to execute the procedure.
When executing the Procedure in the process list I am getting 3 states like
'Sending data', 'Sorting Result' and 'Sending data' again.
Then I created one view by using the base table and updated the procedure by
replacing that view in the place of a base table, it took
I think you're reducing the amount of rows referenced throughout the proc
using the view. This might be where you're seeing a performance difference.
If you create an innodb table where the structure and row count match the
view maybe you'll see another difference? I'll wait for Rick James' input
in the table. But it's taking more than 15 Minutes to execute the procedure.
When executing the Procedure in the process list I am getting 3 states like
'Sending data', 'Sorting Result' and 'Sending data' again.
Then I created one view by using the base table and updated the procedure by
replacing
'reports', consider
Summary Tables. Non-trivial, but the 'minutes' will become 'seconds'.
-Original Message-
From: Bruce Ferrell [mailto:bferr...@baywinds.org]
Sent: Tuesday, July 30, 2013 7:08 AM
To: mysql@lists.mysql.com
Subject: Re: Performance Improvements with VIEW
On 07/30
2012/09/17 13:11 -0500, Peter Brawley
Looks like a bug. Report it?
It was reported:
Bug #45346 VIEW containing INTERVAL(...) can be created but does not work
Submitted: 5 Jun 2009 10:00 Modified: 5 Jun 2009 10:16
Severity:S3 (Non-critical)
Version:6.0, 5.4, 5.1 OS:Any
Seems it arouses
My MySQL is of version 5.5.8-log. I find I cannot save a query with INTERVAL in
a view: redundant round brackets are added. If the query is
SELECT INTERVAL(1, 2, 3, 4)
within the frm file there is the expression
interval((1, 2, 3, 4))
which is wrong.
What is known about this?
--
MySQL
n 2012-09-17 12:58 PM, h...@tbbs.net wrote:
My MySQL is of version 5.5.8-log. I find I cannot save a query with INTERVAL in
a view: redundant round brackets are added. If the query is
SELECT INTERVAL(1, 2, 3, 4)
within the frm file there is the expression
interval((1, 2, 3, 4))
which
in view
n 2012-09-17 12:58 PM, h...@tbbs.net wrote:
My MySQL is of version 5.5.8-log. I find I cannot save a query with
INTERVAL in a view: redundant round brackets are added. If the query is
SELECT INTERVAL(1, 2, 3, 4)
within the frm file there is the expression
interval((1, 2, 3, 4
-Original Message-
From: Rick James [mailto:rja...@yahoo-inc.com]
Sent: September 17, 2012 3:04 PM
To: peter.braw...@earthlink.net; mysql@lists.mysql.com
Subject: RE: function INTERVAL in view
INTERVAL is a keyword. This is probably the root of the hiccup.
Is that your Stored
2012/09/10 15:49 -0700, Rick James
SELECT ... ORDER BY .. GROUP BY..
is syntactically incorrect.
Yeap, my mistake.
( SELECT ... ORDER BY .. ) GROUP BY ..
Is what I call the group by trick. It is an optimal way to SELECT all the
fields corresponding to the MAX (or MIN) of one of the fields.
. MariaDB decides that this construct can
be optimized, and messes up the 'trick'.
-Original Message-
From: Mark Haney [mailto:ma...@abemblem.com]
Sent: Friday, September 07, 2012 6:12 AM
To: mysql@lists.mysql.com
Subject: Re: Create a VIEW with nested SQL
On 09/06/2012 10:23 AM, h
, MySQL balks at saving a view with a query for a table. One has to make
them separate views.
Now that's a syntax I've never seen before. Then again, I haven't done
any serious SQL in about 5 years, so I shouldn't be surprised. If I
read your question correctly about mach_id, the mach_id
at saving a view with a query for a table. One has to make
them separate views.
The problem I encountered is that I can't find a way to just pull the
most recent records for each machine without the GROUP BY statement.
That's all I need.
Okay, so here's what I tried. I created a view
...@abemblem.com]
Sent: Thursday, September 06, 2012 5:51 AM
To: mysql@lists.mysql.com
Subject: Create a VIEW with nested SQL
I have a bit of a performance/best practice question for those in the
know. I have a nested SQL statement that selects fields from a SELECT
that has a JOIN in it. Here's the SQL
table is owed
a primary key), or maybe to reverse the three tables (call ll a virtual
table).
