by: Ken |
last post by:
Dear all,
I have a beginner of oracle and recently I have a prob with using
indexes. I have a table with 5 columns, with no primary key set in the
table. An index has created for column 1. I...
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by: Adam |
last post by:
In my MYISAM table I have an index (Index_A) on 2 fields (Field_A,
Field_B). There are millions of rows in the table. The cardinality of
Index_A is 53. I think a query to count the number of rows...
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by: Angus Comber |
last post by:
Hello
I want to create a lookup table where I can store string keys:
For example:
192.168.0.1 -> Purple
192.168.0.2 -> Blue
192.168.0.3 -> Red
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by: Pavel Stehule |
last post by:
Hello,
Pg make query 1. and 2. very fast (use index), but for query 3. dont use
index. I can solve its using select union, but I readed so pg 7.5 don't
problem with OR operator. I use cvs pg. I...
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by: ruben |
last post by:
Hi:
I'm running a large database on PostgreSQL 7.1.3. 20 days ago the
database failed with a threatening and not too descriptive error like:
pg_exec() query failed: server closed the...
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by: bobby_b_ |
last post by:
I have a table where fields 1 and 2 make up the primary key.
Because of this, I have a unique composite index on fields 1 and 2 (as
required by DB2). Now my question is: Fields 1 and 2 are also...
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by: GCM |
last post by:
Hi,
I have a table that has the following fields; LName, FName and MName. Also
there are other fields in the table. I need to create another table with
those fields combined as "Trim( & " " & &...
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by: Yi Xing |
last post by:
Hi,
I need to read specific lines of huge text files. Each time, I know
exactly which line(s) I want to read. readlines() or readline() in a
loop is just too slow. Since different lines have...
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by: shira |
last post by:
I have done a fair bit of searching, but haven't yet been able to find
an explanation as to why one would set "ignore nulls" to "yes" when
creating an index. I understand what it does (I think),...
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by: DolphinDB |
last post by:
Tired of spending countless mintues downsampling your data? Look no further!
In this article, you’ll learn how to efficiently downsample 6.48 billion high-frequency records to 61 million...
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by: ryjfgjl |
last post by:
ExcelToDatabase: batch import excel into database automatically...
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by: isladogs |
last post by:
The next Access Europe meeting will be on Wednesday 6 Mar 2024 starting at 18:00 UK time (6PM UTC) and finishing at about 19:15 (7.15PM).
In this month's session, we are pleased to welcome back...
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by: Vimpel783 |
last post by:
Hello!
Guys, I found this code on the Internet, but I need to modify it a little. It works well, the problem is this: Data is sent from only one cell, in this case B5, but it is necessary that data...
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by: jfyes |
last post by:
As a hardware engineer, after seeing that CEIWEI recently released a new tool for Modbus RTU Over TCP/UDP filtering and monitoring, I actively went to its official website to take a look. It turned...
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by: ArrayDB |
last post by:
The error message I've encountered is; ERROR:root:Error generating model response: exception: access violation writing 0x0000000000005140, which seems to be indicative of an access violation...
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by: PapaRatzi |
last post by:
Hello,
I am teaching myself MS Access forms design and Visual Basic. I've created a table to capture a list of Top 30 singles and forms to capture new entries. The final step is a form (unbound)...
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by: CloudSolutions |
last post by:
Introduction:
For many beginners and individual users, requiring a credit card and email registration may pose a barrier when starting to use cloud servers. However, some cloud server providers now...
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by: Defcon1945 |
last post by:
I'm trying to learn Python using Pycharm but import shutil doesn't work
|