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Updating data from one table to another

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To add new records to a database you use an append query, and to delete whole records from a database you use a delete query.Note: You cannot run an update query in a Web browser.If you want to run an update query in an Access Web database, you must first open the database by using Access. If you are using an Access web app, you can use data macros to update or change existing data in a set of records.As a best practice, there are two main steps that you must follow to create and run an update query: create a select query that identifies the records that you want to update, and then convert that query to an update query that you can run to update the records.I am think of the way without using cursor, script as below. I don't understand what's the problem.i am going to give u full overview of my problem. The software is available in different portion of the country for data entry and report generation etc. What about: create global temporary table gtt ( id int primary key, cnt int ) on commit delete rows / you'll add that ONCE, it'll become part of your schema forever....

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This article describes how to create and run an update query in an Access desktop database.

and these two requests happen at almost exactly the same time.

The total should now be 5 3 2 =request #1 reads product_current_quantity = 5 request #2 reads product_current_quantity = 5 (#1's update hasn't happened yet) request #1 adds its local "5" 3 and writes "8" request #2 has already read "5" also, so it writes 5 2 = Letting the database do the math, and not your application, avoids this, because even if the two updates arrive at exactly the same time, each one will atomically modify the column's value, and the final result will be correct.

Using cursor is ok, but it brings with a un-toleratable speed when operating on a large table. end loop End; It's working but taking a huge time/sometimes hang the computer. [email protected] update ( select upd.purchase_no u_pno, upd.amount u_a, 2 temp.purchase_no t_pno, temp.amount t_a 3 from upd, temp 4 where upd.urefitem = temp.urefitem ) 5 set u_pno = t_pno, u_a = t_a 6 / 635 rows updated. Is this time, 10 minutes for 12000 rows tables an acceptable (expected) time? Thanks Anandhi = b.cycle and b.site_id=44 and b.rel_cd in('code1','code2','code3') and b.groupid='123' 12,000 times?

Even the idea create a temporary table holding only primary key and Column b, and then apply cursor to it is slow. Would u please help me how can i faster my procedure.u have given information 9i it same for oracle8i & dev6i.please help me Thank u very much for ur kind update information is really nice and working very insert----same prolem. That means -- just using math here -- that we have 600 seconds, 12,000 queries to run, 12000/60 = 20, so we are doing 20 per second -- or each query is taking 0.05 cpu seconds to run. do anything 12,000 times and you might have a problem tho! this might be one of the rare times that a temp table can be useful.