This question might be lazy question. While I was using netbean to run query and also sql workbench then each time I run query and use it in .java file as
String sql = "select * from some table "+
"where table.col = 'sth'" //the query is not this short
Adding + and "" easily without going to each line and adding in 100 line of query.
Is there any way that netbeans or Oracle sql developer support direct export ast this kind of string or is there any other alternative.
Using Advance Format you can. HUrray! IN oracle SQl Developer
Related
Hello for demonstration purposes I trimmed out my actual sql query.
I have a SQL query
SELECT *
FROM dbdev.training.courses
where dbdev is my DEV database table name. When I migrate to TEST env, I want my query to dynamically change to
SELECT *
FROM dbtest.training.courses
I tried using input parameters like {env: p('db_name')} and using in the query as
SELECT * FROM :env.training.courses
or
SELECT * FROM (:env).training.courses
but none of them worked. I don't want my SQL query in properties file.
Can you please suggest a way to write my SQL query dynamically based on environment?
The only alternative way is to deploy separate jars for different environments with different code.
You can set the value of the property to a variable and then use the variable with string interpolation.
Warning: creating dynamic SQL queries using any kind of string manipulation may expose your application to SQL injection security vulnerabilities.
Example:
#['SELECT * FROM $(vars.database default "dbtest").training.courses']
Actually, you can do a completely dynamic or partially dynamic query using the MuleSoft DB connector.
Please see this repo:
https://github.com/TheComputerClassroom/dynamicSQLGETandPATCH
Also, I'm about to post an update that allows joins.
At a high level, this is a "Query Builder" where the code that builds the query is written in DataWeave 2. I'm working on another version that allows joins between entities, too.
If you have questions, feel free to reply.
One way to do it is :
Create a variable before DB Connector:
getTableName - ${env}.training.courses
Write SQL Query :
Select * from $(getTableName);
I am trying to pass some tuning parameters to my Netezza database in my SQL code but RODBC and ODBC packages does not like it.
I have tried running this query directly in Netezza and it works fine but when it's encapsulated using sqlQuery it returns no data.
My query looks as follows:
system.time(test <- as.data.table(sqlQuery(netezza_prod_conn,
"set JIT_SAMPLE_GROWTH_POWER = 0.54;
set PREBROADCAST_LIMIT = 30;
SELECT
NOW()")))
I believe it's related to the semi colons and when it finishes the first query which returns nothing it never moves on to the next piece.
Is there a workaround to include multiple SQL statements with sqlQuery?
It seems to me that this is more of a ‘rodbc’ package specific question than the other 3 categories, but on all the places that I have googled the ‘solution’ to your question is to split the string on ‘;’ and then execute each as a separate sqlQuery
I can confirm that as long at you keep the connection open against Netezza it will not ‘forget’ your tuning settings once it executes the last statement.
is there a simple way to just output each record in a select statement to write to its own file?
for example, if you have the tsql query in sql server 2005,
select top 10 items, names + ':' + address from book
and you ended up with 10 text files with the individual name and addresses in each file.
is there a way to do this without writing an extensive spWriteStringToFile procedure? I'm hoping there is some kind of output setting or something in the select statement.
thanks in advance
SQL returns the result set first, there's no opportunity in there for writing records to specific files until afterwards.
Being SQL Server 2005, it's possible you could use a SQLCLR (.NET 2.0 code) function in a SQL statement without having to make a separate application.
In SSMS, you can do a results to file, but that wouldnt split each record out into its own file. I pretty sure you cannot do this out of the box, so it sounds like you will be rolling your own solution.
You'd do this in some client, be it Java, VBA or SSIS typically.
MS Access has limited capabilities to manage raw SQL queries: the editor is quite bad, no syntax highlighting, it reformats your raw SQL into a long string and you can't insert comments.
Debugging complex SQL queries is a pain as well: either you have to split it into many smaller queries that become difficult to manage when your schema changes or you end-up with a giant query that is a nightmare to debug and update.
How do you manage your complex SQL queries in MS Access and how do you debug them?
Edit
At the moment, I'm mostly just using Notepad++ for some syntax colouring and SQL Pretty Printer for reformatting sensibly the raw SQL from Access.
Using an external repository is useful but keeping there's always the risk of getting the two versions out of sync and you still have to remove comments before trying the query in Access...
For debugging, I edit them in a separate text editor that lets me format them sensibly. When I find I need to make changes, I edit the version in the text editor, and paste it back to Access, never editing the version in Access.
Still a major PITA.
I have a few tips that are specific to SQL in VBA.
Put your SQL code with a string variable. I used to do this:
Set RS = DB.OpenRecordset("SELECT ...")
That is hard to manage. Do this instead:
strSQL = "SELECT ..."
Set RS = DB.OpenRecordset(strSQL)
Often you can't fix a query unless you see just what's being run. To do that, dump your SQL to the Immediate Window just before execution:
strSQL = "SELECT ..."
