March 2023 - users-list

[MonetDB-users] Books CDs
by CHARTS LICENSING 11 Aug '24

11 Aug '24

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Multi-column update based on joined table
by Lee Hachadoorian 11 Aug '24

11 Aug '24

I need to update multiple columns (~250) from one table to another based on a two-column key. In Postgres I would write this using the FROM clause, but since MonetDB doesn't support the FROM clause, I've successfully updated one column with: UPDATE census.acs2010_5yr SET b07401001 = ( SELECT CAST(b07401001 AS int) FROM acs2010_5yr.tmp_seq0001 WHERE acs2010_5yr.stusab = tmp_seq0001.stusab AND acs2010_5yr.logrecno = tmp_seq0001.logrecno ); My question is whether there is any benefit to writing a multiple column update into a single UPDATE statement: UPDATE target_table SET column1 = (SELECT column1 FROM source_table WHERE target_table.key = source_table.key), column2 = (SELECT column2 FROM source_table WHERE target_table.key = source_table.key), ..., columnN = (SELECT columnN FROM source_table WHERE target_table.key = source_table.key); On Postgres I believe the multi-column update using a table join would only have to do the sequential scan of each table once, but with the necessity of sub-selects in MonetDB, what is the backend doing? Is it already doing an index scan once for each row in the single column case, then doing it once for each row * column in the multi-column case? Best, --Lee -- Lee Hachadoorian Asst Professor of Geography, Dartmouth College http://freecity.commons.gc.cuny.edu/

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[MonetDB-users] XQuery API and XLink/XUpdate support
by Alexandra Mart�nez 27 Jun '24

27 Jun '24

Hello all, I was wondering if there is any documentation about the API for XQuery (i.e., how to write xqueries from a Java program). Also, I am interested in using some features of XLink and XUpdate on top of my XML database. Is support for any of these in progress? Thanks in advance, Alexandra ______________________________________________________ Click here to donate to the Hurricane Katrina relief effort. http://store.yahoo.com/redcross-donate3/

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[MonetDB-users] Proofreading your professional documents
by Richard Hounslow 24 Feb '24

24 Feb '24

Dear Professor/Lecturer Please excuse us for contacting you directly. We are offering an efficient service to help you ensure your academic and professional work is written in perfect English. We will check the grammar and style of your work and return it to you to meet your requirements and deadlines. Proof-Reading-Service.com can provide you with a professional proofreading service at a very reasonable rate. All our proofreaders are highly qualified native English speakers. Many work as leading academics in their fields and all have extensive experience of proofreading to the highest standards. If you are interested in our service, please take a look at our website: www.proof-reading-service.com All you have to do is send us your document as a word attachment with the deadline and we will guarantee delivery of a perfectly written document to give you complete confidence when you submit your work. The fee is worked out on a flat rate (£6.95 per thousand words or 0.695 pence per word), so you know exactly how much the proofreading will cost in advance. Once we have received your document(s) we will confirm the word count, the price and the deadline. If you have not heard from us within 2 hours during normal business hours after you have sent your work please resend it from a different email account or send the file to proofreadings(a)gmail.com. We look forward to hearing from you! Yours faithfully Proof-Reading-Service.com

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Possible BUG??
by Ariel Abadi 08 Mar '23

08 Mar '23

Hi All! I used to have a query that was working in a prior version (11.39.13), but now that I have upgraded to the newest version (11.45.13) this same query is not working any more. The query is the following: SELECT nrm_tim_date AS nrm_tim_date, ( (SELECT SUM(nrm_rse_amount_usd * exc.exc_rate) from sb_glob.exc_exchange exc where exc.exc_currency = 'USD') ) AS net_profit, SUM(nrm_rse_amount_usd) AS nrm_rse_amount_usd FROM sb_traf.cubm_202303 AS nrm GROUP BY nrm_tim_date The error Im having is "SQL Error [42000]: SELECT: subquery uses ungrouped column "nrm.nrm_rse_amount_usd" from outer query" This exact same query does work on version 11.39.13. Can someone help me with this? Thks a lot in advance ARIEL ABADI Direct: +54 11 5279.2054 Mobile: +54 9 11 6050.0101 *Email*: aabadi(a)starbi.com *Web*: www.starbi.com

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Announcement: New MonetDB JDBC driver and JdbcClient released
by Martin van Dinther 02 Mar '23

02 Mar '23

The MonetDB team at MonetDB Solutions BV is pleased to announce a bug fix release of the MonetDB JDBC driver (monetdb-jdbc-3.3.jre8.jar) and JdbcClient CLI program (jdbcclient.jre8.jar). Besides bug fixes the new release improves performance and compliance. For a list of all changes see: https://www.monetdb.org/downloads/Java/ChangeLog We recommend all users of MonetDB JDBC driver and JdbcClient program to download and use the latest jar files. The download location is: https://www.monetdb.org/downloads/Java/ For information and tips on using the MonetDB JDBC driver, read: https://www.monetdb.org/downloads/Java/release.txt For information on using the MonetDB JDBC driver to execute COPY INTO <table> FROM <file> ON CLIENT ... and/or COPY <SELECT query> INTO <file> ON CLIENT ... commands for fast client side CSV file data import and export, read: https://www.monetdb.org/downloads/Java/onclient.txt Reminder: since release monetdb-jdbc-3.0.jre8.jar the MonetDB JDBC Driver class name has been changed to: org.monetdb.jdbc.MonetDriver It used to be nl.cwi.monetdb.jdbc.MonetDriver which is marked as deprecated and will be removed in a future release. Please use the new driver class name asap in your configuration files/scripts and/or Java code.

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