Learn Joins
May 15, 2006anyone know any site that can provide "EASY" to understand examples about joins?
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Joins On Views That Are Formed With Outer Joins
Nov 3, 2000We find that a delete command on a table where the rows to be deleted involve an inner join between the table and a view formed with an outer join sometimes works, sometimes gives error 625.
If the delete is recoded to use the join key word instead of the = sign
then it alway gives error 4425.
625 21 0 Could not retrieve row from logical page %S_PGID by RID because the entry in the offset table (%d) for that RID (%d) is less than or equal to 0. 1033
4425 16 0 Cannot specify outer join operators in a query containing joined tables. View '%.*ls' contains outer join operators.
The delete with a correleted sub query instead of a join works.
Error 4425 text would imply that joins with view formed by outer joins should be avoided.
Any ideas on the principles involved here.
Old Asp Pro Trying To Learn Asp.net... Having Some Problems, Help!
Jan 31, 2005Hello everyone! Many thanks in advance for taking the time to help me out. I’ll also apologize upfront for the longwinded email, but I seem to be really stuck in a rut. I've been writing web apps for 3+ years in ASP and am finally taking the leap into ASP.net (a bit behind the curve, i know). I have a few books and have gone over the tutorials on this site. I am realizing that the syntax (if using VB) is much the same, but also realize how much richer asp.net is in comparison to traditional ASP.
I'm having some major issues in my learning process that stem from using the tutorials and attempting to be efficient with VS2003. I feel as though I’m missing something fundamental that could be causing my problems. My area of focus right now is data access, using connections, adapters and datasets.
The tutorials on this site show all of the examples by hardcoding the data access into the ASPX page. The tutorials have me importing the proper namespaces for data and sqldata access at the top of the page. This seems to work fine and dandy if I were to be coding my pages from a standard text editor, but I would like to use the richness of the VB.NET studio gui to expedite my work.
My first problem lies if I try to manually code the data access in the private class defined for the page in the codebehind section. Because it will not allow me to import multiple namespaces, the only way I get it to work would be to include the complete namespace for the object I’m trying to use (ie: system.data.sqlclient.sqconnection). On top of this, the datasets I define aren’t available as options when I try to bind them to objects in the GUI.
On the flip side, I tried to use the SQLconnection, Dataadapter, etc objects in the gui, but I can’t seem to find where the code is dynamically written for these, nor how I can, for example make this sort of connection use an application-variable level connection string. The only way I can see to make this would be to define the connection for each web form, which seems silly when I’m trying to deploy each solution multiple times with different databases.
I apologize for my ignorance, as this is probably fairly simple to overcome. If someone could point out what I’m doing wrong, or point me in the right direction, I’d be very appreciative. I am sick of spinning my wheels with this, and keep getting tempted to go back to using traditional ASP, just so I can get my job done.
Thanks again,
Tbldev
How To Learn Forumlas
Nov 23, 2005does anyone know where I can learn how to make forumlas to use in my table fields?
I have two mauals on SQL Server and niether of them cover formulas.
Thanks,
token
Where To Learn Basic SQL
Jun 12, 2007I was just looking for opinions on the best place to pick up SQL skills. Community college course? Online courses? Grad school? I've finished undergrad, if that helps anyone have an idea of my current situation.
View 4 Replies View RelatedWould Like To Learn Sql Server
Dec 13, 2007hi,
I am new to sql server. I would like to learn sql server. I have knowledge of databases. Can anyone guide me on this?
How To Learn Sql From Beginning?
Jul 23, 2005How to learn sql from beginning?I would like to learn sql but don't have a clue.can you help me?where would I start?
View 1 Replies View RelatedJust Starting To Learn It . . .
Aug 22, 2005I can't get a script to run that's supposed to generate a QueryParameters dialogue to take inputs and then run the query - forexample, the following.. . .and fl.flow_name = [[TRUE][FLOW NAME][@?]].. . .generates SQL Query Analyzer exceptions about "Incorrect syntax near'FLOW NAME'.Suggestions?