If you really want to make a view out of it, under MySQL it can be only two
views, not one.
(I extensivly use views, but my tables are not big, and the traffic on them is
very little, about ten
(read only) every 5 seconds or so to display
status lights from machines.
My thought was to make this a VIEW to see if that made a difference in
speed, but when I went to create it mySQL choked with an error about the
VIEW being built from a SELECT inside the SELECT. I googled a couple of
answers
with GROUP BY outside it, unless mach_id is unique in both tables--I
have found that GROUP BY not always orders the output, when everything is
unique.
And yes, MySQL balks at saving a view with a query for a table. One has to make
them separate views.
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For list archives
I am working on a view based on this query:
===
SELECT
-- Patient Info
p.IdPatient,
p.IdLastword MRN,
p.NameLast,
p.NameFirst,
p.Addr1,
p.Addr2,
p.AddrCity,
p.AddrState,
p.AddrZip,
p.Gender,
p.DateOfBirth,
-- Provider Info
af.IdAffil,
af.PractName
responsabilité
pour le contenu fourni.
From: j...@newcenturydata.com
Subject: view query is slow
Date: Thu, 23 Aug 2012 11:30:17 -0700
To: mysql@lists.mysql.com
I am working on a view based on this query:
===
SELECT
-- Patient Info
p.IdPatient,
p.IdLastword
On 8/23/2012 2:30 PM, James W. McNeely wrote:
I am working on a view based on this query:
===
SELECT
-- Patient Info
p.IdPatient,
p.IdLastword MRN,
p.NameLast,
p.NameFirst,
p.Addr1,
p.Addr2,
p.AddrCity,
p.AddrState,
p.AddrZip,
p.Gender,
p.DateOfBirth
VIEW)
We might have more comments/suggestions.
-Original Message-
From: James W. McNeely [mailto:j...@newcenturydata.com]
Sent: Thursday, August 23, 2012 11:30 AM
To: mysql@lists.mysql.com
Subject: view query is slow
I am working on a view based on this query
On Thu, Aug 23, 2012 at 11:30:17AM -0700, James W. McNeely wrote:
I am working on a view based on this query:
===
SELECT
-- Patient Info
p.IdPatient,
p.IdLastword MRN,
p.NameLast,
p.NameFirst,
p.Addr1,
p.Addr2,
p.AddrCity,
p.AddrState
Thanks for the responses to everyone! Here is the result for the explains.
view query=
explain select * from admin_exam_view where dateexam = '2012-08-13
. Étant donné que les email
peuvent facilement être sujets à la manipulation, nous ne pouvons accepter
aucune responsabilité pour le contenu fourni.
From: j...@newcenturydata.com
Subject: view query is slow
Date: Thu, 23 Aug 2012 11:30:17 -0700
To: mysql@lists.mysql.com
I am working
I think I'll just make a nightly process run that drops and then recreates the
table, unless someone has a workable idea of how to make this view query-able.
Thanks!
Jim McNeely
On Aug 23, 2012, at 2:06 PM, James W. McNeely wrote:
This didn't help, but good try!
Jim McNeely
On Aug 23
To endow CREATE VIEW with COMMENT would be splendid.
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; 2011/10/20 10:21 -0400, Shawn Green (MySQL)
On 10/19/2011 17:50, wrote:
I made this query a view, called MEMBERP, no problem:
...snip...
Only GivenName is derived from GROUP_CONCAT and is also a lesser field for
ordering by. Why is that a problem?
