oracle error message

create user meihf identified by meihf; password cannot be typed with numbers. Otherwise, an error of 00922 will be reported

If the service does not start, it prompts ora-01034

 

The operation command of oracle is transferred from:

http://www.cnblogs.com/fromchaos/archive/2011/08/12/2135837.html

 

Oracle database is case-insensitive when querying:

1: Can be set in the local database

ALTER SESSION SET NLS_COMP=ANSI;

ALTER SESSION SET NLS_SORT=BINARY_CI;

 

2：

operate in sql statement

select * from user where lower(name)=lower("aa")