MySQL uses the USE database_name to change the active database. Does that work on all databases?
EDIT: By databases I mean DBMS. Thanks for bringing it to my attention.
Dear Folks,
I am trying to sort string column (containing numbers).
// SELECT `name` FROM `mytable` ORDER BY `name` ASC
+----------+
+-- name --+
+----------+
+-- a 1 ---+
+-- a 12 --+
+-- a 2 ---+
+-- a 3 ---+
You see natural sorting algorithm of Mysql is placing a 12 after a 1 (which is ok for most apps), But I have unique needs, so I want result should be sorted like this.
+----------+
+-- name --+
+----------+
+-- a 1 ---+
+-- a 2 ---+
+-- a 3 ---+
+-- a 12 --+
Is it possible with just SQL, or I have to manipulate result-set at application level?
Thanks for reading...
Hello my Dear friends!
Firstly sorry to my English I am not an expert:)
I am using freeradius 2.1.7 and MySQL instaled on Ubuntu server 9.04.
Now, the perl script called: "auth.pl" is verifying usersnames, passwords, and updating information.
The problem is that on a certain number of connections simply "NAS" - Mikrotik
until the next reboot users can not connect.
If you need i cann show you auth.pl script
hey, i want to format a date in mysql using
DATE_FORMAT(tblnews.datead, '%M %e, %Y, %l:%i%p')
i cant seem to get the quotes right , so i keep getting errors. how would you put this in a query?
I'm working in NetBeans 6.8 and I'm trying to create new connection using MySQL to an existing database. Does the .mdb file need to be in a specific location? It tells me that it cannot establish the connection.
Right now on my (beta) site i have a table called user data which stores name, hash(password), ipaddr, sessionkey, email and message number. Now i would like the user to have a profile description, signature, location (optional) and maybe other things. Should i have this in a separate mysql table? or should i share the table? and why?
Hi, I have a mysql table that I need to only contain 20 newest records before adding additional records.
New rows are added daily so I would like it first delete any records that are greater than the 20 allowed starting with the earliest.
The table contains an auto increment "id" column so I can easily determine which is the earliest records.
Thanks for any help.
Ok, so title says it all. Of course, I store all players' ip addresses in mysql and I can check if there is a person with the same ip address before he registers, but then, he can register to my page at school or wherever he wants. So, any suggestions?
Hi.
I'm about to develop a small web gallery, where it's supposed to be possible to upload several pictures at a time and then add some info abut the pictures.So I need a free java or flash local file browser that can pass me some info of the pictures that gets uploaded so that I can create some SQL entries for each picture.
The platform for the project will be PHP and MySQL.
Any good recommendations?
I have test_scores table with following fields:
Table schema:
id (number)
score1 (number)
score2 (number)
score3 (number)
score4 (number)
Sample data:
id score1 score2 score3 score4
1 10 05 30 50
2 05 15 10 00
3 25 10 05 15
Expected result set:
id col_name col_value
1 score4 50
2 score2 15
3 score1 25
What is a good SQL for this?(I am using MySQL.)
I am currently working with User objects -- each of which have many Goal objects. The Goal objects are not User specific, that is, Users can share the same Goal. I am attempting to fashion a way to calculate a "similarity percentage" between two Users... (i.e., taking into account how many Goals they share as well as how many Goals they do not share) Does anyone have experience with this type of situation? I am using Grails with Mysql if that is helpful.
Thanks
Is there a clean way of cloning a record in SQL that has an index(auto increment). I want to clone all the fields except the index. I currently have to enumerate every field, and use that in an insert select, and I would rather not explicitly list all of the fields, as they may change over time.
My server is currently based on us eastern time, and as I am in the UK, i need to move this forward 6 hours.
When using now() in mysql, i am getting the wrong time, is there anything i can add to now() to bring it forward 6 hours?
Thanks
I wish to change the primary key of a table, and also change the foreign key of the tables that reference it.
for example table employee has PK idEmployee = 1
table payroll has FK idEmployee = 1
I want to update employee to idEmployee = 2 and let the table payroll change FK idEmployee automatically.
is this posible in mysql?
thanks.
How would I go around creating a MYSQL table schema inspecting an Excel(or CSV) file.
Are there any ready Python libraries for the task?
Column headers would be sanitized to column names. Datatype would be estimated based on the contents of the spreadsheet column. When done, data would be loaded to the table.
I have an Excel file of ~200 columns that I want to start normalizing.
What is a better way to program the following SQL:
str_to_date(
concat(convert(D.DAY, CHAR(2)),
'-',
convert(M.MONTH, CHAR(2)),
'-',
convert(M.YEAR, CHAR(4))),
'%e-%m-%Y' ) as AMOUNT_DATE
I want to convert the columns D.DAY, M.MONTH, and M.YEAR to a date field using MySQL. The above works, but seems much more complicated than it needs to be. (If there's an ANSI SQL way to do it, that would be even better.)
Thank you!
I would to be a PHP/Mysql Programmer
what is the technologies that i must know ?
Like :-
Frameworks
IDEs
Template Engines
Ajax and Css Frameworks
please tell me the minimum requirements that i must know , and tell me your favourite things in the previous list ?
thanks
Why is it that you need to place columns you create yourself (for example "select 1 as number") after HAVING and not WHERE in MySQL?
And are there any downsides instead of doing "WHERE 1" (writing the whole definition instead of a column name)
Hello, I am working with php and mysql. I have one dropdown box where I am asking datatype of mysql field. Now, I want to put javascript validation for it. I am confused with the enum datatype. I am using regular expression /^[']{1}[^',^\\]+[']{1}$/. This is for one single value of enum values. It is working fine but issue is when I put single quote or backslash with backslash, it is valid but this regular expression shows it as invalid.
For eg, 'a'b' is invalid but 'a\'b' is valid.
For the first time, I'm creating a Java Swing application.
I'm using Windows Builder Pro in Eclipse, and a MySQL database (already setup up).
Let's say I have a combo box, and I want (for instance) all 'name' fields from a 'certain' table appear.
How can I setup that binding? I know how to programatically handle the connection and query code, what I would like to know is how to make that binding in Eclipse.
I use MySQL and it gives no meaningful error messages beyond "syntax wrong close to something or other". This is in sharp contrast to the sort of nice, clear error messages we are used to getting from java compiler and similar. So, are there RDBMS or sql validation tools that provide clearer, meaningful error messages?
sorry if this is a repeat, i looked around some and didnt find what i was after so here goes
SELECT * FROM trees WHERE trees.`title` LIKE '%elm%'
this works fine, but not if the tree is named Elm or ELM ect... how do i make sql case insensitive for this wild-card search?
again apologies if this is repeated.
oh, using MySql 5 on apache
Following is the command to fetch maximum salary form empsalary table in mysql
select max(salary) from empsalary;
but I want to fetch employee who got fourth highest from the list of employee.
I don't want to use trigger or function because I know there is direct command to fetch.