Perhaps it is the USING clause
Hello Hal�sz S�ndor,
On 10/19/2011 17:50, wrote:
I made this query a view, called MEMBERP, no problem:
SELECT MemberID, ereStart, DateModified, MembershipExpires, MemberSince,
Category, Boardster, GROUP_CONCAT(DISTINCT Salutation ORDER BY Rank) AS
Salutation, GROUP_CONCAT(DISTINCT GivenName
I made this query a view, called MEMBERP, no problem:
SELECT MemberID, ereStart, DateModified, MembershipExpires, MemberSince,
Category, Boardster, GROUP_CONCAT(DISTINCT Salutation ORDER BY Rank) AS
Salutation, GROUP_CONCAT(DISTINCT GivenName ORDER BY Rank) AS GivenName,
GROUP_CONCAT(DISTINCT
Hi,
Is it possible to hide the VIEW definitions from query browser ? Or any
other solution to hide the views ? Because I have used views for
report purpose; where I have used AES_DECRIPT() function or decipher. When view
is visible, this function and KEY also visible. I want to disable
Dear all,
I want to know how much time did it take to run a sample query.
In postgresql, we enable timing by \timing command.
Is there is any way to enable in Mysql
Thanks
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Usually, at the end of the query running it displays the time how much it
took.
Or else enable the profiling and run the query to check the exact time it
took for execution at all levels.
On Mon, Aug 1, 2011 at 12:11 PM, Adarsh Sharma adarsh.sha...@orkash.comwrote:
Dear all,
I want to know
you can also use EXPLAIN, which will give you much more details.
http://dev.mysql.com/doc/refman/5.5/en/execution-plan-information.html
http://www.techiequest.com/mysql-visual-explain-hierarchical-view-of-query-execution-plan/
On Sun, Jul 31, 2011 at 11:45 PM, Suresh Kuna sureshkumar
, which will give you much more details.
http://dev.mysql.com/doc/refman/5.5/en/execution-plan-information.html
http://www.techiequest.com/mysql-visual-explain-hierarchical-view-of-query-execution-plan/
On Sun, Jul 31, 2011 at 11:45 PM, Suresh Kuna sureshkumar...@gmail.com
wrote:
Usually
2011/04/25 18:45 +, Larry McGhaw
CREATE VIEW `myview2` AS
SELECT a.*, IF(b.`Name` IS NULL, '', b.`Name`) AS `TypeName`
FROM `mytable` a
LEFT JOIN `types` b ON a.`Type` = b.`ID`;
Well, for this construct
IF(b.`Name` IS NULL, '', b.`Name`)
there is a special function
On 04/26/11 05:32, Halász Sándor wrote:
2011/04/25 18:45 +, Larry McGhaw
CREATE VIEW `myview2` AS
SELECT a.*, IF(b.`Name` IS NULL, '', b.`Name`) AS `TypeName`
FROM `mytable` a
LEFT JOIN `types` b ON a.`Type` = b.`ID`;
Well, for this construct
IF(b.`Name` IS NULL
Hello Daniel,
My best advice is to not use a custom MySQL function in a view when the
parameter to that function
is a column or expression that has the potential to result in NULL because of
being on the right side
of a left outer join (or the left side of a right outer join
Hi,
On 04/25/11 20:45, Larry McGhaw wrote:
My best advice is to not use a custom MySQL function in a view when the
parameter to that function
is a column or expression that has the potential to result in NULL because of
being on the right side
of a left outer join (or the left side of a right
-
From: Daniel Kraft [mailto:d...@domob.eu]
Sent: Friday, April 22, 2011 1:05 PM
To: Daevid Vincent
Cc: mysql@lists.mysql.com
Subject: Re: WHERE does not work on calculated view field - Found word(s) list
error in the Text body
Hi,
thanks for the fast reply!
On 04/22/11 21:39, Daevid Vincent
Hi Daniel,
Could you check the 'myview' once again? I think you thought to create the
view as follows:
CREATE VIEW `myview2` AS SELECT a.*, EMPTY_STRING(b.`Name`) AS
`TypeName`FROM `mytable` a LEFT JOIN `types` b ON *a.ID* *= b.`ID`*;
Now your select queries will give results
Hi,
thanks for the answer!
