I have a MySQL DB in which I store data about each user.
I would like to add a list of friends for each user. Should I create a table of friends for each user in the DB or is there a better way?
If I have a Parent and Child table in MySQL related by a foreign key, is it possible using a SQL statement to move certain rows from Parent and the related rows from Child into archive tables (e.g. Parent_Archive and Child_Archive) in an atomic manner?
i am using mysql database
i have a table called sales
its primary key is sales_id
-------------------------------------
sales_id | invoice_id |
-------------------------------------
1 | 147
2 | 148
3 | 150
for sales-id 3 the invoice is supposed to be 149. i want to know which numbers are missing from invoice_id (i start invoice_id is 147 and end invoice_id is 4497). The invoice_id had no relation with sales_id
is it possible to know which numbers are missing from invoice_id, using some queries??
Hello,
I backed up my db with mysqldump from phpMyAdmin. Using MySQL 5.0.22. Made no changes to database file. Import fails. Found many instances of extra spaces using notepad, but now cannot find any other such extraneous spaces. Error is 1064.
Any suggestions on how to import file properly?
Thanks.
I want to add 100 entry to users table numbers field, random characters length is 10, all entry should be unique as well. How can i achieve this using MYSQL query code ?
Or do i need to use PHP ?
Help me with code snippets please. Thanks.
i want to create a table :
products
which looks like
(these are columns name)
Id Name Category-id Description
now Category-id column gets the values from another table
category
which looks like
Id Name Description
now category.Id is used in products.Category-id
how to do this in mySQL
hey guys
i need to add a special text to all rows in my mysql table ,
how to add some text to the end of all rows' content in a table just for one field
i used this code :
UPDATE `blogs` SET `title`= `title`+ 'mytext';
but didnt work for me
Hi,
I'm trying to make a Tag cloud for every user in own page, I'm using PHP5 and Mysql, My table named "tags" and I want to make a array but in short way. The table like below,
The array can be like
for user1 array={[car,1],[cat,null],[pen,1],[dvd,1],[cd,null]}
Username totaltag tag1 tag2 tag3 tag4 tag5
admin 5 car cat pen dvd cd
user1 1 1 1
user2 1 2 12 1
user3 3 2 10 1
Hello,
I am trying to insert data into a mysql table from a csv file. I am using the infile sql command, but I am having trouble because the first column of the table is an id that is set as an auto increment field. what do I have to set my first column value to in order to get this to work, or can I do it at all?
Thanks
I have this mysql query:
SELECT *
FROM Customer c
JOIN eHRDemographic ehD ON ehD.CxID = c.CustomerID
JOIN CustPrimaryWeight cpW ON cpW.CxID = c.CustomerID
WHERE c.CustomerID =22703
GROUP BY c.CustomerID
ORDER BY cpW.CustPrimaryWeightID DESC
This doesn't really work correctly as the CustPrimaryWeight table has multiple enteries and it's simply joining the first entry and not the more recent one as the ORDER statement doesn't seem to do anything.
Any ideas?
dear all,
i want to fire a trigger after my table has been filled woth reords ,i dont want to fire a rowwise trigger.please tell how can we do that in mysql.
I try in a test version of DBArtisan to set up a datasource and register
both servere as localhost, database to use, my username and password,
but, when testing the connection, I get message that connection failed.
Hooking up from eg. Delphi and other utilities run nicely. But not
DBArtisan,
Is MySQL 5.0 not supported yet ??
Or is it WAMP that is the culprit naming the service wampmysqld insted of just mysqld ??
I've created a salt using; md5(rand(0,10000000)); (there is probably a better way?)
There doesn't seem to be possible to make a text field unique in MYSQL. So how do I check if the salt has already been used for a previous user?
Or should I generate the salt based on the current date/time? as it is impossible for 2 users to register at exactly the same time correct?
I'm running program at apache tomcat server, that should be on permanently, but every morning(the client part isn't accessible at night) i receive error message (in apache tomcat console) that MySQL server is off. So is there any way to prevent this?
Thanks in advance!
UPDATE polls_options SET `votes`=`votes`+1, `percent`=ROUND((`votes`+1) / (SELECT voters FROM polls WHERE poll_id=? LIMIT 1) * 100,1)
WHERE option_id=?
AND poll_id=?
Don't have table data yet, to test it properly. :)
And by the way, in what type % integers should be stored in database?
Thanks for the help!
I have a mysql query where a subquery is:
BETWEEN '5.00' AND '10.00'
And this returns no results.
However when I use Floats or Ints:
BETWEEN 5 and 10
it works
The BETWEEN query also works for other values AS strings, but just not for 5 and 10.
EG:
BETWEEN '4' AND '5'
works.
How could this be?
I am torn between postgreSQL and MySQL but I am forced to install the choosen one on windows. I especially need asp.net membership and i will be installing NHibernate as well.
i need to connect mysql server from other new server, the IP address of the new server is in UK. please reply me is there any possibility to connect the new one?
Hi,
here is the "msg" table on mysql
sent_to customer msg read
------- -------- ------ -----
45 3 bla 0
34 4 bla 1
34 6 bla 0
45 3 bla 0
56 7 bla 1
45 8 bla 0
for example user whose id number is 45 logs in,
i want him to see this,
you have 2 unread msg to your "number 3" customer
you have 1 unread msg to your "number 8" customer
like a news feed
what query should i use for this ?
thx
I am building a PHP and MySQL search as so
SELECT * FROM Properties WHERE Locaion = 'Liverpool'
I want to count how many of each property type there are and display them at the side of the page to use as filters (like Rightmove.co.uk).
This is what I am have come up with but can't get it to work
SELECT *,
count(PropertyType = 'house') AS HouesTotal,
count(PropertyType = 'Apartment') AS ApartmentTotal
FROM Properties WHERE Location = 'Liverpool'
Can anyone help?
I am using mysql and there are bulk inserts that goes on to my table.
My doubt is if I create a trigger specifying after insert, then the trigger will get activated for every insert after, which I do not want to happen.
Is there any way to activate a trigger after all the bulk inserts are completed?
Any advice?
Thanks.
How to connect to MYSQL DB from Java, create table, insert data, retrieve it with datatypes.
How to make use of the data to/from in Flex application.
plz help me out..
i have basic knowledge in sending and receiving messages using BlazeDS.
and calling JAVA METHODS USING ...