SQL queries Learning

Hello All,
I am Oracle Financial Functional consultant and now trying to leran the Technical Stuff.
Right now I would like to learn Oracle Financial SQL queries which is must to do my current role.
Can some one please guide me to learn the OF SQL queries.
Your help is much appreciated!
Ramesh

That's a very broad question....
Probably you're better of in the Financials Forum @ Financials
If you want to know how SQL works in Oracle, then dive into the docs and so some searches:
http://www.oracle.com/pls/db102/homepage
http://www.oracle.com/pls/db112/homepage
and there's always Google ;)

Similar Messages

Need help in SQL Queries using GUI controls or variables

Hello, all
I have a big problem (I have already had with Visual Basic a few mounths ago) with Java while writing my SQL Queries.
I would like to know how I must do to use variable data or GUI control data in my SQL Query to select only some records.
Here, my first Query that works without any problem (no WHERE clause !!!) :
Statement requeteBedes = connectBedes.createStatement();
ResultSet resultatSeries = requeteBedes.executeQuery("SELECT * FROM Series");
initComboBoxSeries(resultatSeries);the method "initComboBoxSeries" fills a JComboBox with all the names of the series in my database.
Here comes my problem.I would like to use the value of the selected "series" in the JComboBox to search in another table of the same Database. I made another statement but it returns a Null ResultSet :
ResultSet resultatSearchAlbumsFromSeries = requeteBedes.executeQuery("SELECT * FROM bandes_dess WHERE ser_nom = '" + strComboBoxSeriesSelected + "' "); The variable strComboBoxSeriesSelected contains the value of the selected line in the combobox with all the series, filled after the first query that is here above and that works very well.
Could some one help me and tell me how I must use variables or GUI controls values in my SQL Queries or tell me if there is a place where I could find an explanation of that kind of problems (like more "advanced SQL Queries", as the ones currently used in all the Learning Java 2 books)
Thank you all for your help.
Christian.

executeQuery() will never return null. At least that's what the spec says. You are probably catching an exception (probably a syntax error caused by a single quote in strComboBoxSeriesSelected) and ignoring it. Or do you mean the ResultSet contains no rows?
Anyway, to use parameterized queries, take a look at PreparedStatements. Your code should look like this using PreparedStatement:Statement requeteBedes = connectBedes.prepareStatement("SELECT * FROM bandes_dess WHERE ser_nom = ?");
requeteBedes.setString(1, strComboBoxSeriesSelected);
ResultSet resultatSeries = requeteBedes.executeQuery();Alin.

View SQL queries during runtime

In the Jdev tutorials I noticed the running tab displaying the sql queries that are being run in the application. How can I turn this on? Using 10.1.3.0.4
thanks

Please see sections "5.5.3.2 Enabling ADF Business Components Debug Diagnostics" , "8.3.4 Debugging the Application Module Using the Business Components Tester", and "Chapter 24 Testing and Debugging Web Applications" of the ADF Developer's Guide for Forms/4GL Developers on the ADF Learning Center at http://www.oracle.com/technology/products/adf/learnadf.html for more useful information on this.

Want to write sql queries online

Hi,
I want to write and test sql queries online. Because oracle database is too large I do not want to install it on my system. Is there any virtual environment where I can learn sql queries and test without installing it on my local machine?

SQL Fiddle apparently offers a test bed for various databases including Oracle 11gR2.
I haven't used it myself but it was highly recommended by SQL Indexing Tutorial | Use The Index, Luke! which is a good SQL performance tutorial.

