Click here to monitor SSC
SQLServerCentral is supported by Redgate
 
Log in  ::  Register  ::  Not logged in
 
 
 


Back to basics


Back to basics

Author
Message
Revenant
Revenant
SSCertifiable
SSCertifiable (5.8K reputation)SSCertifiable (5.8K reputation)SSCertifiable (5.8K reputation)SSCertifiable (5.8K reputation)SSCertifiable (5.8K reputation)SSCertifiable (5.8K reputation)SSCertifiable (5.8K reputation)SSCertifiable (5.8K reputation)

Group: General Forum Members
Points: 5803 Visits: 4718
Comments posted to this topic are about the item Back to basics
zymos
zymos
Mr or Mrs. 500
Mr or Mrs. 500 (542 reputation)Mr or Mrs. 500 (542 reputation)Mr or Mrs. 500 (542 reputation)Mr or Mrs. 500 (542 reputation)Mr or Mrs. 500 (542 reputation)Mr or Mrs. 500 (542 reputation)Mr or Mrs. 500 (542 reputation)Mr or Mrs. 500 (542 reputation)

Group: General Forum Members
Points: 542 Visits: 259
Great question on data types. Thanks.
Danny Ocean
Danny Ocean
Ten Centuries
Ten Centuries (1.3K reputation)Ten Centuries (1.3K reputation)Ten Centuries (1.3K reputation)Ten Centuries (1.3K reputation)Ten Centuries (1.3K reputation)Ten Centuries (1.3K reputation)Ten Centuries (1.3K reputation)Ten Centuries (1.3K reputation)

Group: General Forum Members
Points: 1348 Visits: 1549
Good question. But i never feel to use "Bitwise AND" (&) in real working scenario. It will good, if anyone come with some real working example. :-)

Thanks
Vinay Kumar
-----------------------------------------------------------------
Keep Learning - Keep Growing !!!
www.GrowWithSql.com
Koen Verbeeck
Koen Verbeeck
SSCoach
SSCoach (16K reputation)SSCoach (16K reputation)SSCoach (16K reputation)SSCoach (16K reputation)SSCoach (16K reputation)SSCoach (16K reputation)SSCoach (16K reputation)SSCoach (16K reputation)

Group: General Forum Members
Points: 16463 Visits: 13207
Nice question, thanks!



How to post forum questions.
Need an answer? No, you need a question.
What’s the deal with Excel & SSIS?

Member of LinkedIn. My blog at SQLKover.

MCSA SQL Server 2012 - MCSE Business Intelligence
Patibandla
Patibandla
Valued Member
Valued Member (60 reputation)Valued Member (60 reputation)Valued Member (60 reputation)Valued Member (60 reputation)Valued Member (60 reputation)Valued Member (60 reputation)Valued Member (60 reputation)Valued Member (60 reputation)

Group: General Forum Members
Points: 60 Visits: 178
What if i define @S as BIGINT

Can you give me a real time scenario as in this operator would be useful. i am just a bit curious as i have never used used it.
martin.whitton
martin.whitton
Ten Centuries
Ten Centuries (1.3K reputation)Ten Centuries (1.3K reputation)Ten Centuries (1.3K reputation)Ten Centuries (1.3K reputation)Ten Centuries (1.3K reputation)Ten Centuries (1.3K reputation)Ten Centuries (1.3K reputation)Ten Centuries (1.3K reputation)

Group: General Forum Members
Points: 1288 Visits: 1763
Danny Ocean (7/1/2013)
Good question. But i never feel to use "Bitwise AND" (&) in real working scenario. It will good, if anyone come with some real working example. :-)

It provides a neat way of sending multiple options as a single integer parameter.

For example, let's say you have a table called "Locations" with 2 columns, LocationID and Location, containing the following values:

LocationID Location
1 London
2 Dublin
4 Paris
8 Berlin
16 New York
etc...

Then you could select any combination of Location values as follows:

declare @Selection int;
set @Selection=10; -- (this will select Dublin and Paris, because Dublin's LocationID plus Paris's LocationID equals 10)

select
Location
from
Locations
where
LocationId & @Selection>0;


Danny Ocean
Danny Ocean
Ten Centuries
Ten Centuries (1.3K reputation)Ten Centuries (1.3K reputation)Ten Centuries (1.3K reputation)Ten Centuries (1.3K reputation)Ten Centuries (1.3K reputation)Ten Centuries (1.3K reputation)Ten Centuries (1.3K reputation)Ten Centuries (1.3K reputation)

Group: General Forum Members
Points: 1348 Visits: 1549
martin.whitton (7/2/2013)
Danny Ocean (7/1/2013)
Good question. But i never feel to use "Bitwise AND" (&) in real working scenario. It will good, if anyone come with some real working example. :-)

It provides a neat way of sending multiple options as a single integer parameter.

For example, let's say you have a table called "Locations" with 2 columns, LocationID and Location, containing the following values:

LocationID Location
1 London
2 Dublin
4 Paris
8 Berlin
16 New York
etc...

