) = 32) then null when (bitand(t.property, 17179869184) = 17179869184) then decode(bitand(ds.flags_stg, 4), 4, 'ENABLED', 'DISABLED') else decode(bitand(s.spare1, 2048), 2048, 'ENABLED', 'DISABLED') end, case when (bitand(t.property, 32) = 32) then null when (bitand(t.property, 17179869184) = 17179869184) then decode(bitand(ds.flags_stg, 4), 4, case when bitand(ds.cmpflag_stg, 3) = 1 then 'BASIC' when bitand(ds.cmpflag_stg, 3) = 2 then 'OLTP' else decode(ds.cmplvl_stg, 1, 'QUERY LOW', 2, 'QUERY HIGH', 3, 'ARCHIVE LOW', 'ARCHIVE HIGH') end, null) else decode(bitand(s.spare1, 2048), 0, null, case when bitand(s.spare1, 16777216) = 16777216 -- 0x1000000 then 'OLTP' when bitand(s.spare1, 100663296) = 33554432 -- 0x2000000 then 'QUERY LOW' when bitand(s.spare1, 100663296) = 67108864 -- 0x4000000 then 'QUERY HIGH' when bitand(s.spare1, 100663296) = 100663296 -- 0x2000000+0x4000000 then 'ARCHIVE LOW' when bitand(s.spare1, 134217728) = 134217728 -- 0x8000000 then 'ARCHIVE HIGH' else 'BASIC' end) end, decode(bitand(o.flags, 128), 128, 'YES', 'NO'), decode(bitand(t.trigflag, 2097152), 2097152, 'YES', 'NO'), decode(bitand(t.property, 17179869184), 17179869184, 'NO', decode(bitand(t.property, 32), 32, 'N/A', 'YES')), decode(bitand(t.property,16492674416640),2199023255552,'FORCE', 4398046511104,'MANUAL','DEFAULT')from sys.ts$ ts, sys.seg$ s, sys.obj$ co, sys.tab$ t, sys.obj$ o, sys.deferred_stg$ ds, sys.obj$ cx, sys.user$ cu, x$ksppcv ksppcv, x$ksppi ksppiwhere o.owner# = userenv('SCHEMAID') and o.obj# = t.obj# and bitand(t.property, 1) = 0 and bitand(o.flags, 128) = 0 and t.bobj# = co.obj# (+) and t.ts# = ts.ts# and t.file# = s.file# (+) and t.block# = s.block# (+) and t.ts# = s.ts# (+) and t.obj# = ds.obj# (+) and t.dataobj# = cx.obj# (+) and cx.owner# = cu.user# (+) and ksppi.indx = ksppcv.indx and ksppi.ksppinm = '_dml_monitoring_enabled'
select * from dba_synonyms d where d.synonym_name='USER_TABLES'
Soal jadual yang dimiliki oleh pengguna yang sedang log masuk
(2) ALL_type (all_tables)
(3) DBA_type (dba_tables)
2. Paparan prestasi dinamik
Nilai semua item dalam fail parameter permulaan
v$session
Maklumat tentang sesi
v$sysstat
Statistik sistem berdasarkan operasi semasa sesi
Ekstrak maklumat tentang buat semula kumpulan log daripada fail kawalan
Contoh berkaitan Buat semula nama fail kumpulan log dan maklumat lokasi
v$lock
Maklumat kunci yang proses semasa telah peroleh dan minta
v$transaction
Maklumat transaksi pangkalan data
Rekod maklumat definisi semua paparan prestasi dinamik
Tutorial yang disyorkan: "Tutorial Video Oracle"
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