Aborting Sql Queries

hello all
i have a query. i want to abort a query running in a thread with a help of another thread
my programs looks like this
public class test
          public static void main(String args[]) throws Exception
               String driverName = "oracle.jdbc.driver.OracleDriver";
               String url = "jdbc:oracle:thin:@192.168.103.46:1521:test";
          Class.forName(driverName); // load the driver
               Connection connection = DriverManager.getConnection(url, "scott", "tiger");
               ConnThread connThread = new ConnThread();
               connThread.stmt = connection.prepareCall("{call NEWOBJECT(?)}");
connThread.stmt.registerOutParameter(1,OracleTypes.CURSOR);
               connThread.start();
               System.out.println ("waiting");
               Thread.sleep(20);
               System.out.println ("waiting done");
               System.out.println ("closing conn");
               connThread.stmt.cancel();
               System.out.println ("closing conn done");
     class ConnThread extends Thread
          CallableStatement stmt = null;
          public void run()
               try
                    System.out.println ("Executing query");
                    stmt.executeQuery();
                    System.out.println ("Executing query done");
               catch(Exception e)
                    e.printStackTrace();
My prob is that i have achieved that in case of normal sql query. but i have to do the same for SQL procedures. can ne one tll me is it even possible to do so. Also i want to check this for range of databases mainly for oracle, MS SQL and MS Access.
Thanking in advance
Regards
Saurabh

Kiran Bathula wrote:
How to tune SQL Queries ?
Learn how the optimizer works.
Learn what it it capable of.
And then.
Just start. The only way to become a SQL tuner, is to just do it (and do it many many times).

Sql queries for this database schema

1) Patient—PatientID, Name, DOB
2) Doctor—DoctorID, Name, MedLicenseNumber, Phone
3) Medication—MedicationID, BrandName, GenericName
4) Prescription—PrescriptionID, Date, PatientID, PrescriberID, MedicationID
Specify the SQL queries to retrieve:
a) The prescription information along with patient name, DOB, medication brand name, and prescribing doctor name sorted by most recent date.
b) The most prescribed generic medication name

Looks like assignment question to me
a, seems to be a case of straight forward join among all the involved tables on common fields. Suggest you learn about joins and try it out yourself.
see below link
http://www.w3schools.com/sql/sql_join.asp
b, Have a look at GROUP BY. you need to apply group by and take medicine name which repeats maximum (ie largest count value)
see
http://www.w3schools.com/sql/sql_groupby.asp
Please Mark This As Answer if it helps to solve the issue Visakh ---------------------------- http://visakhm.blogspot.com/ https://www.facebook.com/VmBlogs

SQL Queries Tunning

Hi,
How to tune SQL Queries ? Performance wise what precautions to take for writing the SQL queries ?
Regards,
Kiran

Kiran Bathula wrote:
How to tune SQL Queries ?
Learn how the optimizer works.
Learn what it it capable of.
And then.
Just start. The only way to become a SQL tuner, is to just do it (and do it many many times).

Why it's so inefficient to generate XML from SQL queries?

