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4
votes
3answers
789 views

Working with a database

I just started to work with a database through Mathematica. I have a large data set. I use an .mx file to store my data. Now I have to store the data in a database, ...
2
votes
0answers
54 views

Random sample from sql database uniformly over time [closed]

I'd like to sample rows from a table uniformly over time, here is the naive way to do this: SELECT * FROM table ORDER BY RAND() LIMIT 10000 Unfortunately, ...
2
votes
1answer
56 views

Cloud Form Function Database

I am trying to build a web inventory application using a SQLite database hosted in the cloud home directory. I have a database in the home directory and I can query that database while in the code ...
4
votes
4answers
988 views

Connect to remote Ms-sql Database

I can connect to the local Database(installed in my system) from Mathematica via ...
3
votes
2answers
113 views

Importing crude oil prices from WolframAlpha

WolframAlpha has knowledge of crude oil prices, as a simple query will show. I am trying to obtain this data for use in Mathematica but I am not able to figure out the input. If I try ...
6
votes
1answer
125 views

Mathematica with MongoDB database

I try connect mathematica with my database NOSQL mongoDB but I have problem with create collection. I have Mathematica 10.2 and I download driver .net version 2.2 from this website a link! I unpacking ...
23
votes
5answers
2k views

Graph databases / Nosql with Mathematica

I am very new to mathematica but it looks like an interesting language and I would like to explore it for a future project to create a web search engine. It seems like it would be fairly well suited ...
3
votes
0answers
41 views

Mathematica 10.3 on Windows 10 Home Premium Connection to SQL Server 2016 [duplicate]

Having installed sql server 2016 evaluation copy. I have setup a sample database using sql server management studio. Typed the following in mathematica ...
1
vote
0answers
50 views

How can I connect database oracle with Mathematica

I try to connect to an Oracle database with Mathematica but I get this error: DBC::classnotfound: oracle.jdbc.driver.OracleDriver" My code: ...
0
votes
0answers
45 views

how to use a tree as a key to construct a table of key values

I have an interesting problem that I was able to summarize in the form of trees, sets, and key value pairs. I have the following sets of keys and values \begin{equation} \begin{aligned} k_0 &= ...
1
vote
0answers
78 views

Using Mathematica to connect to Cloudera Impala

I am trying to connect to Cloudera Impala via Mathematica, but so far I have not been able to do so. Has anyone ever done it? I have been able to connect to it via R using the JDBC or ODBC interface ...
94
votes
1answer
5k views

File-backed lists/variables for handling large data

Background Currently I am working with some large data (most of it generated by Mathematica itself). I usually find it a hassle to do this. For example, I just exported a large amount of data to ...
1
vote
0answers
76 views

Importing SQL view vs table

I am trying to import a SQL view not a table in Mathematica. The command: SQLSelect[conn, "DataByYear"] This will correctly bring in the table. However using the ...
1
vote
0answers
66 views

Awkward DatabaseLink JDBC Error [closed]

I've created a GUI application (a database editor) that uses DatabaseLink and it is currently working fine on my PC (M10.02, Windows 7) and on a clients's PC (CDF Player Pro 10.02, Windiws 8). While ...
1
vote
1answer
71 views

How to specify the number of precision digits for columns using DatabaseLink functions and options

Some databases (e.g. MySQL) does not store decimal places for seconds unless the number of digits needed is directly specified (e.g. DATETIME(4) for 4 digits) when creating the table in the database. ...
0
votes
0answers
72 views

Mathematica SQL command that counts records in table

Is there a DatabaseLink command other than SQLExecute that can be used to count the total records in a database table?
16
votes
2answers
3k views

How do you deal with very large datasets in Mathematica?

This question is in two related parts. The first is about dataset size, the second data wrangling. Part 1: I've built a naive Bayesian classifier on Mathematica. It uses ...
1
vote
0answers
137 views

I can create an H2 database with the H2 Console, but I can't find the database with MMA

I can create an H2(Server) database using the tool that H2 provides, but although i can create a memory based H2 database with the Database Explorer, when I try to create a connection to the ...
0
votes
0answers
67 views

Improve performance of processing transactions in a large file

I want to work with a table which has 296,705 transactionslines and 172,147 transactions. ...
11
votes
1answer
311 views

Slow work of SQLInsert with MS SQL Server in V10

This question is very similar to: Slow work of SQLInsert with SQLite, but for MS SQL Server. Unfortunately the use of SQLBeginTransaction and ...
9
votes
3answers
653 views

Slow work of SQLInsert with SQLite

I want to store my data in SQLite database, but writing large numbers of data its too slow. For example: ...
3
votes
1answer
181 views

How to Insert Multiples Rows in Database (SQL)

I want to insert a matrix into a database, preferably with syntax like this: ...
5
votes
1answer
312 views

How to update bundled SQLite library (or driver?) in V10 for OS X

I've been using undocumented Database functions with Mathematica V9 to acces my SQLite database, which is a Firefox-generated database that contains cookies. ...
4
votes
1answer
570 views
1
vote
1answer
489 views

How to check empty tables using SQL Select or Execute?

If[SQLExecute[con, "Select * from TABLE"] == "{}", Print["TRUE"], Print["FALSE"]] I need to know the way, if the TABLE is empty or not
1
vote
0answers
123 views

Datastream to Mathematica

I currently use data from Thomson Reuters Datastream. With an add-in in Excel, the data can be requested. Because I need to use the data in Mathematica, and I need to update the data frequently: Is it ...
2
votes
2answers
301 views
3
votes
0answers
781 views

Problem inserting data into a mysql table with column names having a space

I have a mysql table whose column name has space. I tried inserting the data into this column. I got an error I tried a sample code, which tests accessing the columns with a space and that returns ...
2
votes
1answer
264 views

MySQL or PostgreSQL? Using Mathematica only I need to choose one

Installing either MySQL or PostgreSQL. My concern is just with Mathematica. I am going to be using it to store a good bit of basic data but the main thing is fast image retrieval and comparison using ...
1
vote
1answer
145 views

OpenSQLConnection error

I used to be able to connect to a SQL Server database. I haven't run this program for a few months. I tried it today and it failed, so I went back to try OpenSQLConnection[] and got the following ...
3
votes
1answer
408 views

How can I connect database(MSSQL Server) with Mathematica?

Newly I started working with database(MSSQL Server 2012). by google help, I created Table name as EmployeesList and also ...
2
votes
0answers
221 views

Can Mathematica use a MySQL ODBC connector?

I have a MySQL database that I connect to using Mathematica and would like to distribute my Mathematica code to others. We already have ODBC DSNs setup on peoples machines using the MySQL ODBC ...
4
votes
1answer
178 views

How can I write image to MySQL database?

I have a database, such as: In Mathematica, the final code is: img1=Export["/home/user/Desktop/1.jpg",resultimg1]; I tried ...