View 1 Replies View RelatedLearn SSIS
Aug 2, 2007I have several DTS packages I need to move to SSIS. I am having trouble understanding the new tools available and how I translate my lookup and ActiveX scripts into the new format. I feel like I just need a jump start to get me on the right road. Does anyone have any good suggested links to get me started with the new technology and get my head unstuck from the old DTS?
Thanks,
Eva
Trying To Learn SQL.. Some Questions..
Oct 25, 2007 Hi all.. I install SQL Express install.. I am looking for a job, and I see companies posting want ad's for SQL server admins.
My one question... what is the difference of SQL Server vs OpenSQL ?
Thanks,
Happy Tom
Best Way To Learn SQL Mobile?
Aug 1, 2006I am an experienced web developer using PHP and MySql have experience with VB.
What is the best way for me to learn programming pocket pc's? Is using sql server mobile the best offline database to use as I will be using MySql Compact framework to connect direcly to our Linux server.
Any help is much appreciated as I can't seem to find any useful tutorials on quering an sql databse to update, insert, read or delete. I have created a datebase however, I just don't know how to use it.
Thanks in advance.
Mark
What Is Suitable To Learn DBA Or Oracle ?
Jul 16, 2003Hi:
AS a newly Master degree graduate student in IT field. My M.S. degree training has been emphasized in database developer, Web developer, Web/database developer, network, and network and computer security.
My personal interesting are database and web. have experienceon java servlet and database(create a web site), try ASP and dataabase now, but I don't have any work experience(come from other country and change major)
hope can get advice from kindness prople what is suitable to learn DBA or oracle ? conside about difficult level, cost, and suite for future job market
Thank you
Want To Learn How To Write Scripts
Sep 19, 2001Greetings:
I would like to learn to write SQL scripts to use with SQL 2000 and would like a good reference. I read the book "SQL Queries for mere mortals" and that was a start, but really didn't provide me enough depth to write the complex scripts that I need. Idealy something that goes into the programming logic like PL/SQL in Oracle did. Basiclly, if I had something that would allow me to interperet some of the scripts I see on Swynk so I can modify them to meet my needs, I think that would be a great place to start.
Any recomendations?
Thanks.
Newbie Wanting To Learn
Sep 11, 2004Hi All,
I am totally new to databases. I am starting from the absolute beginning. I want to learn MS-SQL and was wondering how/where to start. I need info on everything from installation and set-up on an Windows XP PC to programming in SQL. Is there a book or website that can guide me. I am fairly decent at programming and am able understand technical books. Installation and set up are my main concerns right now, since I believe that once I have a stable system to learn on, SQL should be easy.
Thanks!
How To Quickly Learn The Syntax Of SQL?
Jun 15, 2007Hi, All:
I know oracle SQL, now I need to do a lot of SQL query on Microsoft SQLSERVER, can any one point out any place that I can find out the syntax of SQLserver SQL statement? Since this is just a short term assignment, so I don't want to buy a book, just hoping I can learn something quickly from online. I don't need learn anything deep, just need to know some simple syntax so I can do join, count, concatenate, min(), max(), sum () etc.
thanks in advance.
JOINS To Sub-Queries -vs- JOINS To Tables
Aug 11, 2005SQL Server 2000Howdy All.Is it going to be faster to join several tables together and thenselect what I need from the set or is it more efficient to select onlythose columns I need in each of the tables and then join them together?The joins are all Integer primary keys and the tables are all about thesame.I need the fastest most efficient method to extract the data as thisquery is one of the most used in the system.Thanks,Craig
View 3 Replies View RelatedNeed To Learn SQL Server, Feeling Overwhelmed
Feb 6, 2006Hello,
My department is switching from a TM1 database to an SQL Server database. With TM1, only a few people had the software necessary to run queries installed on their PCs. Whenever I needed data, one of these people would run the query for me and then I would perform whatever analysis is required. Now however, we all have MS SQL Server (Query Analyzer, Profiler, Enterprise Manager, etc.) installed on our machines and will be able to run our own queries.