I am learning to use Oracle9i XML DB to generate XML document using SQL queries. According to the document, there are multiple ways to do it (SQLX, DBMS_XMLGEN, SYS_XMLGEN, XSU). I am using SQLX to do it, but find it's so inefficient. Could someone point out what could be the problem?
I generate XML from TPC-H database, using the query as shown below. The indexes and primary key/foreign keys are created and specified. The system is Pentium IV 2GHz, Linux 2.4.18 with 512MB memory and 1GB swap. With database size 5MB, it spends about 300 seconds (TKPROF result) to generate the XML document. But for 10MB TPCH database, I cannot get the xml document after a long time. I find that all almost physical memory are used up by it. Therefore I stop it.
It seems that nested-loop join is used to evaluate the query, therefore it's very inefficient. I don't know whether there is a efficient way to do it.
Wish to get your help. Thank you very much!
Chengkai Li
===================================================================================================================
SELECT XMLELEMENT (
"region",
XMLATTRIBUTES ( r_regionkey AS "regionkey", r_name AS "name", r_comment AS "comment"),
(SELECT XMLAGG(
XMLELEMENT (
"nation",
XMLATTRIBUTES ( n_nationkey AS "nationkey", n_name AS "name", n_regionkey AS "regionkey", n_comment AS "comment"),
XMLConcat ((SELECT XMLAGG(XMLELEMENT (
"supplier",
XMLATTRIBUTES ( s_suppkey AS "suppkey", s_name AS "name", s_address AS "address", s_nationkey AS "nationkey", s_phone AS "phone", s_acctbal AS "acctbal", s_comment AS "comment"),
(SELECT XMLAGG(XMLELEMENT (
"part",
XMLATTRIBUTES ( p_partkey AS "partkey", p_name AS "name", p_mfgr AS "mfgr", p_brand AS "brand", p_type AS "type", p_size AS "size", p_container AS "container", p_retailprice AS "retailprice", p_comment AS "comment", ps_availqty AS "ps_availqty", ps_supplycost AS "ps_supplycost", ps_comment AS "ps_comment")))
FROM PART p, PARTSUPP ps
WHERE ps.ps_partkey = p.p_partkey
AND ps.ps_suppkey = s.s_suppkey
FROM SUPPLIER s
WHERE s.s_nationkey = n.n_nationkey
(SELECT XMLAGG(XMLELEMENT(
"customer",
XMLATTRIBUTES ( c_custkey AS "custkey", c_name AS "name", c_address AS "address", c_nationkey AS "nationkey", c_phone AS "phone", c_acctbal AS "acctbal", c_mktsegment AS "mktsegment", c_comment AS "comment"),
(SELECT XMLAGG(XMLELEMENT (
"orders",
XMLATTRIBUTES ( o_orderkey AS "orderkey", o_custkey AS "custkey", o_orderstatus AS "orderstatus", o_totalprice AS "totalprice", o_orderdate AS "orderdate", o_orderpriority AS "orderpriority", o_clerk AS "clerk", o_shippriority AS "shippriority", o_comment AS "ps_comment"),
(SELECT XMLAGG(XMLELEMENT (
"lineitem",
XMLATTRIBUTES ( l_orderkey AS "orderkey", l_partkey AS "partkey", l_suppkey AS "suppkey", l_linenumber AS "linenumber", l_quantity AS "quantity", l_extendedprice AS "extendedprice", l_discount AS "discount", l_tax AS "tax", l_returnflag AS "returnflag", l_linestatus AS "linestatus", l_shipdate AS "shipdate", l_commitdate AS "commitdate", l_receiptdate AS "receiptdate", l_shipinstruct AS "shipinstruct", l_shipmode AS "shipmode", l_comment AS "comment")
FROM LINEITEM l
WHERE l.l_orderkey = o.o_orderkey
FROM ORDERS o
WHERE o.o_custkey = c.c_custkey
FROM CUSTOMER c
WHERE c.c_nationkey = n.n_nationkey
FROM NATION n
WHERE n.n_regionkey = r.r_regionkey
FROM REGION r;

Tim,
Oracle Reports was the orginal way to do this in an Oracle Apps environment. However, the XML Publisher team built a tool called data templates to do this as well. You can read several articles on how to use data templates on the XMLP blog. Here's the first arcticle in a series: http://blogs.oracle.com/xmlpublisher/2006/11/08#a127.
Bryan

Erratic Report Region Behavior with Dynamic SQL Queries

I'm running HTMLDB v 1.5.1.00.12 and I've noticed some odd behavior with report regions using dynamic SQL queries. Every so often, our testers will run a page containing a dynamic sql report region and get the following error, (despite the fact the query was working only moments ago and no other developer has touched it):
ORA-06502: PL/SQL: numeric or value error: character string buffer too small
or sometimes
failed to parse SQL query:ORA-01403: no data found
The only solution I've found so far is to:
1) Make a copy of the failed report region.
2) Disable or delete the original failed report region.
The new copy of the report region runs without issue.
My search of the forums turned up the following two threads, but neither provided me with a clear explanation of the cause, and how to avoid it:
ORA-06502:PL/SQL: numeric or value error: character string buffer too small
Re: Import Export Error (ORA-06502)
The columns being returned are below the 4000 character limit, and the rows being returned are far less than 32k in size.
Could this have anything to do with the way HTMLDB is internally storing the PL/SQL used to generate the dynamic SQL Query? Is there any known issue related to this with that version of HTMLDB?
This problem occurs without any discernable pattern or consistency, making it hard to determine where I should focus my efforts in tracking down the cause.