On 04/23/11 11:33, ars k wrote:
Could you check the 'myview' once again? I think you thought to create the
view as follows:
CREATE VIEW `myview2` AS SELECT a.*, EMPTY_STRING(b.`Name`) AS
`TypeName`FROM `mytable` a LEFT JOIN `types` b ON *a.ID* *= b.`ID
IF(value IS NULL, '', value);
END|
DELIMITER ;
CREATE VIEW `myview` AS
SELECT a.*, EMPTY_STRING(b.`Name`) AS `TypeName`
FROM `mytable` a
LEFT JOIN `types` b ON a.`Type` = b.`ID`;
SELECT COUNT(*) FROM `myview` WHERE `TypeName` IS NULL;
SELECT COUNT(*) FROM `myview` WHERE `TypeName
-Original Message-
From: Daniel Kraft [mailto:d...@domob.eu]
Sent: Friday, April 22, 2011 12:37 PM
To: mysql@lists.mysql.com
Subject: WHERE does not work on calculated view field
Hi all,
I'm by no means a (My)SQL expert and just getting started working with
VIEWs and stored
`types`
(`ID` SERIAL,
`Name` TEXT NOT NULL,
PRIMARY KEY (`ID`));
INSERT INTO `types` (`Name`) VALUES ('Type A'), ('Type B');
DELIMITER |
CREATE FUNCTION `EMPTY_STRING` (value TEXT)
RETURNS TEXT
DETERMINISTIC
BEGIN
RETURN IF(value IS NULL, '', value);
END|
DELIMITER ;
CREATE VIEW
DETERMINISTIC
BEGIN
RETURN IF(value IS NULL, '', value);
END|
DELIMITER ;
CREATE VIEW `myview` AS
SELECT a.*, EMPTY_STRING(b.`Name`) AS `TypeName`
FROM `mytable` a
LEFT JOIN `types` b ON a.`Type` = b.`ID`;
SELECT COUNT(*) FROM `myview` WHERE `TypeName` IS NULL;
SELECT COUNT(*) FROM `myview` WHERE
);
CREATE TABLE `types`
(`ID` SERIAL,
`Name` TEXT NOT NULL,
PRIMARY KEY (`ID`));
INSERT INTO `types` (`Name`) VALUES ('Type A'), ('Type B');
DELIMITER |
CREATE FUNCTION `EMPTY_STRING` (value TEXT)
RETURNS TEXT
DETERMINISTIC
BEGIN
RETURN IF(value IS NULL, '', value);
END|
DELIMITER ;
CREATE VIEW `myview
@lists.mysql.com
Subject: Re: WHERE does not work on calculated view field - Found word(s) list
error in the Text body
Hi,
thanks for the fast reply!
On 04/22/11 21:39, Daevid Vincent wrote:
DROP DATABASE `test`;
CREATE DATABASE `test`;
USE `test`;
CREATE TABLE `mytable`
(`ID` SERIAL,
`Type
On 22.04.2011 22:41, Larry McGhaw wrote:
It does appear to be some type of bug to me.
I agree. I was thrown by Daniels first and third comment, which I
guess should read second and third
I reproduced the behavior in 5.1.53-community on Windows.
/ Carsten
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MySQL General Mailing List
For
table to work from
- result sets derived from parametric queries
- mysql views cannot work from temporary tables so I have to drop a
view+select/where approach.
- functions cannot return result sets
- procedures can do everything but I found no way to handle the result
set within mysql (officially
are:
- temporary table to work from
- result sets derived from parametric queries
- mysql views cannot work from temporary tables so I have to drop a
view+select/where approach.
- functions cannot return result sets
- procedures can do everything but I found no way to handle the result set
within
- mysql views cannot work from temporary tables so I have to drop a
view+select/where approach.
- functions cannot return result sets
- procedures can do everything but I found no way to handle the result
set within mysql (officially not supported)
Any ideas how to solve this?
Thanks in advance
Bgs
table to work from
- result sets derived from parametric queries
- mysql views cannot work from temporary tables so I have to drop a
view+select/where approach.
- functions cannot return result sets
- procedures can do everything but I found no way to handle the result set
within mysql (officially
initial setup and needs are:
- temporary table to work from
- result sets derived from parametric queries
- mysql views cannot work from temporary tables so I have to drop a
view+select/where approach.
