by: hemal |
last post by:
I came across a very strange situation at work. There is an order of
magnitude difference in execution time for the following two queries
(10 v/s ~130 msec):
select count(*) from table_name...
|
by: Philip Yale |
last post by:
I'm very puzzled by the choice of NC index being made by the optimizer
in this example. I don't actually think it should use an NC index at
all.
I have:
Table: CustomerStatus_T
Single data...
|
by: Peter Arrenbrecht |
last post by:
Hi all
We ran into a very annoying optimizer problem recently. We had added a
new key and self-join relation to a large production table. That key
will be filled very rarely and having just...
|
by: Andrea |
last post by:
Hi,
I've read the former postings but was not able to solve my problem:
I have a Summary Table (or MQT as you like it) and the query optimizer
does not seem to use the summary table.
I run...
|
by: www.felesh.tk |
last post by:
i want a html broser with c#
i like to know how i can make a html optimizer with c#
if u have a sample code for me i become glad
i am waiting forr...
|
by: Kevin |
last post by:
Using a base table, a MQT table was created. With optimization - when
querying the base table with calcuation that are already completed in
the MQT - I would assume the optimizer would use the MQT...
|
by: boa sema |
last post by:
Way back when, and at least in version 7 IIRC, the query optimizer gave
up when the where clause in a statement contained more than 4 search
conditions.
Does anyone know if such a limitation...
|
by: aj |
last post by:
DB2 LUW v8.2 FP 14 RHAS 2.1
Sorry if these are newbie questions. Optimizer stuff is black magic
to me. For both of these, assume stats are current and an even
distribution of data....
|
by: P. Adhia |
last post by:
Hi,
Consider the following query
select *
from t1
where c1 = ?
and c2 = ?
|
by: taylorcarr |
last post by:
A Canon printer is a smart device known for being advanced, efficient, and reliable. It is designed for home, office, and hybrid workspace use and can also be used for a variety of purposes. However,...
|
by: Charles Arthur |
last post by:
How do i turn on java script on a villaon, callus and itel keypad mobile phone
|
by: ryjfgjl |
last post by:
If we have dozens or hundreds of excel to import into the database, if we use the excel import function provided by database editors such as navicat, it will be extremely tedious and time-consuming...
|
by: ryjfgjl |
last post by:
In our work, we often receive Excel tables with data in the same format. If we want to analyze these data, it can be difficult to analyze them because the data is spread across multiple Excel files...
|
by: emmanuelkatto |
last post by:
Hi All, I am Emmanuel katto from Uganda. I want to ask what challenges you've faced while migrating a website to cloud.
Please let me know.
Thanks!
Emmanuel
|
by: BarryA |
last post by:
What are the essential steps and strategies outlined in the Data Structures and Algorithms (DSA) roadmap for aspiring data scientists? How can individuals effectively utilize this roadmap to progress...
|
by: nemocccc |
last post by:
hello, everyone, I want to develop a software for my android phone for daily needs, any suggestions?
|
by: Sonnysonu |
last post by:
This is the data of csv file
1 2 3
1 2 3
1 2 3
1 2 3
2 3
2 3
3
the lengths should be different i have to store the data by column-wise with in the specific length.
suppose the i have to...
|
by: Hystou |
last post by:
There are some requirements for setting up RAID:
1. The motherboard and BIOS support RAID configuration.
2. The motherboard has 2 or more available SATA protocol SSD/HDD slots (including MSATA, M.2...
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