You can use Oracle OPatch utility to check all the Oracle Patches applied in Oracle database. opatch utility is located under $ORACLE_HOME/OPatch directory. You can download latest version of opatch from the Oracle Support site.
Once Oracle patch download is completed , you can open read me file for instructions to install the patches. Opatch will also show you the list of all bug fixed during patching. Sometimes patch conflict with the already applied patch and need to be roll back.
Must Read: How to Apply PSU Patch in Oracle 12c Database
Steps to Apply OJVM Patch in 12c database
How to Check Latest patch applied to the Database
1. Listing Applied Patches
To print a summary of installed patches, you can can use opatch lspatches command.
[oracle@den03adm03 admin]$ $ORACLE_HOME/OPatch/opatch lspatches 30503372;OJVM PATCH SET UPDATE 11.2.0.4.200114 29938455;OCW Patch Set Update : 11.2.0.4.191015 (29938455) 30310975;DATABASE PATCH FOR EXADATA (Jan 2020 - 11.2.0.4.200114) : (30310975)
2. Using opatch lsinventory
[oracle@orahowdb ~]$ $ORACLE_HOME/OPatch/opatch lsinventory|grep "Patch description" Patch description: "Database PSU 12.1.0.2.190716, Oracle JavaVM Component (JUL2019)" Patch description: "Database Patch Set Update : 12.1.0.2.190716 (29494060)"
3. Get detailed info Using opatch lsinventory
[oracle@orahowdb ~]$ $ORACLE_HOME/OPatch/opatch lsinventory
Oracle Interim Patch Installer version 12.2.0.1.17
Copyright (c) 2019, Oracle Corporation. All rights reserved.
Oracle Home : /scratch/u01/app/oracle/product/12.1.0/dbhome_1
Central Inventory : /scratch/u01/app/oraInventory
from : /scratch/u01/app/oracle/product/12.1.0/dbhome_1/oraInst.loc
OPatch version : 12.2.0.1.17
OUI version : 12.1.0.2.0
Log file location : /scratch/u01/app/oracle/product/12.1.0/dbhome_1/cfgtoollogs/opatch/opatch2019-10-12_11-28-58AM_1.log
Lsinventory Output file location : /scratch/u01/app/oracle/product/12.1.0/dbhome_1/cfgtoollogs/opatch/lsinv/lsinventory2019-10-12_11-28-58AM.txt
Local Machine Information::
Hostname: orahowdb
ARU platform description:: Linux x86-64
Installed Top-level Products (1):
Oracle Database 12c 12.1.0.2.0
There are 1 products installed in this Oracle Home.
Interim patches (2) :
Patch 29774383 : applied on Wed Sep 04 03:44:12 PDT 2019
Unique Patch ID: 22961858
Patch description: "Database PSU 12.1.0.2.190716, Oracle JavaVM Component (JUL2019)"
Created on 7 Jun 2019, 10:02:47 hrs PST8PDT
Bugs fixed:
29774383, 29774367, 29251241, 29254615, 19165673, 28790654, 28915933
28440711, 28502128, 28502113, 27923320, 27952584, 27952577, 27642235
27475603, 27461789, 27461842, 25649873, 27001733, 27000663, 27000690
26635845, 26637592, 26570171, 26027162, 26023002, 26023025, 25437695
25494413, 25494379, 24917972, 25067795, 24534298, 25076732, 25076756
24315824, 21659726, 24448240, 24448282, 23177536, 22675136, 23265914
23265965, 23727148, 22674709, 22670413, 22670385, 21188537, 22139226
22118835, 22118851, 21555660, 21811517, 19623450, 21566993, 21566944
19176885, 21068507, 21047803, 21047766, 20415564, 20408829, 20408866
19877336, 19855285, 19909862, 19895362, 19895326, 19153980, 19231857
19223010, 19245191, 19699946
Patch 29494060 : applied on Wed Sep 04 02:28:08 PDT 2019
Unique Patch ID: 22993235
Patch description: "Database Patch Set Update : 12.1.0.2.190716 (29494060)"
Created on 28 Jun 2019, 07:47:40 hrs PST8PDT
Bugs fixed:
19309466, 19902195, 18250893, 25437699, 19383839, 19781326, 16756406
18456643, 26546664, 22364044, 18845653, 19915271, 20172151, 18417036
19516448, 23713236, 24907917, 24796092, 23140259, 19243521, 19658708
18272672, 21153266, 19174430, 22243719, 19548064, 26556014, 20493163
20688221, 21387964, 13542050, 22250006, 22734547, 22243983, 21623164
19012119, 19932634, 19869255, 22232606, 18681056, 23324000, 25427662
22068305, 24589081, 19439759, 19303936, 22916353, 24835538, 22353346