- functions cannot return result sets
- procedures can do everything but I found no way
Hello,
I would like to have an updatable view that only shows the records in a
table that have been created by the current user. By restricting regular
users to this view (rather than the underlying table) they could only look
at and modify their own data; more privileged users could look
On Wed, Apr 7, 2010 at 11:45 PM, shamu...@gmail.com shamu...@gmail.comwrote:
Below is my MySQL Server's status and configuration. But I can not see
anything under /tmpfs/, it is showing empty to me.
here is the result of ls -al
drwxrwxrwx 2 mysql mysql60 Apr 7 17:43 tmpfs
Could
Below is my MySQL Server's status and configuration. But I can not see
anything under /tmpfs/, it is showing empty to me.
here is the result of ls -al
drwxrwxrwx 2 mysql mysql60 Apr 7 17:43 tmpfs
Could anyone tell me how to check the status of temp files and temp tables
on disk?
Thanks.
Hi Guys,
Which command can allow me view all accounts in a Mysql database
In the mysql prompt, execute the below
use mysql ; select user from user ;
will show all the accounts in a MySQL database.
On Fri, Feb 5, 2010 at 5:27 PM, ishaq gbola ishaq...@yahoo.co.uk wrote:
Hi Guys,
Which command can allow me view all accounts in a Mysql database
--
Thanks
Login to mysql with the command
mysql -uroot -px -A
use the database mysql
mysql \u mysql
View the table name user
mysql show tables;
To view the user
mysql select user from user;
On 5 February 2010 17:45, Suresh Kuna sureshkumar...@gmail.com wrote:
In the mysql prompt, execute
Hi!
Use mysql client:
mysql *SELECT `user`, `host` FROM `mysql`.`user` LIMIT 0, 5;*
2010/2/5 ishaq gbola ishaq...@yahoo.co.uk:
Hi Guys,
Which command can allow me view all accounts in a Mysql database
--
Best regards,
Eugene Kilimchuk ekilimc...@gmail.com
On 2/5/2010 5:15 AM, Suresh Kuna wrote:
In the mysql prompt, execute the below
use mysql ; select user from user ;
will show all the accounts in a MySQL database.
Alternatively, you can use myphpadmin. I guess it all depends upon what
you need the information for and to what purpose.
Hello,
I need to convert a non-materialized MySQL view to
a MySQL table. Are there any tools to do that?
Thanks,
Jacek
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At 04:55 PM 1/14/2010, Jacek Becla wrote:
Hello,
I need to convert a non-materialized MySQL view to
a MySQL table. Are there any tools to do that?
Thanks,
Jacek
Jacek,
Can't you just do a:
create table mytable select * from myview;
???
Mike
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MySQL General Mailing List
For list
Hello:
I have a database with over 60 tables with thousands
to millions or rows in each.
I want to develop a summary of the data joined across
all the tables.
I can do this with a view, but I am concerned it will
take a lot of resources to perform all the joins required
by the view. Is a view
A view is no more or less efficient that the queries that make it up. Each
time you invoke the view, you repeat all the joins.
A join could be more efficient only if you go to a lot of effort to ensure
it forms the most efficient join(s) of the underlying tables.
Your solution of the summary
Jim:
A view is no more or less efficient that the queries that
make it up. Each
time you invoke the view, you repeat all the joins.
That is what I was afraid of. With the large number
of tables I have, the joins are going to take a lot
of cycles to run.
Your solution of the summary table
Hi
I have created the following 2 views:
CREATE VIEW `cpes_noise_num` AS
SELECT cpes_dsl_line_stats.id_cpes,
sum(IF(cpes_dsl_line_stats.snr_downstream
(SELECT snr_downstream FROM admin_configs WHERE admin_id =0),1,0)) AS
snr_downstream, sum(IF((cpes_dsl_line_stats.bit_errors
In the last episode (Jun 10), Yariv Omer said:
I have created the following 2 views:
CREATE VIEW `cpes_noise_num` AS
[ big view]
CREATE VIEW `my_connect` AS
[ big view joining on cpes_noise_num ]
when I am trying to do something like:
SELECT count(*) from my_connect
It takes 1 minute
I have a view which is a 3 table join on a compound index.
I have two indexes: Index1: Product_Code, Store_Id, Date_Sold and
Index2:
Date_Sold,Store_Id,Product_Code
If I execute a select like:
select * from MyView where product_code=123;
it returns
Hello,
After a system host name had changed, my organization updated the MySQL user
records, changing the old (and now non-existent) host name to the new one.
