by: lawrence |
last post by:
Google can't find me a good example of how to use the "if exists"
syntax in MySql. Is it right that to use it this way:
INSERT INTO IF EXISTS tMyTable VALUES("xxlk", "lkjlkjlkjljk")
I want...
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by: Jonathan |
last post by:
I am looking for a simple way to check if a database table exists. I
keep getting advice to use "Try.. Catch" and other error handling
methods, but I obviously don't want to have to display an...
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by: Trev |
last post by:
Which is more efficient:
Select * from table1 where id in (select id from table2)
or
Select * from table1 where exists(select * from table2 where
table2.id=table1.id)
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by: Geiregat Jonas |
last post by:
is using
if(open("file",O_EXCL) != -1){ printf("File does
exists")}else{printf("file does not exists"); }
a good way of checking if a file exists or not, if not how should I do it ?
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by: Dan |
last post by:
I have code like the following to test for existence of a file. I know the
file is there, but File.Exists returns FALSE. The problem appears to be
that the file is in a directory beneath "My...
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by: Zeno Lee |
last post by:
I'm using File.Exists to test a file on my C: drive.
My program was strongly named and had caspol -af run on it to allow it to
run from the network.
There are 3 ways I am doing this:
1) Run...
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by: Chris Fink |
last post by:
I am using the System.IO.File class to determine if a file exists on a
network share.
The File.Exists method keeps returning false, even though the file does
exist. The MSDN documentation...
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by: DEWright_CA |
last post by:
I am trying to see if a file exists in a virtual directory, and if so run a
method. I try doing File.Exists and the method runs but the file isn't there.
Is there a web version of File.Exists or...
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by: qwedster |
last post by:
Howdy folks!
I am using stored procedure to see if a value exists in database table and return 0 if exists or else -1, in the following SQL queries.
However how to check if a value (that is...
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by: ndedhia1 |
last post by:
Hi.
I am writing a java program in which I want to ftp a file to another unix box.
First I have to check if the directory exists in which I am ftping into and if it does not exist, I have to create...
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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,...
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by: Charles Arthur |
last post by:
How do i turn on java script on a villaon, callus and itel keypad mobile phone
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by: aa123db |
last post by:
Variable and constants
Use var or let for variables and const fror constants.
Var foo ='bar';
Let foo ='bar';const baz ='bar';
Functions
function $name$ ($parameters$) {
}
...
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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...
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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...
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by: nemocccc |
last post by:
hello, everyone, I want to develop a software for my android phone for daily needs, any suggestions?
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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...
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by: marktang |
last post by:
ONU (Optical Network Unit) is one of the key components for providing high-speed Internet services. Its primary function is to act as an endpoint device located at the user's premises. However,...
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by: jinu1996 |
last post by:
In today's digital age, having a compelling online presence is paramount for businesses aiming to thrive in a competitive landscape. At the heart of this digital strategy lies an intricately woven...
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