MYSQL :: Two Timestamps For Update And Insert

Update Timestamps
Dumb question coming up. Are you able to update a timestamp. I created the table below and want to update the timestamp. I have tried different ways of doing this button can't get it to work. I can insert into the table and update any others columns.

create table answer (
questionid int unsigned not null,
answer char(1),
target char(1),
traffic float(2),
comment text,
username varchar(40),
time timestamp(4),
primary key (questionid, username, time)
);

UPDATE Or INSERT
Kind of worked myself into a weird place in my current application. Where I find myself at is with a single form that is supposed to handle both updates of existing rows and insertions of new rows. The way I want this to work is:
1) If the ID is specified and references a valid row, update that row
2) If the ID is specified but does not reference an existing row, insert a new row
3) If the ID is not specified, insert a new row

Now, (3) is easily done in my application - just test if the ID was specified by the user. Simple. Nothing to it.

What I'm wondering is if there is a way to do both (1) and (2) in a single MySQL query and receive feedback such that I can in my application inform the user whether an update or an insert took place. I could do this with two seperate queries (query for the ID; if I find the row update it, otherwise insert a new one), but I'd like to do it with a single one if possible (mostly because I want to expand my skills with complex SQL queries).

Update Or Insert Sql
I am using this query to update tableone based upon the values in tabletwo. I really like this query because it works very fast.

PHP

UPDATE tableone n, tabletwo c
   SET n.sec  = c.sec,
       n.cat = c.cat,
       n.published = 1
WHERE n.section = c.section
   AND n.category = c.category

This works great however I cant seem to get it to insert or append if the data already exists. It just overwrites the data.

My difficulty is that I need certain columns to be updated (overwriting the data) and other columns to be inserted or appeneded to (adding to the data).

Is a stored procedure the best way of doing this?

Or, is there a way of adapting my sql to cater for this?

Need To Use UPDATE Instead Of INSERT INTO
I need to UPDATE exisiting rows and populate
the fields using only the resources in this INSERT statement.

INSERT INTO cms.project_event (projectPhaseID,sortOrder) SELECT
cms.projectTemplate_eventTemplate.projectTemplatePhaseID,
cms.projectTemplate_eventTemplate.sortOrder
FROM cms.projectTemplate_eventTemplate WHERE
cms.projectTemplate_eventTemplate.projectTemplateID = '1'

Any clue pointing in the right direction will be of great help. Im not providing alot to go on just the to update the two fields from the other table instead of INSERTING new rows.

Last Update/insert
Can I know the time when the last UPDATE or INSERT occur in a table in a database?

UPDATE And INSERT In One Go?
Is it possible to create a query that will do an UPDATE or an INSERT depending on certain data already in the database?

Eg I'd like to record a user's vote. If this user hasn't voted already, an INSERT is called for, otherwise an UPDATE. Right now, I'm SELECTing first, checking whether the user's id is already in the votes table, and if yes, my query's an UPDATE, otherwise it's an INSERT.

This needs two hits on the DB however, and I'm someone who likes to limit the amount of DB hits as much as possible.

Update And/or Insert?
I'm using MySQL with PHP. I want to update a record if it already
exists. If it does not exist, I need to create a new record.

Is this done through a simple SQL command, or do I need to use PHP to
negotiate two separate UPDATE and INSERT statements?

After Insert, After Update
I am taking my first and last class in programming as I can't make sense of the textbook or teachers instruction (but I am determined to get at least an A or B in this class.) So if anyone could tell me in VERY simple terms how to write an after insert and after update trigger I would be very much grateful.

INSERT / UPDATE
I'm having trouble using the IF statement.
What I want is to do either a INSERT or a UPDATE depending on the SELECT statement.
No mather what i do, it gives me an error on the INSERT statement. Isn't allowed to have a INSERT/UPDATE statment inside a IF statement?

This is what i'm trying:

SET @param = (SELECT)

IF @param IS NULL THEN
INSERT...
ELSE
UPDATE...
END IF

INSERT Or UPDATE
I need using a SELECT statement, but is there a way to make this work on INSERT or UPDATE statements as well?

In other words, I can do:
SELECT MONTH(deadline) FROM projects ...