This caused any views that were created by users accessing the MtSQL server
from the old host to become invalid as the view's
Ingo,
On Wed, Mar 4, 2009 at 8:49 AM, Ingo Weiss i...@metaversum.com wrote:
Hi all,
I have a view that is joining two base tables. I can update through
the view, but insert only through the base tables. Now I am having the
problem that seems to boil down to the following: When I insert
Hi all,
I have a view that is joining two base tables. I can update through
the view, but insert only through the base tables. Now I am having the
problem that seems to boil down to the following: When I insert into
the base tables inside a transaction, the view doesn't seem to update.
Only
On Mon, Feb 9, 2009 at 3:41 PM, Steven Buehler wrote:
Ok, I just saw a post about using view's in mysql. I tried to look it up
and found how to use it, but my question is: what is a view and why would
you use it?
The problem with any definition of an object in a database
-Original Message-
From: Jochem van Dieten [mailto:joch...@gmail.com]
Sent: Tuesday, February 10, 2009 5:10 AM
To: mysql@lists.mysql.com
Subject: Re: MySQL View
On Mon, Feb 9, 2009 at 3:41 PM, Steven Buehler wrote:
Ok, I just saw a post about using view's in mysql. I tried
On Tue, Feb 10, 2009 at 1:47 PM, Steven Buehler wrote:
From: Jochem van Dieten:
What the database will do for you behind the scenes is expand your
usage of the view. In effect, the database will replace x with its
definition. So your query SELECT a FROM x; gets expanded to:
SELECT a FROM
Hi
I am able to create an updatable view using a subquery in MySQL 5.1.29
mysql CREATE VIEW v_aa AS
- SELECT *
- FROM flight AS f
- WHERE f.RouteID IN
- (SELECT r.RouteID
- FROM route AS r
- WHERE r.To=
- (SELECT a.AirportID
- FROM
Hi!
On Mon, Feb 9, 2009 at 7:17 AM, blue.trapez...@gmail.com wrote:
Hi
I am able to create an updatable view using a subquery in MySQL 5.1.29
mysql CREATE VIEW v_aa AS
- SELECT *
- FROM flight AS f
- WHERE f.RouteID IN
- (SELECT r.RouteID
- FROM route AS r
Ok, I just saw a post about using view's in mysql. I tried to look it up
and found how to use it, but my question is: what is a view and why would
you use it? Is it like a temporary table? Does it write a new database to
the disk or use memory?
Thanks
Steve
On Mon, Feb 9, 2009 at 9:41 AM, Steven Buehler st...@ibushost.com wrote:
Ok, I just saw a post about using view's in mysql. I tried to look it up
and found how to use it, but my question is: what is a view and why would
you use it? Is it like a temporary table? Does it write a new database
-Original Message-
From: baron.schwa...@gmail.com [mailto:baron.schwa...@gmail.com] On
Behalf Of Baron Schwartz
Sent: Monday, February 09, 2009 9:19 AM
To: Steven Buehler
Cc: mysql@lists.mysql.com
Subject: Re: MySQL View
On Mon, Feb 9, 2009 at 9:41 AM, Steven Buehler st
On Mon, Feb 9, 2009 at 1:17 PM, blue.trapez...@gmail.com wrote:
mysql CREATE VIEW v_aa AS
- SELECT *
- FROM flight AS f
- WHERE f.RouteID IN
- (SELECT r.RouteID
- FROM route AS r
- WHERE r.To=
- (SELECT a.AirportID
- FROM airport
Subject: RE: MySQL View
Date: Mon, 9 Feb 2009 10:10:45 -0600
-Original Message-
From: baron.schwa...@gmail.com [mailto:baron.schwa...@gmail.com] On
Behalf Of Baron Schwartz
Sent: Monday, February 09, 2009 9:19 AM
To: Steven Buehler
Cc: mysql@lists.mysql.com
Subject: Re
I just found something else out and did a test. So a view is a table in a
database that can be shared. The example I found was if you have multiple
people that need a database for something, but it still has to keep the
information separate, instead of having multiple databases, you can create
Your subquery is not in the select list, it is in the where. A
subquery in the select list would be:
CREATE VIEW v_aa AS
SELECT
*
, (SELECT MAX(x) FROM y) AS z
FROM flight
This is not updatable because there is no sensible way to propagate
changes to the y base table.