I have no prior experience with SQL (my only programming knowledge is with Excel VBA) so I bought the "Teach Yourself SQL in 10 Minutes" book and worked through most of it. I practiced writing queries in MS Access, and feel somewhat comfortable with the language. However, when I try to do anything with SQL Server, I feel kind of overwhelmed with all of the options. I assume that I should be writing and executing my queries from Query Analyzer, but I find the object browser and everything confusing. Also, I'm not sure if I'm even able to create my own database to practice with. It seems like I can only connect to my department's server. Is there any way to work "offline" with a database on my own hard drive?
All of the SQL Server books that I've found seem to be either for DBAs or developers. Anything geared more toward beginners isn't SQL Server specific. Can anyone recommend an appropriate book for me?
Thanks,
John
Rants. Difficulty To Learn ETL Tools?
Apr 16, 2007Dear Experts,I've worked with Oracle since 1995. I have gonevery deep into many of the Oracle features, includingsqlloader, and export/import. And I've done datamodelling even longer.At the same time, I have done ETL since 1995.Although, at the Proc, and PLSQL, sqlloader, level.Map the data. Take data from the source, do anymodifications/transformations that are required,and insert or update. Easy. The hard part isdetermining the mappings.But I have not been given the opportunity towork much with ETL tools such as:Informatica, DataStage, Ascential, Ab InitioThe little bit of experience that I do have,showed that Informatica was -incredibly- easy to use.It's a GUI. It's SUPPOSED to be simple!!!I have missed out on a number of opportunitiesbecause I didn't have a few YEARS of experiencewith ETL tools. Which seems odd, because thetool looks like it requires a max of a week to learn!Just how difficult are these ETL tools to learn?Especially if you have already been working withOracle, and doing data mappings and loads since 1995?I'm thinking that it can't be difficult at all.When you search for newsgroups, there are no newsgroupsfor these tools. Although the companies who makethem, might have their own newsgroup.There are also not many books on these tools.If you search for books on Oracle, or SQL Server,you will find a lot of very big, and detailedbooks. But there is next to nothing specificallyon the various ETL tools.Any certifications for any of these tools lookto be much simpler than Oracle's.To me, the real issue is the mappings. If youcome into a new environment, the data mappingsare completely esoteric to those systems.No amount of experience with an ETL tool, or anytool, is going to tell you what the mappings should be.Questions:- Just how difficult are these ETL tools to learnfor an experience Oracle pro like myself?- Other than a GUI, making everything simple to use,just what are the advantages of using ETL tools?- what built in functionality do ETL toolshave, that can't be done in PLSQL?Thanks a lot!
View 19 Replies View RelatedWant To Learn SQL In California....any School, Literaturerecommendations?
Feb 20, 2008Hi there,I have learned to create very, very basic queries at work, but I wouldlike to expand my knowledge. I live in Northern California, doesanyone know of any good schools and/or literature that could help mein this quest?Thanks a bunch,Juana
View 2 Replies View RelatedHow To Learn SSIS Related To SSAS
Dec 31, 2007I'd like to learn SSIS working with SSAS, how to transformation data for Dimension or fact tables? What are different between normal ETL tasks and ETL for Dimension / fact tables ? How to learn? Do I need to learn SSAS first? Please give tips for that. Many thanks.
I Wasnt To Learn All The Possible Ways Of Accessing Data In ASP .net 2.0
Oct 5, 2007Hello.I would like to learn all the possible ways that we can access and modify data in ASP .net 2.0 programmatically.for example one way would be like this: StringBuilder sql = new StringBuilder();sql.Append(" SELECT *"); //count the total number of recordssql.Append(" FROM dbo.tblJobTitle "); //get the connection string from web servicesstring strConnection = new sqlconnection.SQLConnection().GetSQLConnectString(sqlconnection.SQLDSN.SCIC);//Use the Microsoft.practices SqlDatabase object to execute our sql.SqlDatabase SqlHelper = new SqlDatabase(strConnection);SqlDataReader reader = (SqlDataReader)SqlHelper.ExecuteReader(CommandType.Text, sql.ToString());the i can loop through reader and get the data OR I can create a DataSet like this: SqlDatabase db = new SqlDatabase(strConnection);
DbCommand dbCommand = db.GetSqlStringCommand(sql.ToString());
DataSet dst = db.ExecuteDataSet(dbCommand);I want to know if there is a comprehensive book explainaning all these possible ways to access and modify data using C# under ASP .net 2.0I really really apreciate this.Thank you very much.
