So I have a VBA macro which I put together quite recently, and does an adequate job, if painfully slow. However, I have been told to port it to VB.net (various reasons, a main one being that the Software team don't want to be stuck supporting VBA macros if I move on).
A key part of the process in VBA was running a couple of lookups on another sheet in the same workbook.
The table in question is ~10,000 values, and looks something like:
Location | Ref-Code | Type
Aberdare | ABDARE | ST
I can put the columns in any order, but what I need to do is check that a value is found in Ref-Code, and if it is return Location and Type.
So, first sub-question: is SQLite the right tool for doing this? Would something else be more sensible for looking up values in a persistent, rarely-altered 10,000ish row table from VB.net?
If SQLite is the right tool, are there any good tutorials to take me through how to connect to and query an SQLite database in VB.Net? I haven't been able to find one yet.
Thanks in advance.
Why not just use an xml file to store the lookups. There are loads of easy ways to parse xml files in VB and this way you don't have to learn how to connect to SQLlite at all.
The xml file can also be maintained by someone who doesn't know anything about databases.
Related
I need a way to search my entire Oracle database for a column that contains the value 'Beef'. What I need is the column name and table name so I can complete my query. Beef is an animal feed type and it is a known value in my database. I just don't know where.....
Essentially, we have a very old very clunky application that I am using SQL data sets generated from Toad freeware to get around. The application shows us laboratory testing information for our companies. The catch is you can only look at one company's lab report at a time, and as a I said, it takes FOREVER. We have over 700 companies we regulate so this is not an option (oh and you can't copy any of the fields).
I have already generated a query that gets me 99% of the information I need until I realized I was missing one column value that for some unearthly reason isn't included with the other attributes of the lab samples. We have around 100 or so tables and many of them aren't even in use. It's a poorly organized database and I've tried manually going through it and simply cannot find the stupid column and I have no idea what it could be named (naming conventions here seem not to apply).
A monkey wrench is: although I've done a decent amount of SQL coding for my job I'm not in IT. My job hooked me up with a read-only access of our database so I could run reports for them etc, but I'm not in the IT section so I don't get write privileges. So a lot of solutions I see that use DDL aren't available to me.
I guess it might be relevant, it looks like we're running oraClient10g.
I've tried this code that I got from here: community.Oracle
but as you can see I don't get any results.
I also tried the one suggested here at stackOverflow, but got a litany of errors so I abandoned that pretty quick. (I figured it's because of my read-only privileges and or my version of Oracle).
Any help would be greatly appreciated.
I'm making my project for a-level computing and I reached a problem that im not sure how to solve. Im making something similar to a student information management system and I want a way to store a small list of students maybe 5 to 10 preferably in my program and make reference to them from all forms and so that if something is changed on one of the students maybe a piece of information, that these information is carried to the next form. My teacher has very little knowledge on programming and so im kind of stuck, i have no previous experience with databases or sql however if someone is willing to break it down ill be very grateful and ive got a good understanding of arrays. My deadline is the 10th of may so asap please, thanks
- kyle
If you prefer simplicity I would stick to a CSV file or XML. I found a website which an end-to-end tutorial on how to create the XML and add items (students) to it using VB.net as according to your tag. You need only after to read them from the file, but might just as well add new:
http://vb.net-informations.com/xml/how-to-xml-in-vb.net.htm
I would stick with XML (or CSV as preffered) as it is a text file basically so you can see and make changes directly if needed.
I suppose this is somewhat of an extension of the question asked here.
However, I believe the linked OP and my own reason for reading a file with SQL Developer are different. I am learning SQL and databases and am attempting to create a model database (as in, I won't be editing the data after insertion, just set up search queries and what not). I want it to be large (over 100,000 entries), so I've created a C++ program that wrote randomly generate entries for the database on a .txt file (one entry per line in the .txt file) instead of hard coding the insertion of each entry. Now what I want to do is read the .txt file in SQL Developer and inserts it into a table.
