In the final part of this instalment I want to focus on the possible optimisation of remote access that I outlined in the initial part, which is based on the idea of running multiple concurrent remote branches of a UNION ALL to overcome the query coordinator bottleneck of straightforward remote queries that need to transfer larger amounts of data.For that purpose I now simply change my sample query to access the serial table T2 via the DB link defined in the setup of the initial pa
Since I started a new job I also wanted to try out MacBook as my new laptop. I've never been a Mac user, but there seems to be a large group of people who think Macs are the best, so I needed to find out the goodness of Macs myself :) A quick tip: Don't upgrade to Yosemite if you laptop is bound to Active Directory.
It’s official, England are now the second best cricket team in the British Isles !
After all, Scotland were dispatched with ease and as for Wales…they didn’t even make it to the Cricket World Cup.
OK, technically they did because they’re part of England for the purposes of cricket…although you’d be hard pressed to get them to admit it.
Ireland are, of course, some way in front having actually managed to actually win the odd game against Test Playing Nations.
Since some time I have been adding
WHERE 1=1 to all my queries.
I get queries like this:
SELECT * FROM emp e WHERE 1=1 AND e.ename LIKE 'A%' AND e.deptno = 20
Lots of people ask me what’s the use of this
You know I like to type as little as possible but here I am typing a lot of extra characters. And yet, it makes my development life a lot easier.
SQL> SQL> SQL> 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 job finished DECLARE*ERROR at line 1:ORA-23616: Failure in executing block 7 for script13F5CD569383406C82E7F63EE3F927E0 withORA-44001: invalid schemaORA-06512: at "SYS.DBMS_RECO_SCRIPT_INVOK", line 139ORA-06512: at "SYS.DBMS_STREAMS_RPC", line 465ORA-06512: at "SYS.DBMS_RECOVERABLE_SCRIPT", line 659ORA-06512: at "SYS.DBMS_RECOVERABLE_SCRIPT", line 682
I recently came across the book called “Oracle Database Transactions and Locking Revealed” by Tom Kyte and Darl Kuhn. Usually, any new book by Tom Kyte is a big deal and acquires a huge following very quickly. Strangely enough there was only a single review on the Amazon, before I added my own.
For those who don’t know, it is now possible to use hints on PgSQL. Here
is how things work:
- Download and install the extension from the home page:
If you are using Red Hat derivative, like me, it’s a simple RPM package. Check the content of the package, like this:
[mgogala@pg91 ~]$ rpm -qa|grep pg_hint
I found an old copy of the Oracle 9i User-Managed Backup and Recovery Guide and read the following:
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Hope this is the right place to post this question. I recently joined a program that prepares students to become DBA's. Its a six month program, roughly. It's every weekend sat-sun, 4-7 P.M. I wanted to attach our course schedule and get some feedback from you guys to see if the topics covered in this course would prepare me for an actual job. Thanks!
Here is our course outline:
Oracle DBA Training - Schedule for Batch-29
Week Day Date Topics Notes
UNIX Basics Training starts from here