Debug.Print strSQL
Stop
Set RS = DB.OpenRecordset(strSQL)
Paste the result into Access' standard query builder (you must use SQL view). Now you can test the final version, including code-handled variables.
When you are preparing a long query as a string, break up your code:
strSQL = "SELECT wazzle FROM bamsploot" _
& vbCrLf & "WHERE plumsnooker = 0"
I first learned to use vbCrLf when I wanted to prettify long messages to the user. Later I found it makes SQL more readable while coding, and it improves the output from Debug.Print. (Tiny other benefit: no space needed at end of each line. The new line syntax builds that in.)
(NOTE: You might think this will let you add add comments to the right of the SQL lines. Prepare for disappointment.)
As said elsewhere here, trips to a text editor are a time-saver. Some text editors provide better syntax highlighting than the official VBA editor. (Heck, StackOverflow does better.) It's also efficient for deleting Access cruft like superfluous table references and piles of parentheses in the WHERE clause.
Work flow for serious trouble shooting:
VBA Debug.Print > (capture query during code operation)
query builder > (testing lab to find issues)
Notepad++ > (text editor for clean-up and review)
query builder > (checking, troubleshooting)
VBA
Of course, trouble shooting is usually a matter of reducing the complexity of a query until you're able to isolate the problem (or at least make it disappear!). Then you can build it back up to the masterpiece you wanted. Because it can take several cycles to solve a sticky problem, you are likely to use this work flow repeatedly.
I wrote Access SQL Editor-- an Add-In for Microsoft Access-- because I write quite a lot of pass-through queries, and more complex SQL within Access. This add-in has the advantage of being able to store formatted SQL (with comments!) within your Access application itself. When queries are copied to a new Access application, formatting is retained. When the built-in editor clobbers your formatting, the tool will show your original query and notify you of the difference.
It currently does not debug; if there was enough interest, I would pursue this-- but for the time being the feature set is intentionally kept small.
It is not free for the time being, but purchasing a license is very cheap. If you can't afford it, you can contact me. There is a free 14-day trial here.
Once it's installed, you can access it through your Add-Ins menu (In Access 2010 it's Database Tools->Add Ins).
Debugging is more of a challenge. If a single column is off, that's usually pretty easy to fix. But I'm assuming you have more complex debugging tasks that you need to perform.
When flummoxed, I typically start debugging with the FROM clause. I trace back to all the tables and sub-queries that comprise the larger query, and make sure that the joins are properly defined.
Then I check my WHERE clause. I run lots of simple queries on the tables, and on the sub-queries that I've already checked or that I already trust, and make sure that when I run the larger query, I'm getting what I expect with the WHERE conditions in place. I double-check the JOIN conditions at the same time.
I double-check my column definitions to make sure I'm retrieving what I really want to see, especially if the formulas involved are complicated. If you have something complicated like a coordinated subquery in a column definition
Then I check to see if I'm grouping data properly, making sure that "DISTINCT"'s and "UNION"'s without UNION ALL don't remove necessary duplicates.
I don't think I've ever encountered a SQL query that couldn't be broken down this way. I'm not always as methodical as this, but it's a good way to start breaking down a real stumper.
One thing I could recommend when you write your queries is this: Never use SELECT * in production code. Selecting all columns this way is a maintenance nightmare, and it leads to big problems when your underlying schemas change. You should always write out each and every column if you're writing SQL code that you'll be maintaining in the future. I saved myself a lot of time and worry just by getting rid of "SELECT *"'s in my projects.
The downside to this is that those extra columns won't appear automatically in queries that refer to "SELECT *" queries. But you should be aware of how your queries are related to each other, anyway, and if you need the extra columns, you can go back and add them.
There is some hassle involved in maintaining a code repository, but if you have versioning software, the hassle is more than worth it. I've heard of ways of versioning SQL code written in Access databases, but unfortunately, I've never used them.
If you're doing really complex queries in MS Access, I would consider keeping a repository of those queries somewhere outside of the Access database itself... for instance, in a .sql file that you can then edit in an editor like Intype that will provide syntax highlighting. It'll require you to update queries in both places, but you may end up finding it handy to have an "official" spot for it that is formatted and highlighted correctly.
Or, if at all possible, switch to SQL Server 2005 Express Edition, which is also free and will provide you the features you desire through the SQL Management Studio (also free).
Expanding on this suggestion from Smandoli:
NO: DoCmd.RunSQL ("SELECT ...")
YES: strSQL = "SELECT ..."
DoCmd.RunSQL (strSQL)
If you want to keep the SQL code in an external file, for editing with your favorite text editor (with syntax coloring and all that), you could do something like this pseudo-code:
// On initialization:
global strSQL
f = open("strSQL.sql")
strSQL = read_all(f)
close(f)
// To to the select:
DoCmd.RunSQL(strSQL)
This may be a bit clunky -- maybe a lot clunky -- but it avoids the consistency issues of edit-copy-paste.
Obviously this doesn't directly address debugging SQL, but managing code in a readable way is a part of the problem.