Hi all,
My report seems to be behaving correctly once i set it to "Use Generic Column Names (parse query at runtime only)" :)
Cheers,
Joel

Error while running the sql queries in unix as cron job..

Hi,
I've configured some sql queries to run as cronjob from unix,i'm able to excute all the sql queries with out any error,after all the queries are executed,I'm getting the following error message.
ORA-00600: internal error code, arguments: [4080], [1], [131], [], [], [], [],
Could any one advise me why this error is being thrown?
How to avoid this error?
Thanks,
Anil

Are you running these queries through TopLink?
If so, the error seems to be occurring on the database, when the query is being executed.
I have never seen that error before. Performing some websearches it seems to be a general database error, potentially something to do with synchronization. Sorry I can't be of more help, perhaps the database forum can provide more insight...

How to get the SQL queries based on SQL_ID.

Hi Experts,
I want to get the SQL queries based on SQL_ID.
I have tried the following query,but I am not getting full query.
[code]SET linesize 132 pagesize 999
column sql_fulltext format a60 word_wrap
break on sql_text skip 1
SELECT   REPLACE (TRANSLATE (sql_text, '0123456789', '999999999'), '9', ''),sql_id
FROM   dba_hist_sqltext s
WHERE   s.sql_id = '7tvurftg8zryb';[/code]
One of my friend said use grid to get full query text.
Can you please help me how to use grid ,else any other method to get the full query based on SQL_ID.
Please help me.
Thanks in advance.

You have these many options to set, if sql_text is really huge. But better use a tool(TOAD) as it's really helpful and easy to use instead! (See my previous comment).
column sql_text format A10000
set echo off
set head off
set feed off
set verify off
set termout off
set lines 10000
set long 1000000
set trimspool on
set pages 0
Thanks!

Developing portlets for dummies (sql queries)

Hello, I've been trying to build a dynamic menu. First I went with just plain old plsql: i created a function in the portal schema that returns an unordered, nested list of the pages in my pagegroup and called that function in a regular pl/sql item on my portal page. I did this by querying the wwpob_page$ table and that went just great in my test&development setup (of which I am the admin of course :))
Then I realized that since I'm not an administrator of the server hosting our portal and I only have very limited privileges (I am only a page group administrator) I will probably not be allowed to utilize this function nor will they agree to install it in the portal schema, and I decided I should build a portlet that does the same thing (so it can be registered and so on, and so it can use the synonyms and tools that are available to registered providers). There already is such a portlet (and provider) registered for use in the target portal, but I don't like it because i uses tables and hard-coded styles so I will cook my own, better version. :)
So I downloaded an example portlet and am getting the hang of it, but now I just can't for the life of me figure out how to enable any sql-queries. I have run the provsyns-.sql script, logged in as test_provider/portal and installed my portlet-package as test_provider user. I can see the available pl/sql packages in Toad, but there are no tables or views for me to to see. That means I can't query the portal tables that I need to.
edit: ok, stupid user error; I suck at using Toad, so I was looking at the wrong schema altogether :D So now i see the public views and packages, so forget that bit of the question.
But still, I cannot see even wwsbr_all_folders -view, much less the wwpob_page$ -table. I cannot see any way to find the pages that are in my page group. Somehow it must be doable, right?
Have I done something wrong, missed a step in enabling my test-provider / schema perhaps? I don't really know what I'm doing, but I followed instructions here: http://home.c2i.net/toreingolf/oracle/portal/my_first_plsql_portlet.htm (excellent instructions, thanks!)
So should my portlet be able to access those tables or not? How the heck has the third partly portlet maker done it?
i'm on OracleAS Portal 10g Release 2 (10.1.4)
Edited by: Baguette on 23-Apr-2009 05:13
Edited by: Baguette on 23-Apr-2009 05:32