Great catch
humble opinion.
Please let me know what you think
Claudio
2009/2/9 Steven Buehler st...@ibushost.com
I just found something else out and did a test. So a view is a table in a
database that can be shared. The example I found was if you have multiple
people that need a database
From: Claudio Nanni [mailto:claudio.na...@gmail.com]
Sent: Monday, February 09, 2009 3:59 PM
To: Steven Buehler
Cc: mysql@lists.mysql.com
Subject: Re: MySQL View
Steven,
I would suggest you the reading of a basic book about SQL and Databases, I
explain you why.
Views are a very fundamental
I have a VIEW that is defined over two base tables. One table is subtype
of another table and it's the VIEW that connects them. Now when I want to
insert into a subtable I have to insert through the VIEW. However I am
getting an error message when I try to insert into a VIEW. I found the
solution
generally no as join conditions do not guarantee
1)the column to be inserted is unique
2)the column is updatable
//Create a View based on 2 tables joined on location+id
CREATE VIEW locations_view AS
SELECT d.department_id, d.department_name, l.location_id, l.city
FROM departments d
Hey guys,
I am trying to construct a specially crafted view for the powerdns
DNS-Server.
This is what I have so far:
CREATE VIEW test4 AS SELECT nummer AS name, ip as content FROM
jabix.spaces JOIN jabix.ves ON spaces.veid = ves.id;
++---+
| name | content
You can add a column to a view like this:
CREATE VIEW test4 AS SELECT nummer AS name, ip as content, 1 as domain_id
FROM jabix.spaces JOIN jabix.ves ON spaces.veid = ves.id;
This will set the domain_id vaulues to 1
Olaf
On 10/14/08 8:18 AM, Samuel Vogel [EMAIL PROTECTED] wrote:
Hey guys
Hey guys,
I am trying to construct a specially crafted view for the powerdns
DNS-Server.
This is what I have so far:
CREATE VIEW test4 AS SELECT nummer AS name, ip as content FROM
jabix.spaces JOIN jabix.ves ON spaces.veid = ves.id;
Wouldn't this work?
CREATE VIEW test4 (name, content
This is exactly what I tried to avoid by using a view. I do not want to have
to take care about synchronizing two tables.
Is there any way to avoid this?
Regards,
Samy
Hi Samuel,
I am not sure if you can add a new column to a view, but why dont u create a
new table test4 as
create table test4 AS SELECT nummer AS name, ip as content FROM jabix.spaces
JOIN jabix.ves ON spaces.veid = ves.id;
And then add the new column to test4. When ever any new data is added
should probably be records with a column indicating what
type of data it is.
Brent Baisley
On Sep 4, 2008, at 5:11 AM, drflxms wrote:
Dear MySQL specialists,
this is a MySQL-newbie question: I want to create a view of a table,
where all NULL-values are substituted by 0. Therefore I tried
Dear MySQL specialists,
this is a MySQL-newbie question: I want to create a view of a table,
where all NULL-values are substituted by 0. Therefore I tried:
SELECT *,
IFNULL(*,0)
FROM table
Unfortunately IFNULL seems not to accept any wildcards like * as
placeholder for the column-name. REGEXP
Hi
I have a testview defined as
mysql create table testview (a int);
Query OK, 0 rows affected (0.01 sec)
mysql create view view_of_testview as (select * from testview);
Query OK, 0 rows affected (0.00 sec)
I create a dump of this view definition with
mysqldump --tab=/tmp test
Aaron,
why doesn't this work? the select works perfectly
Define doesn't work? What is the error message?
create view cost_report as
SELECT c_name, d_manuf as Manufacturer, d_model as Model, count(1) as
Number Enrolled,
d_price as Monthly Price, count(1)*d_price as Cost
FROM `b_devices
why doesn't this work? the select works perfectly
create view cost_report as
SELECT c_name, d_manuf as Manufacturer, d_model as Model, count(1) as
Number Enrolled,
d_price as Monthly Price, count(1)*d_price as Cost
FROM `b_devices` A
left join b_device_types B
on A.d_id = B.d_id
left join
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