Then you could select any combination of Location values as follows:

declare @Selection int;
set @Selection=10; -- (this will select Dublin and Paris, because Dublin's LocationID plus Paris's LocationID equals 10)

select
Location
from
Locations
where
LocationId & @Selection>0;





Thanks martin :-)

Thanks
Vinay Kumar
-----------------------------------------------------------------
Keep Learning - Keep Growing !!!
www.GrowWithSql.com
Lokesh Vij
Lokesh Vij
SSCommitted
SSCommitted (1.6K reputation)SSCommitted (1.6K reputation)SSCommitted (1.6K reputation)SSCommitted (1.6K reputation)SSCommitted (1.6K reputation)SSCommitted (1.6K reputation)SSCommitted (1.6K reputation)SSCommitted (1.6K reputation)

Group: General Forum Members
Points: 1570 Visits: 1599
martin.whitton (7/2/2013)

It provides a neat way of sending multiple options as a single integer parameter.


Nice example Martin :-)

~ Lokesh Vij

Guidelines for quicker answers on T-SQL question
Guidelines for answers on Performance questions

Link to my Blog Post --> www.SQLPathy.com

Follow me @Twitter


sqldoubleg
sqldoubleg
SSC Eights!
SSC Eights! (904 reputation)SSC Eights! (904 reputation)SSC Eights! (904 reputation)SSC Eights! (904 reputation)SSC Eights! (904 reputation)SSC Eights! (904 reputation)SSC Eights! (904 reputation)SSC Eights! (904 reputation)

Group: General Forum Members
Points: 904 Visits: 1345
Danny Ocean (7/1/2013)
Good question. But i never feel to use "Bitwise AND" (&) in real working scenario. It will good, if anyone come with some real working example. :-)


Hi, another example where BIT comparison is useful, msdb..sysschedules keeps the freq_interval in bitwise value Smile


use [msdb]
go
create table #DaysOfWeekBitWise(
[bitValue] [tinyint] NOT NULL PRIMARY KEY,
[name] [varchar](10) NULL,
)
go
insert into #DaysOfWeekBitWise ([bitValue], [name])
values (1, N'Sunday')
, (2, N'Monday')
, (4, N'Tuesday')
, (8, N'Wednesday')
, (16, N'Thursday')
, (32, N'Friday')
, (64, N'Saturday')
go

select j.name
, case when j.enabled = 1 then 'Yes' else 'No' end as enabled
, jsch.next_run_date
, jsch.next_run_time
--, jst.*
, s.freq_interval
, ISNULL( STUFF( (SELECT N', ' + name FROM #DaysOfWeekBitWise AS B WHERE B.bitValue & s.freq_interval = B.bitValue FOR XML PATH('') ), 1, 2, '' ), 'None' ) AS backup_schedule
from msdb.dbo.sysjobs as j
left join msdb.dbo.sysjobschedules as jsch
on jsch.job_id = j.job_id
left join msdb.dbo.sysschedules as s
on s.schedule_id = jsch.schedule_id
order by j.name
go
drop table #DaysOfWeekBitWise
go



Cheers
Thomas Abraham
Thomas Abraham
SSCrazy
SSCrazy (2.3K reputation)SSCrazy (2.3K reputation)SSCrazy (2.3K reputation)SSCrazy (2.3K reputation)SSCrazy (2.3K reputation)SSCrazy (2.3K reputation)SSCrazy (2.3K reputation)SSCrazy (2.3K reputation)

Group: General Forum Members
Points: 2337 Visits: 2254
Patibandla (7/2/2013)
What if i define @S as BIGINT

Can you give me a real time scenario as in this operator would be useful. i am just a bit curious as i have never used used it.


The last time I saw it used in a database was similar to the city option example given. In this instance, it was used to determine permissions across multiple databases by comparing the database 'lock' (say '01001001') to the user 'key' (say '11011001'). If the bitwise AND came back the same as the database lock, then you had access to the database.

I would note the field is semantically overloaded. But, that is a different discussion.

Please don't go. The drones need you. They look up to you.
Connect to me on LinkedIn
Go


Permissions

You can't post new topics.
You can't post topic replies.
You can't post new polls.
You can't post replies to polls.
You can't edit your own topics.
You can't delete your own topics.
You can't edit other topics.
You can't delete other topics.
You can't edit your own posts.
You can't edit other posts.
You can't delete your own posts.
You can't delete other posts.
You can't post events.
You can't edit your own events.
You can't edit other events.
You can't delete your own events.
You can't delete other events.
You can't send private messages.
You can't send emails.
You can read topics.
You can't vote in polls.
You can't upload attachments.
You can download attachments.
You can't post HTML code.
You can't edit HTML code.
You can't post IFCode.
You can't post JavaScript.
You can post emoticons.
You can't post or upload images.

Select a forum

































































































































































SQLServerCentral


Search