19790243, 21106027, 26444887, 23088803, 22529728, 26256131, 19134173
24303148, 20447445, 21101873, 21188584, 19390567, 26513709, 25780343
19769480, 21097043, 21225209, 26245237, 20677396, 19284031, 19450314
19016730, 22517782, 20919320, 22205263, 22075064, 22551446, 22721409
18440095, 22496904, 16439813, 18354830, 20596234, 22022760, 20936905
23197103, 22515353, 21514877, 19809171, 21186167, 26111842, 18990023
25654936, 21492036, 18705806, 28420042, 19578247, 22024071, 22238921
22809871, 21184223, 19995869, 23089357, 19404068, 18921743, 19065677
19018447, 19018206, 18308268, 19777862, 29027694, 22223463, 19304354
22519146, 19445860, 26654363, 27199245, 22977256, 20890311, 27445727
21142837, 20869721, 24555417, 22179537, 21756699, 20217801, 18819908
22760595, 25483815, 23628685, 23007241, 19593445, 21080143, 27351628
20582405, 24966594, 20031873, 25489367, 18618122, 24737581, 21698350
26784509, 24739928, 18966843, 19077215, 20704450, 19068970, 20543011
19023822, 24713381, 20432873, 21756677, 22836801, 20328248, 18674047
18849537, 20087383, 25459958, 20315311, 22897344, 27534509, 25178179
19308965, 18948177, 19468991, 20868862, 21780146, 23315153, 20466628
21756661, 20397490, 19706965, 20302006, 24831514, 23240358, 22178855
19032777, 20862087, 19329654, 18974476, 20603378, 20859910, 19307662
26203182, 21847223, 20281121, 22568797, 19075256, 19076343, 18866977
28026866, 29511611, 22808310, 25635149, 20844426, 20904530, 20441797
21442094, 25079710, 24674955, 18840932, 18740837, 20294666, 25602488
21517440, 22062517, 19180394, 27337759, 19174942, 20671094, 21889720
19450116, 18411216, 20117253, 24386767, 20641666, 19931367, 25264559
19930276, 22092979, 25616268, 21625179, 20879709, 23003979, 20165574
28578164, 19272708, 19547370, 22624709, 23084507, 23184263, 20228093
21281532, 25093872, 19805359, 26324206, 19461270, 19434529, 18799063
20354900, 20378086, 29388020, 17008068, 21246723, 20831538, 20424899
24929210, 24560906, 20144308, 21620471, 19670108, 19068610, 20267166
25123585, 20476175, 18549238, 19297917, 22950945, 19385656, 23528412
19684504, 19330795, 21174504, 28357401, 20899461, 20557786, 21911701
19143550, 20118035, 19024808, 25760195, 20009833, 19604659, 16359751
26039623, 22820579, 19928926, 23314180, 20212067, 24737403, 20480209
18904062, 29030780, 26430737, 20856766, 17258582, 27169796, 21668627
20877664, 23272045, 19487147, 23149541, 24577566, 19430401, 19676905
20925795, 26482376, 21296029, 21629064, 23229229, 22865673, 20708701
25353983, 19280225, 21315084, 20613079, 19375649, 19213447, 19989009
18191823, 27314390, 26336977, 25775213, 24393981, 25639019, 17319928
14705949, 19703301, 28390273, 21626377, 20122715, 6418158, 23105538
26198926, 19258504, 21188532, 23151677, 24792678, 17890099, 21649497
26446098, 16887946, 26024732, 18791688, 19721304, 27012701, 19490948
19619732, 21164318, 23148260, 18090142, 21641760, 19818513, 23002524
20139391, 24693382, 19978542, 23543183, 22165897, 19373893, 22359063
19409212, 18373438, 23035249, 20677974, 18990693, 20470877, 21422580
21632821, 22351572, 20235511, 23220453, 18742258, 18604493, 23008056
22901797, 18610915, 20978259, 20832516, 24801152, 26089440, 20907061
19523462, 20505778, 19183343, 21787056, 21273804, 22782647, 25093739
17835294, 28708023, 24413809, 27846298, 18371441, 26714910, 24385983
20413820, 24421668, 28986231, 25897615, 25643931, 23195445, 21281607
20513399, 20558005, 20093776, 18909599, 20618595, 23572982, 19211433
20331945, 19512341, 22256431, 19637186, 19022470, 18607546, 26875822
24573817, 23115139, 19649152, 19201867, 21294938, 20898997, 18510194
21842740, 22454326, 24683149, 19534363, 25489607, 23061702
OPatch succeeded.
3: Detailed information on the applied patch.
[oracle@orahowdb ~]$ $ORACLE_HOME/OPatch/opatch lsinventory -details
4: As a sysdba you can also execute below command from the sql prompt to get the patch detail.