But can I do something like:
UPDATE projects SET MONTH(deadline)='11' ...
where the rest of the date stays the same, but only the month is updated?

Doesn't seem to work, and I don't see any examples in the manual comments, but it sure would be nifty.

Update Or Insert
I have to create a database with 8.000 entries.
It will be the top entries it will have. Now... what is faster ?
a) to create the table before with 8.000 rows and the id field from 1 to 8.000 (primary key...) and then do UPDATE's
b) to create the rows as they have to be created with INSERT's ?
In the middle of the process it will be SELECT's from other users.

Insert If I Can't Update
I check for the data to exist. If it does, I UPDATE, otherwise I INSERT. Is there a way to do it better, more efficiently?

UPDATE Or INSERT
I am looking for a solution to an update-type problem. Users enter name, address, etc etc. I have set the first_name & last_name fields to be jointly unique, so that no two records can exist with the same first and last names the same (e.g, no 2 records with 'Joe Bloggs' as first/last names.).
Now if users want to correct, say, their address, it will not allow them to since a record already exists with their first/last name.
Is there a SQL statement that will allow me to bypass the UNIQUEness constraints when other fields need to be updated?
(And related, if the UNIQUE fields are updated, it currently creates a new record but leaves the old one there. I need to overwrite the old record but keep the same ID number primary key.)

INSERT/UPDATE
I've got an array in PHP, which is identical to a row in mysql:

Code:

array
(
'key' => 'somekey',
'column1' => '...',
'column2' => '...',
'column3' => '...',
);

If 'somekey' does not exist in the table, I want to INSERT this array as a new row. Otherwise, I want to UPDATE the row which has the key 'somekey'.
Is it possible to do this in a single query? Cause now, I'm first INSERTing a row and if that fails, I try an UPDATE instead.

Insert/update
I have a table of x/y values and a set of 'new' x/y values.
For each of my new x values that already has a record in the table, I want to add the new y value to the corresponding existing y value.
If there is no x value in the table, I want to create a new record with the new x/y values.Is there a simple (atomic) way of doing this?

Timestamps
I want to make it so when a person is logged in but doesn't move for a while, they log out.

Timestamps
in my database i have to work with timestamps in unix-format like '20070101000000' for 2007-01-01 00:00:00.

Now i have to look for the summary of the difference of two timestamps. The single difference of the timestamps are between one minute and about 15 hours. Now i don't know how to manage the correct sumary that should give me how many days, minutes and so on are summed.

Using Between With Timestamps
iam trying to use a query so it presents all timestamps in the "between" condition using %.

e.g.

timestamps are in format
040206181748

select * from entries where mytimestamp between '04%' and '04%'

hopefully this should print all results for the year 2004, but for the query it returns an empty set, is there anything wrong?

Old Timestamps
just a short question: is there a way to force mysql-version 4.1 and above to use old style timestamps by default?I've got plenty of scripts using the old format and I don't want to go back to an old version of mysql ...I'm aware of SELECT Birthday+0 AS Birthday FROM ... but this would require changing all my scripts.

Timestamps
Just saw that I can create a TIMESTAMP field. My question is, with phpmyadmin, how would I create a timestamp field that automatically creates a timestamp only when the record is first created, i.e. the timestamp stays the same irrelevant of how many times the record was updated

Insert Or Update If Exist
what is the sql statement that can insert or update the record if it exist.

Update / Insert / Delete Log
I'm wondering if there is any way to get a lot of recent update/insert/delete statements performed on a db by a particular user?

Insert Then Update That Record
I'm using PHP to insert contact information in to a database. Confidentiality requirements have made the design change so that the private information be entered separately. I've modified Form 1 so that it contains the public information and added a button. The button does two things, it inserts the record in to the database then draws the private information form.

My question is, can mysql give me the last row inserted so I can pass that information on to the form and use it in my update query? I tried doing it by ID in that table but the id is not assigned until after the submit button is pressed. I can do another query but thought it would be slick to do it by row.

Insert On Duplicate Key Update
Is it possible so do something like this

"insert * from TempTabel on dublicate key update 'all fields'; "

So I don't have to write every column name. I need this, so I can use the same code on multible tabels. I could use replace, but then the foreign key in other tables are not updated.