Similar to recursive, I use an external editor to write my queries. I use Notepad++ with the Light Explorer extension for maintaining several scripts at a time, and Notepad2 for one-off scripts. (I'm kind of partial to Scintilla-based editors.)
Another option is to use the free SQL Server Management Studio Express, which comes with SQL Server Express. (EDIT: Sorry, EdgarVerona, I didn't notice you mentioned this already!) I normally use it to write SQL queries instead of using Access, because I typically use ODBC to link to a SQL Server back end anyway. Beware that the differences in the syntax of T-SQL, used by SQL Server, and Jet SQL, used by Access MDB's, are sometimes substantial.
Are you talking here about what MS-Access calls 'queries' and SQL call 'views' or about the 'MS-Access pass-through' queries which are SQL queries? Someone could get easily lost! My solution is the following
free SQL Server Management
Studio Express, where I will
elaborate and test my queries
a query table on the client
side, with one field for the query
name (id_Query) and another one
(queryText, memo type) for the
query itself.
I then have a small function getSQLQuery in my VBA code to be used when I need to execute a query (either returning a recordset or not):
Dim myQuery as string, _
rsADO as ADODB.recorset
rsADO = new ADODB.recordset
myQuery = getSQLQuery(myId_Query)
'if my query retunrs a recordset'
set rsADO = myADOConnection.Execute myQuery
'or, if no recordset is to be returned'
myADOConnection.Execute myQuery
For views, it is even possible to keep them on the server side and to refer to them from the client side
set rsADO = myADOConnection.execute "dbo.myViewName"
Well to my knowledge there are 2 options:
Notepad++ with Poor man's t-sql formatter plugin ..i know there is already a mention for SQL Pretty Printer but i haven't used it..so my workflow is ..i create the query in Access..i copy paste it to Notepad++ ...i format it..i work on it ...back to Access..only issue..it pads in some cases spaces in this case : [Forms]![AForm].[Ctrl] and they become [Forms] ! [AForm].[Ctrl] but i am used to and it doesn't bother me..
SoftTree SQL Assistant (http://www.softtreetech.com/sqlassist/index.htm) bring just about everything you wanted on a SQL editor...i have worked a bit in the past(trial) but its price tag is a bit stiff
I'm trying to use ADO to create several tables at once, into MS Access. Is it possible to do multiple statements in the one operation? For instance:
...
// I have omitted the field details
CString sQuery = "CREATE TABLE [Table1] (..., PRIMARY KEY ([ID])); \nCREATE TABLE [Table2] (..., PRIMARY KEY ([ID]));";
oRecordset.Open(oDatabase.m_pConnection, sQuery)
This fails due to a "Syntax Error in CREATE TABLE statement", although each of the create statements work on their own perfectly. Is there a way of doing this sort of thing? There will also be statements to add constraints, add indexing, etc., and I'd really like to be able to do it so that I don't have to split up the string into separate parts.
ADO isn't the issue: the ACE/Jet engine simply does not support multiple SQL statements within a single operation. In other words, ACE/JET SQL lacks procedural syntax found in most 'industrial-strength' SQL products. See #David-W-Fenton's answer for more detail.
Bottom line: You will need to issue a Connection.Execute for each CREATE TABLE statement i.e. client side procedural code. But they can (perhaps should) all be run in the same transaction, of course.
ADO to MS Access does not support batch SQL statements. You need to run each statement as a separate execution.
People who think you can send multiple SQL statements to Jet in a batch just aren't thinking.
Jet is a file-server database engine -- there is no centralized server process controlling interaction between clients and the actual data store. Instead, clients are all running individual instances of Jet and cooperatively editing a file in a way that is controlled by the Jet locking file (LDB). Without a centralized process to serialize and prioritize the SQL statements, you wouldn't want Jet to be able to process multiple statements in a batch.
Those who are offering the suggestion of using ADO and separating the statements with a CrLf should code it up and give it a try and then get back to us about how useful their speculative advice actually is.
If you're sample set of commands is typical, just do something like this in VBA or the language of your choice:
public sub ExeuteBatch(BatchString as String)
var s as string
var abatch as array
sbatch = replace(sbatch, "\n", "")
abatch = split(BatchString, ";")
for each s in abatch
** adodb execute s here **
next s
end sub
That's off the top of my head, but you should be able to take it from there I hope.
Crude but it works - create the necessary number of queries with one SQL statement each, then use a Macro to run the queries successively. That's about as good as can be done with ADO/Jet.
I don't know if ADO is constructed over JET OleDB Engine, which I suppose, if it is this way, The Jet Engine doesn't support execution of multiple statements in one single batch, we tryed separating with ; and with the GO reserved word, but it does not work.
I think you can run multiple commands in one ADO Command.
You just need proper line feeds between then. i.e. \n doesn't work.
Try something like this:
(Using VB Syntaxish)
MyQuery = "Select * from Whatever " & vbLf <br>
MyQuery = MyString & "Select * from SomethingElse " & vbLF
oRecordset.Open(oDatabase.m_pConnection, MyQuery )