SQL> set serverout on;
SQL> exec dbms_qopatch.get_sqlpatch_status;
Patch Id : 27338041
Action : APPLY
Action Time : 18-APR-2018 15:48:43
Description : DATABASE PATCH SET UPDATE 12.1.0.2.180417
Logfile :
/scratch/u01/app/oracle/cfgtoollogs/sqlpatch/27338041/22036385/27338041_apply_D0
2NAQCD_CDBROOT_2018Apr18_15_46_27.log
Status : SUCCESS
Patch Id : 28259833
Action : APPLY
Action Time : 24-OCT-2018 03:29:23
Description : DATABASE PATCH SET UPDATE 12.1.0.2.181016
Logfile :
/scratch/u01/app/oracle/cfgtoollogs/sqlpatch/28259833/22488632/28259833_apply_D0
2NAQCD_CDBROOT_2018Oct24_03_28_14.log
Status : SUCCESS
Patch Id : 28440711
Action : APPLY
Action Time : 24-OCT-2018 03:38:12
Description : Database PSU 12.1.0.2.181016, Oracle JavaVM Component (OCT2018)
Logfile :
/scratch/u01/app/oracle/cfgtoollogs/sqlpatch/28440711/22440644/28440711_apply_D0
2NAQCD_CDBROOT_2018Oct24_03_34_30.log
Status : SUCCESS
Patch Id : 28440711
Action : ROLLBACK
Action Time : 05-MAR-2019 03:12:23
Description : Database PSU 12.1.0.2.181016, Oracle JavaVM Component (OCT2018)
Logfile :
/scratch/u01/app/oracle/cfgtoollogs/sqlpatch/28440711/22440644/28440711_rollback
_D02NAQCD_CDBROOT_2019Mar05_03_09_19.log
Status : SUCCESS
Patch Id : 28790654
Action : APPLY
Action Time : 05-MAR-2019 03:12:23
Description : Database PSU 12.1.0.2.190115, Oracle JavaVM Component (JAN2019)
Logfile :
/scratch/u01/app/oracle/cfgtoollogs/sqlpatch/28790654/22620251/28790654_apply_D0
2NAQCD_CDBROOT_2019Mar05_03_10_18.log
Status : SUCCESS
Patch Id : 28729169
Action : APPLY
Action Time : 05-MAR-2019 03:12:23
Description : DATABASE PATCH SET UPDATE 12.1.0.2.190115
Logfile :
/scratch/u01/app/oracle/cfgtoollogs/sqlpatch/28729169/22626239/28729169_apply_D0
2NAQCD_CDBROOT_2019Mar05_03_10_18.log
Status : SUCCESS
Patch Id : 28790654
Action : ROLLBACK
Action Time : 30-APR-2019 04:50:11
Description : Database PSU 12.1.0.2.190115, Oracle JavaVM Component (JAN2019)
Logfile :
/scratch/u01/app/oracle/cfgtoollogs/sqlpatch/28790654/22620251/28790654_rollback
_D02NAQCD_CDBROOT_2019Apr30_04_44_47.log
Status : SUCCESS
Patch Id : 29251241
Action : APPLY
Action Time : 30-APR-2019 04:50:11
Description : Database PSU 12.1.0.2.190416, Oracle JavaVM Component (APR2019)
Logfile :
/scratch/u01/app/oracle/cfgtoollogs/sqlpatch/29251241/22839506/29251241_apply_D0
2NAQCD_CDBROOT_2019Apr30_04_46_08.log
Status : SUCCESS
Patch Id : 29141015
Action : APPLY
Action Time : 30-APR-2019 04:50:11
Description : DATABASE PATCH SET UPDATE 12.1.0.2.190416
Logfile :
/scratch/u01/app/oracle/cfgtoollogs/sqlpatch/29141015/22785785/29141015_apply_D0
2NAQCD_CDBROOT_2019Apr30_04_46_08.log
Status : SUCCESS
Patch Id : 29251241
Action : ROLLBACK
Action Time : 04-SEP-2019 04:09:43
Description : Database PSU 12.1.0.2.190416, Oracle JavaVM Component (APR2019)
Logfile :
/scratch/u01/app/oracle/cfgtoollogs/sqlpatch/29251241/22839506/29251241_rollback
_D02NAQCD_CDBROOT_2019Sep04_04_06_10.log
Status : SUCCESS
Patch Id : 29774383
Action : APPLY
Action Time : 04-SEP-2019 04:09:43
Description : Database PSU 12.1.0.2.190716, Oracle JavaVM Component (JUL2019)
Logfile :
/scratch/u01/app/oracle/cfgtoollogs/sqlpatch/29774383/22961858/29774383_apply_D0
2NAQCD_CDBROOT_2019Sep04_04_07_20.log
Status : SUCCESS
Patch Id : 29494060
Action : APPLY
Action Time : 04-SEP-2019 04:09:43
Description : DATABASE PATCH SET UPDATE 12.1.0.2.190716
Logfile :
/scratch/u01/app/oracle/cfgtoollogs/sqlpatch/29494060/22993235/29494060_apply_D0
2NAQCD_CDBROOT_2019Sep04_04_07_20.log
Status : SUCCESS
PL/SQL procedure successfully completed.
5: To get information on particular patch ID.
SQL> select xmltransform(dbms_qopatch.is_patch_installed('29494060'),dbms_qopatch.get_opatch_xslt) "Patch installed?" from dual;
Patch installed?
Patch Information:
29494060: applied on 2019-09-04T02:28:08-07:00
6: Patch detail from registry
SQL> select * from sys.registry$history;
SQL> select * from sys.dba_registry_sqlpatch;