i see your perspective now. and let me give a perspective to my first reply too.
what i proposed to you was the answer of what i quoted in the message. that is, why didn't you see those views in the new schema you created! and it is still ok but it is done in the portal schema for which you should have privielges too and i assumed you had. my mistake!
now, i can relate your privacy concerns with your earlier message:
Hello, I've been trying to build a dynamic menu. First I went with just plain old plsql: i created a function in the portal schema that returns an unordered, nested list of the pages in my pagegroup and called that function in a regular pl/sql item on my portal page. I did this by querying the wwpob_page$ table and that went just great in my test&development setup (of which I am the admin of course :))
+Then I realized that since I'm not an administrator of the server hosting our portal and I only have very limited privileges (I am only a page group administrator) I will probably not be allowed to utilize this function nor will they agree to install it in the portal schema, and I decided I should build a portlet that does the same thing (so it can be registered and so on, and so it can use the synonyms and tools that are available to registered providers). There already is such a portlet (and provider) registered for use in the target portal, but I don't like it because i uses tables and hard-coded styles so I will cook my own, better version. :)+
+So I downloaded an example portlet and am getting the hang of it, but now I just can't for the life of me figure out how to enable any sql-queries. I have run the provsyns-.sql script, logged in as test_provider/portal and installed my portlet-package as test_provider user. I can see the available pl/sql packages in Toad, but there are no tables or views for me to to see. That means I can't query the portal tables that I need to.+
- by downloading an example portlet, you probably mean you created a new schema. because provsyns work on a schema.
- if you are not the administrator of the portal, and may not be able to access some portions of the portal, it means that you do not use the portal user (the user which serves as the owner of the portal schema).
- now, your plan to create a new schema and give those privielges would still not work. because, by creating a new schema you cannot sneak in to the oriignal portal schema if you do not have privileges to do it. obvious, right? otherwise, it would be a vulnerability of the software that you can see what you are not allowed to see by creating a new schema.
- however, there is a bright side here. the views give records based on your privileges.
- so if your administrators have generated them already or if they generate on the original portal schema, then you may see the pages and items that you have privileges to see and no more.
so now, you may ask the administrators if they have already done it, and if not, then if they would be willing to do it.
hope that helps!
AMN

Ruby code for sql queries

Hello everybody,
First off, let me apologize if my inquiry does not belong on this forum. I am confident however, that someone here has had experience with this since Oracle and ruby on rails/ruby are used frequently. My fingers are crossed, here's is my problem:
I am currently working on a database system that utilizes ruby on rails
with a oracle database. Here's the situation:
the ruby on rails web application is up and running;
my oracle database is full of tables that are populated with data;
there is a successful connection between rails and my oracle database;
however, what isn't finished is I currently have data mining queries in
sql (eg. find minimum time someone has been employed = "Select
min(time) from table...etc") and what I need to do is write one ruby
program for each of my sql queries so that the ruby program:
1) connects to the oracle database each time the query is called
2) runs the sql query on the oracle database
3) takes the results from the query and returns them in an array or
something of that nature (so that I can use the results in an html file
on the ruby on rails web application).
Again, I apologize if this question does not belong on this forum. If someone however has experience with this could you please give me example code of what this would look like (using different sql queries). Thank you

I apologize if this question does not belong on this forum. OTN does have a forum dedicated to Ruby/Ruby On Rails. I admit it doesn't seem to get much traffic. I think that's because most people working with Ruby tend to go for F/OSS products.
Cheers, APC
Blog : http://radiofreetooting.blogspot.com/

SQL queries parser.