If Exists Then Update, Otherwise Insert
provide a very simple if, then, else clause in MySQL?
If a customer named 'bob' is already in the database, I want to update his id. If he is not already in the database, I want to insert him.
What would be the best way to do this?
I get errors for the following:
IF EXISTS
(SELECT 1 FROM customers WHERE name = 'bob')
THEN
UPDATE customers
SET id = '007' WHERE name = 'bob';
ELSE
INSERT INTO customers(id, customer)
VALUES('007', 'bob');
END IF

Simple Insert And Update
Im having a rather irritating problem..because its so simple and I just cant figure it out.In my database I have some company info and the primary key "companyID" is used to reference it in several other tables.
however in phpmyadmin I cannot figure out how to set it to automatically generate when I create a new company in the company table and then propogate to all the tables it links too.

Unable To Update And Insert
I have a weird problem which is i able to access to the DB, able to do a select but unable to update and insert.
This is the scenario.
The existing running db is called as 'abc'. I dump it out and the i restore it as 'abcv2' and add in few column and insert value in. Then my application able to access the db. Able to do a select but unable to perform insert and update. No error is show in my application. Application wise i not the problem as it able to do so with others db.
I suspect is the privileges problem therefore i create a user and grant all access to that user. But the same thing as unable to update and insert.
Any idea of my problem? I think if i change the database name from a dump file won't cause this problem right.
What i can do now is i get the dump file then i open it with notepad and do the necessary changes. This is working fine but i would like to know what is the cause for this problem.

Insert Or Update Records
What's the best way to achieve this?
To simplify the problem, lets say I have a table with two columns, 'id' and 'value'.
Now, I want to pass an object through remoting (amfphp, irrelevant really but anyway) to either update existing rows or insert new ones.
The object I'm passing has corresponding fields, and if there is a match on the 'id' field then update it, if not insert a new row.
So I guess I need to first pull out all of the id's and compare them to the ones in my object, then seperate them up to ones that need updating, and ones that need inserting.
I can't quite see what the best way of doing this is. Either in code e.g. PHP or is there a MySQL statement to do it the quick way?

No Timestamps Working
I've tried just about every php/mysql combination out there in order to make this work, but even when it seems that it should work, it doesn't. It must be comparing strings or something, because I've tested the numbers, and the numbers themselves would have worked properly.

What I'm trying to do is create a "Who's Online" box for a forum. I've already created a timestamp record in my user table, and they're updated with NOW() whenever somebody navigates anywhere on the site.

I've tried to run this with many functions, and the most recently failed one is this:

$query = "SELECT recorda, recordb FROM usertable WHERE timestamp >= " . (date("YmdHi") - 10) . date("s");
$result = mysql_query($query);

...

Timestamps To DATETIME
I have a table that has a field that is a BIGINT and it contains unix timestamps. I want to convert them to the MySQL DATETIME format.
So I created a second field of DATETIME type and I want to run an UPDATE query that will take the value out of the first field convert in to insert into the second field.
Something like:Code:

UPDATE `table` SET `new_datatime` = UNIX_TO_DATETIME(`old_unixtimestamp`);

I don't know if a function like that (UNIX_TO_DATETIME) exists in MySQL.

Insert And Update Entire Table
My website will modify records on my products table. But I need to occasionally update their qty and their prices without losing any changes already made by other users online (like qty sold).

I'm able to do that now. It works really well:

Select, Update, Insert. Efficiently?
First, I want to say that I didn't design the databases and I wish I could fix them, but I can't.

There is a table, s01_Baskets, that tracks the users basket throughout my store.
There is a table s01_StoreKeys, that holds the next ID for every field used in tables. In this case I'm interested in is the basket_id.

What I need to do is create a new "basket" for a customer. To do this I need to select the key for this basket_id:

SELECT
s01_StoreKeys.maxvalue
FROM
s01_StoreKeys
WHERE
s01_StoreKeys.type = 'Baskets'
Then I can "create" a basket by inserting a row:

INSERT INTO
s01_Baskets
(
s01_Baskets.session_id
, s01_Baskets.cust_id
, s01_Baskets.basket_id
, s01_Baskets.order_id
, s01_Baskets.order_proc
, s01_Baskets.last_update
, s01_Baskets.ship_id
) VALUES (
'".session_id()."'
, Ɔ'
, Ɔ'
, Ɔ'
, Ɔ'
, '".microtime()."'
, Ɔ'
)";
Then I have to update that field for next key for the next basket.