Does Anybody Know Where I Can Learn How To Add, Update, Delete Using SQL Datasource Control?
Mar 24, 2008does anybody know where I can learn how to add, update, delete using SQL datasource control? I have a couple of books that shows me how to SELECT but nothing shows me how to update, add new record or delete with the SQL data source control. Even this website doesn't have any tutorial. Does any body know where I can read up on how to use all features of this control? Or where that have a couple of examples on how to use it?
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Nov 7, 2005Hi there,Where I should start to learn using stored procedure in SQL Server?Is there any link/site that good for learning?Thanks,Ron.
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Feb 8, 2007Hello,
I need to start learning SSIS. Has anyone found any good sites that explain it and that are free?
Thanks,
Kurt
Learn Oracle Database Administration In 10 Minutes
Jul 6, 2007Learn Oracle Database Administration in 10 Minutes. No kidding. Checkit yourself,http://www.takveen.comOnly good analogy makes complex concepts simple!
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Oct 24, 2007i want to learn about the meanings of the different 'data types' in VS 2005 (database) i.e. 'nvarchar(50). could you please advice me of a good site (reference) to read.
View 1 Replies View RelatedLearn To Access Stored Procedures With ADO.NET 2.0-VB 2005:How To Work With Output Parameters && Report Their Values In VB Forms?
Feb 11, 2008Hi all,
In my SQL Server Management Studio Express (SSMSE), pubs Database has a Stored Procedure "byroyalty":
ALTER PROCEDURE byroyalty @percentage int
AS
select au_id from titleauthor
where titleauthor.royaltyper = @percentage
And Table "titleauthor" is:
au_id title_id au_ord royaltyper
172-32-1176
PS3333
1
100
213-46-8915
BU1032
2
40
213-46-8915
BU2075
1
100
238-95-7766
PC1035
1
100
267-41-2394
BU1111
2
40
267-41-2394
TC7777
2
30
274-80-9391
BU7832
1
100
409-56-7008
BU1032
1
60
427-17-2319
PC8888
1
50
472-27-2349
TC7777
3
30
486-29-1786
PC9999
1
100
486-29-1786
PS7777
1
100
648-92-1872
TC4203
1
100
672-71-3249
TC7777
1
40
712-45-1867
MC2222
1
100
722-51-5454
MC3021
1
75
724-80-9391
BU1111
1
60
724-80-9391
PS1372
2
25
756-30-7391
PS1372
1
75
807-91-6654
TC3218
1
100
846-92-7186
PC8888
2
50
899-46-2035
MC3021
2
25
899-46-2035
PS2091
2
50
998-72-3567
PS2091
1
50
998-72-3567
PS2106
1
100
NULL
NULL
NULL
NULL
////////////////////////////////////////////////////////////////////////////////////////////
I try to do an ADO.NET 2.0-VB 2005 programming in my VB 2005 Express to get @percentage printed out in the VB Form1. I read some articles in the websites and MSDN about this task and I am very confused about "How to Work with Output Parameters & Report their Values in VB Forms": (1) Do I need the Form.vb [Design] and specify its properties of the object and classes I want to printout? (2) After the SqlConnectionString and the connection.Open(), how can I bring the value of @percentage to the Form.vb? (3) The following is my imcomplete, crude draft code:
Imports System.Data
Imports System.Data.SqlClient
Imports System.Data.SqlTypes
Public Class Form1
Dim connectionString As String = "Data Source=.SQLEXPRESS;Initial Catalog=pubs;Integrated Security=SSPI;"
Dim connection As SqlConnection = New
SqlConnection(connectionString)
Try
connection.Open()
Dim command As SqlCommand = New SqlCommand("byroyalty", connection)
command.CommandType = CommandType.StoredProcedure
...................................................................
..................................................................
etc.
////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
From the above-mentioned (1), (2) and (3), you can see how much I am lost/confused in attempting to do this task. Please help and give me some guidances and good key instructions for getting the output parameter printed out in the FORM.vb in my VB 2005 Express project.
