[oracle@db12cr2 bin]$ sqlplus / as sysdba SQL*Plus: Release 12.2.0.1.0 Production on Wed Mar 15 05:39:28 2017 Copyright (c) 1982,2016,Oracle. All rights reserved. Connected to: Oracle Database 12c Enterprise Edition Release 12.2.0.1.0 - 64bit Production SQL> show parameter case NAME TYPE VALUE ------------------------------------ ----------- ---------- sec_case_sensitive_logon boolean TRUE ----------->>>参数值是TRUE,默认值就是TRUE. SQL> create user c##test identified by db12c; User created. SQL> grant create session to c##test; Grant succeeded. SQL> conn c##test/db12c ------>>>注意是小写的c Connected. SQL> conn c##test/db12C ------>>>注意是大写的C ERROR: ORA-01017: invalid username/password; logon denied ----------->>>这意味着12c默认就是区分大小写的. Warning: You are no longer connected to ORACLE. SQL>
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