Continuing the Oracle Cheat Sheet 🙂
1. Create an Oracle user
create user xxx identified by yyy; grant connect, resource, unlimited tablespace to xxx [identified by yyy]; grant create session to xxx;
2. Extend tablespace
ALTER DATABASE DATAFILE 'C:\ORACLEXE\ORADATA\XE\SYSTEM.DBF' RESIZE 1000M;
3. Invoking UNIX commands from SQL*Plus
You can invoke a UNIX command from SQL*Plus by using “HOST COMMAND”:
host ls -la *.sql
lists all SQL files in the current directory
4. ORA-28000: the account is locked
Ever got the account locked error?
alter user system account unlock
5. If you get one of the following two Oracle errors:
ORA-12154: TNS:could not resolve the connect identifier specified
ora 06413 – connection not open
…and you are using Navicat for Oracle, then check your Navicat installation path.
In my case, the error was caused by the parenthesis in the installation path: Program Files (x86). As soon as I reinstalled Navicat in Program Files, there were no more errors.
6. How to get the size of a blob field:
select length(mycol) from mytable;
See more here
Written by Dorin Moise (Published articles: 229)