Thanks in advance,
Scott Chang
Ansi Joins Vs. SQL Joins
Oct 12, 1999Hi,
Why is it that SQL joins (*=) run a little faster as opposed to ANSI joins(LEFT JOIN...)? Aren't they supposed to be almost identical?
The issue is this: we are promoting using ANSI syntax for the obvious reason (future versions of SQL Server may not support SQL Server syntax; portability, etc.)
However, the problem is the speed. What have others done about this? Do you use ANSI syntax or SQL syntax? HOw true is it that future SQL Server versions may discontinue support for the '*=" and "=*' join operators.
Angel
UNION ALL, Joins And No Joins
Feb 29, 2008I have four tables which I want to return results for an advanced search function, the tables contain different data, but can be quite easily joined,
Table A Contains a Main Image, this image is displayed in the results
Table B Contains an Icon, this image is displayed in the results
Table C doesn't have an image in it but has a child table with a number of images associated to the table, in the UNION ALL statement I would Like to do a Join to get say the top Image from this child and print it for the row associated with table C.
Select title, description, image from tableA
UNION ALL
Select title, description, icon as image from tableB
UNION ALL
title, description, ( inner Join SELECT top(1)
from imageTableC where imagetableC.FK = tableC.PK)
as image from tableC
Could someone show me the syntax to do this, I have all the information printing to the screen, bar this table C image.
Multiple Left Joins (2 Left Joins 1 Big Headache)
Sep 1, 2005Hi All,
Im having a problem with a statement i cannot seem to get 2 left joins working at the same time 1 works fine but when i try the second join i get this error:-
Microsoft OLE DB Provider for ODBC Drivers error '80040e14'
[Microsoft][ODBC Microsoft Access Driver] Syntax error (missing operator) in query expression 'children_tutorial.school_id=schools.idx LEFT JOIN regions ON children_tutorial.region_id=region.idx'.
My SQL statment is as follows :-
SELECT children_tutorial.*,schools.schoolname,regions.rname FROM children_tutorial LEFT JOIN schools ON children_tutorial.school_id=schools.idx LEFT JOIN regions ON children_tutorial.region_id=region.idx
I am using an Access database i have tried all sorts to get it working and its driving me mad!! any help would be really appreciated.
Inner Joins
Jan 27, 2004When I add a constraint to the where part of the SQL statement below it will only show the nc_department.department where siteid equals it. How do I pull and display all of those departments regardless of where the siteid = the selected item? In other words doesnt the Left outer Join supposed to grab all contents from the left table regardless?
SQL = "SELECT nc_department.order_id, nc_department.department, Count(nonconformance.department_id) as 'events', ISNULL(SUM(nonconformance.nc_wafer_qty),0) as wafers FROM nc_department LEFT OUTER JOIN nonconformance ON nc_department.department_id = nonconformance.department_id WHERE nc_department.active = '1' AND nonconformance.site_id = '" & siteid.SelectedItem.Value & "' GROUP BY nc_department.department , nc_department.order_id"
thanks in advance
JOINS And WHERE
May 21, 2001JOIN MUDDLE
Soory if this is a bit basic, but I'm chasing my tail:
I have two select statements:
SELECT MyRows from Table1 where X = 1
SELECT OtherRows From Table 2 Where y = 3
I want to produce a LEFT JOIN between the result of each query, and return the resultant rows
I know this is not correct syntax:
(SELECT MyRows from Table1 where X = 1)
LEFT JOIN
(SELECT OtherRows From Table 2 Where y = 3)
ON
Tabel1.Row1 = Table2.Row2
but I think it illustrates what I want to do
If I do the WHERE after the join I only get where there is a righthand table
I cant get the syntax right, an example with the correct grammar would be very much appreciated
Help-Joins
May 25, 2001I am trying to figure out which Option is the best/fastest and why?
I have simplified the query a lot. The actual query consists of lots of tables.
OPTION A (the search for the specific id is in the JOIN)
select * from table A left join table B on a.id = b.id and a.id in (1,2,3)
OR
OPTION B(the search for specific id is in the WHERE clause)
select * from table A left join table B on a.id = b.id
where a.id in (1,2,3)