Here are few links/ pages for new/beginner DBAs

System Administration/ Unix Scripts

Monitoring CPU output on Solaris and report in excel
tail and grep tools for DBA
Good Linux / Unix System Admin Commands for DBA
Check Hardware configuration of Linux Box
grep next / previous few lines of key word
Collect and report Linux System Activity Information with sar
cpu vs core vs sockets - calculation 
Useful Shell commands and Scripts

Oracle Golden Gate

 

Oracle DBA 

RAC , ASM

Check the distribution of session on all the nodes 

 

SQL, PL/SQL , Automation

useful SQLPLUS settings

Session related sqls

Change column width of show parameter in SQL Plus

Script for Health Check of Database 

Good collection of SQLs

To put all the datafiles of the database or a tablespace in autoextend mode
Move table and dependant LOB to other tablespace
Converting Numbers to millions and more ...
Historical growth of tablespace
for the 1st time database users - How to start the database
Adding name of the table in the output from multiple tables

Performance Tuning

Explain plan for SQLs

Get Table Details
Locks and Waits

mapping tables with sequences triggers
Analyzing a Statspack Report
Schedule snapshot collection in Statspack reports
Local Indexes for Partitioning
Check maximum memory utilization for oracle Database
Identify Top CPU / Memory intensive process and map to corresponding Oracle Process/ Session
Identify Oracle Process ID and related SQL
check fragmentation of table
Identify session waiting on enq: TX - row lock contention 
Identify Sessions using an Object/ many Objects 
Detection of Deadlock errors and investigation 

History of change in parameters

Historical growth of resource limit

General

Oracle DBA Interview Questions
Oracle 11gr2 Database Reference
Configure FGA ( Fine Grain Auditing)
Favorite Oracle Metalink Notes
Renaming table: How does that affect the associated objects?
How to read Alert and Listener logs from SQLPLUS
Resize datafile and enable autoextend
Check Object Inventory & recently created objects
Life Without AWR
Stopping Oracle Services on Windows
Startup failure ORA-00845: MEMORY_TARGET not supported on this system
Check Tablespace Utilisation

Export and import of data

Weblogic

FAILED_NOT_RESTARTABLE in WebLogic Server 11g

Peformance Testing

Load testing Tools Used -Grinder
How To Measure MySQL Query Performance with mysqlslap