Hello,
I have quite strange question related to my research.
Probabley within Oracle DB there is some dynamic library which is parsing SQL queries,
for example.
SELECT * FROM schema.table which is able to extract informations from SQL listed above that we want to display all columns from selected table.
When this construction is valid ( SQL standard ) the next step is verification the object existence in DB. It means
that there are two separated actions which are analyzing queries.
I need only first part of that process, which will give me informations about all object used in SQL query
is it possible to accomodate that internal parser witin stand alone middleware like Weblogic Event Server ?
I can do it with regular expression patters, but it's not going to be fast and effective for subqueries and all advanced
constructions for DHW like MODEL, etc.
Thank You,
R.

>
http://search.cpan.org/~rehsack/SQL-Statement-1.23/lib/SQL/Statement.pm
BUGS AND LIMITATIONS ^
* currently we treat NULL and '' as the same - eventually fix
* No nested C-style comments allowed as SQL99 says
>
That's the reason why I want to use dedicated for 11g EE library ;-)
Thanks for quick reply

? in SQL Queries and not using prepared statements

Using EclipseLink 1.1.1
Prepared Statements are disabled
In our production server something went wrong and one of our Read Queries started erroring. A DatabaseException was thrown and we log the "getQuery.getSQLString()" statement. We found this query in the logs:
SELECT t1.ID, t1.NAME, t1.DESCRIPTION, t1.EXTREFID, t1.STYLESHEET, t1.DDSVNVERSION, t1.FIRSTNAME, t1.LASTNAME, t1.EMAILADDR, t1.PHONENUMBER, t1.ADDRESS, t1.ADDRESS2, t1.CITY, t1.STATE, t1.POSTALCODE, t1.COUNTRY, t1.ADMINACCTNAME, t1.HASDOCUMENTS, t1.HASTIMEDNOTIFICATIONS, t1.STATUS, t1.ENTRYDATE, t1.EVALEXPDATE, t1.LASTREMINDDATE, t1.FULLUSERS, t1.LIMUSERS, t1.REQUSERS, t1.ISENTERPRISE, t1.EXPDATE, t1.ISDISABLED, t1.DISABLEDDATE, t1.NEEDLICENSEAGREEMENT, t1.ISWARNINGDISABLED, t1.LOCALE, t1.TIMEZONE, t1.CURRENCY, t1.DOMAIN, t1.DOCUMENTSIZE, t1.EXTRADOCUMENTSTORAGE, t1.ONDEMANDOPTIONS, t1.SSOTYPE, t1.RESELLERID, t1.ACCOUNTREPID, t1.LASTUSAGEREPORTDATE, t1.NEXTUSAGEREPORTDATE, t1.USAGEREPORTATTEMPTS FROM T_SSOOPTIONS t0, T_CUSTOMERS t1 WHERE *((((t0.SSOENABLED = ?) AND (t1.SSOTYPE IN (?, ?))) AND (UPPER(t1.DOMAIN) = ?)) AND (t0.CUSTOMERID = t1.ID))*
Notice the values weren't entered into the where clause. We had to bounce the application to fix the problem. I've never seen this before. I've added more debugging statements to the code - so if this happens again in the future I'll have more information to report on. In the mean time I'm wondering if anyone else has every seen a problem of this nature.

Database error due to invalid SQL statement.
I don't have a stack, we were catching the exception and not printing the stack :(
Like I mentioned in my first post, I added more debugging code (e.printStackTrace()). I understand this is hard to track down without more information. I was just hoping you guys had seen something like this before and had any insight. Like I mentioned before: this is on our production server. I've never seen this type of error before. That particular server (we run in a cluster mode) had been up for several days and then started generating that error. IT bounced the node and everything went back to normal. We have been using toplink for about 5 years now and have never seen this problem, until August 3rd 2009. The only thing that has changed recently is our migration from toplink 10 to EclipseLink. I was wondering if anyone knows if anything had changed in EclipseLink/toplink 11 with the generation of SQL queries.
I'll keep looking. There is more debugging code in there now. Since the error was "Database error due to invalid SQL statement" this implies the SQL was generated, exited that part of the code and was sent to the db where it failed. I'm afraid the printStackTrace won't help if this error happens again.

SQL queries Learning

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