Database trends survey (Embarcadero)

Marco Cantu posted in his blog:

…While most of the questions are on the choice and number of servers used (MS SQL Server being the most widely adopted, Oracle the most critical, and Firebird has a significant 4% 5.5% presence for large companies). Other questions are tuned for Embarcadero products (like evaluating the need for automating some DBA tasks). A few questions are interesting for their broad perspective, like those focused on the relationship between developers and DBAs…

Btw, interesting that there is no mention of Embarcadero’s Interbase in the survey results.

Learning from bugs using together : list,distinct,case,extract weekday

Seems that the bug CORE-3302 is triggered when there are millions of rows and only in firebird 2.5 and 3.0 (Bug is already fixed in svn)
What you can learn from the bug is the usage of list,distinct,case,extract weekday in the same query

First i have created the query to extract the day in string format from current date
select
list(case extract(weekday from CURRENT_DATE) when 0 then 'Sun' when 1 then 'Mon' when 2 then 'Tue' when 3 then 'Wed' when 4 then 'Thu' when 5 then 'Fri' when 6 then 'Sat' end)
from RDB$DATABASE

In my case the result was Fri.
Then you can create a table with different dates:

CREATE table tasks
(
DATE_OF_TASK DATE
);

Populate the table

INSERT INTO TASKS (DATE_OF_TASK) VALUES ('2011-01-07');
INSERT INTO TASKS (DATE_OF_TASK) VALUES ('2011-01-07');
INSERT INTO TASKS (DATE_OF_TASK) VALUES ('2011-01-07');
INSERT INTO TASKS (DATE_OF_TASK) VALUES ('2011-01-06');
INSERT INTO TASKS (DATE_OF_TASK) VALUES ('2011-01-06');
INSERT INTO TASKS (DATE_OF_TASK) VALUES ('2011-01-06');
INSERT INTO TASKS (DATE_OF_TASK) VALUES ('2011-01-08');
INSERT INTO TASKS (DATE_OF_TASK) VALUES ('2011-01-08');
INSERT INTO TASKS (DATE_OF_TASK) VALUES ('2011-01-08');

Then start to run the query

select
list(distinct case extract(weekday from date_of_task) when 0 then 'Sun' when 1 then 'Mon' when 2 then 'Tue' when 3 then 'Wed' when 4 then 'Thu' when 5 then 'Fri' when 6 then 'Sat' end)
from tasks

Result should be:

Fri,Sat,Thu

Testing boolean columns in Firebird 3.0

After the new year eve i wanted to test the new boolean columns in the new build that added them for firebird 3.0 , so i have created the columns and then inserted some random bool vaules for test after that i have started to test the bool expressions (and , or  …) in a select from the new bool values.

ps: the select worked in isql-fb only , in flamerobin the datatype is not implemented yet (default from ubuntu 0.9.2)

Firebird SQL linkedin Community is now an open group

I am pleased to announce that, as the owner of this group, I have just switched us to an open discussion group. All future discussions will be fully visible, searchable, and shareable on the Web. All past discussions are now closed in a members-only archive. I look forward to our future discussions now joining the broader conversation of the wider Web.

Posted By Dumitru Condrea
Go to the complete announcement
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