My problem lies in the fact that I am not able to create directories. I am using a university oracle connection and I do not have the privileges to actually make a directory so that I can use UTL_FILE on my .txt file as was answered in the linked question. Assuming there is no way for me to gain this permission, is there an alternate way I can accomplish reading a .txt file for data for my table? Is there a better way to go about creating "dummy data" for my database?
What I ended up doing to insert my mock data was change the way the .txt file was formatted. Instead of having my C++ code write the data one entry per row, I actually made the code so that it wrote SQL code to the .txt file as I think #toddlermenot was suggesting, more or less. After I had the C++ code write as many inserts-with-mock-entries as I needed to the text file, I just copy/pasted it to SQL developer and achieved the desired results.
My problem is a classic case of making the process more complicated than it needed to be.
Also, even though I did not use the method,#Multisync provided an interesting way to go about achieving my goal. I had no idea SQL had the tools for me to generate mock data. Thanks for introducing me to that.
Why excel? Well excel is what is used to import the player salaries.
Now I need the spreadsheet to do the following.
Create teams within salary cap.
Include/exclude specific player function
Build multiple lineups from a selected list of players within the cap
Can I do all of this with excel? or do I need to know excel vba as well?
Also which parts of excel or if necessary excel vba must I need to know to code such a thing? Also if someone could give me a short summary of the steps needed to hypothetically make such a thing it would be great. Thanks.
I'm posting this as a reply because it is too long for a comment window.
Just because Excel has a grid doesn't mean that it is fit for data storage and data handling, on the contrary.
What you typically want to do is create a transparent structure that guarantees the integrity of your data and that allows dynamic portability when needed one day.
Excel is meant to be a spreadsheet, people forget this all the time or they just avoid the topic: although Excel has a grid, doesn't mean that it is a good fit for reliable data storage. It is not even the least complex way of storing data, depending on the amount of VBA that you need to manage all these data and the gates that you unnecessarily open towards potential bugs.
This is why an RDBMS is what will fit your needs, in this case Access would be a good option as it preserves your data integrity if you get the table structure right and it executes a lot of tasks for you that you should otherwise need to program yourself to protect the integrity of your data.
Although you can perform SQL on spreadsheets too, note that Excel does NOT cover related tables (what you typically seem to need for building your teams and salary limits), so what many Excel programmers will typically do is to create their own code to make this cross-table data storage thing work.
Don't do this if the alternative is available and much more reliable and future-proof.
At first sight, it seems that you won't even need any VBA; I'm not sure of all the things you want to do, but my first impression is that you can manage everything with SQL syntax and stored queries in MS Access. You can import Excel sheets into Access if you get their format right so that should not be a problem.
Once your data is stored there, rest assured that you have made your life a lot easier.
I need some sort of starting point for the following task:
Some kind of script should watch a certain folder for incoming excel files. These excel files all have a worksheet with an equal name. The script should then take a certain range of columns of each excel file run down all the rows and write the column data to a running Microsoft SQL Server table.
Now I don't know what scripting language I should/could use for this task. Maybe perl or windows power shell?
Hope you can point me to the right direction.
UPDATE: shouldn't I also look into SSIS since this seems to offer quite a lot of features?
Thank you.
You can create a Windows Service that can monitor a certain folder for a certain interval (say 10 minutes) using .Net.
Using ADO.Net, you can connect to both Excel workbooks and SQL sever perform SQL style data transformations. If the Excel doc isn't conducive to performing SQL queries, there's alway MS Office interop to interface with Excel to select specific values of cells (this tends to be more difficult than the former).
I would probably write a script in Perl or Python trying to call the file in the folder, and if successful, parse the data into either dictionaries/hashes (would be really easy to break rows and columns into a hash), or arrays, making it easy to write to a database.
Then (my knowledge is better in Python, sorry) use the PyODBC module, or whatever other module is necessary to connect to the server, and start writing. I am sorry if this is not as helpful, I am a beginner.