UPDATE
s01_StoreKeys
SET
s01_StoreKeys.maxvalue = '".$basket_id+1."'
WHERE
s01_StoreKeys.type = 'Baskets'
UGH. I'm not thrilled doing it like this (one bad query, or if another process jumps in at the wrong time, I've messed up the baskets....)

Is there a better query for this? I'm pretty sure I can do the insert and select as one, but I need the basket_id(+1) for the update also. I don't know of any way to do all three queries in one. Can anyone see a better way to do this queries (ignore the poor design)?

Auto-increment And Update/insert
I have the following problem with a MySQL update/insert.

my problem lies in the fact that I have to insert a new row between 2 existing rows. the table is sorted by ID and has ID as auto-increment so I cannot insert a new row between 2 rows as inserting will assign the insert a new ID number...

I figured now I have to do an update and then loop till the end of the table and then do an insert at the end..

INSERT And UPDATE Similar Statements?
At least as I know it, INSERT goes like:

INSERT INTO table (Col1, Col2) VALUES('Hello', 'Goodbye')
While UPDATE goes like:

UPDATE table SET Col1 = 'Hello', Col2 = 'Goodbye'
Is there any way I could make them the same format, such as:

UPDATE table (Col1, Col2) VALUES('Hello', 'Goodbye')
?

Insert On Duplicate Key Update Question?
I have UNIQUE comp keys with 3 columns. I want to insert new rows if the data doesn't match one of the 3 columns. If they match, don't do anything. I am trying to do it with one query without doing select first and bunch of comparsion then either insert or update depending on the comparsion.

I am think of using this:
INSERT INTO mytable ('col1', 'col2', 'col3') VALUES ('mydata1', 'mydata2', 'mydata3') ON DUPLICATE KEY UPDATE col1=col1, col2=col2, col3=col3

is it going to work? I think it first tries to insert my data as a new rows if it is not duplicated. If duplicated, it will update the data with its old data. But update will ignore the operation since it's the same data.

Convert UPDATE Query To INSERT
I have an SQL dump file of a sql database that was generated with the UPDATE export type. The file contains code for generating the various tables inside the database along with the UPDATE lines for the table data.

Is there a way to process the dump file such that all of the UPDATE instructions are converted to INSERT instructions? I have to restore the database from scratch so there are no existing table rows to update.

Insert And Update In The Same Query (mySQL-3.23.58)
I am using mySQL-3.23.58 at my school. Since triggers are not available is there a way to do an insert and an update in one query?

Update / Insert Data Using CSV File
I need to update a field in my database using a CSV file. The database already has the Product Number (pNUM) and I need to add Wholesale Price (pWholesalePrice).

The file I have is fomatted as follows:

AC1074,48
AC1076,60
AC1076A,60
AC3515,60
AC3521,60
P1207,78
AC2300RH,42
etc...

I would need to do some sort of UPDATE that would find the product number and insert the corresponding wholesale price. I can't imagine this would be difficult if I knew what I was doing.

INSERT Or UPDATE Depending On Row Data....
I have a form that submits to a php script which in turn sends the data to a table in a mysql database.

$sql = "INSERT INTO scores (scoreid, xuser, xscore)
VALUES ('', '$_POST[xuser]', ('$_POST[xscore]'))";
$result = @mysql_query($sql,$connection) or die(mysql_error());
?>

This is the main section of that specific script at the moment. As can be seen, there are three fields, scoreid, xuser and xscore.

What i want to do is Insert a new users score as it is currently done so, HOWEVER, if the user already exists in the database then instead of a new tuple being entered for them, how can i do it so that their old tuple is overwriten/updated instead?

Update Record, Insert New If Doesn't Exist
I have a table that contains a list of parts used in a repair. The table contains foreign keys to the part and job concerned. it also contains data of time taken and status.

This data is read into a gui and the user can update the time taken and status. The user can also insert new parts in the gui.

is it possible to write an sql statement that will update the existing records and insert new ones if none already exist?

at the moment I'm having to try and update each record one, at a time and check the number of rows modified, if zero then insert a new record. all of which is done within the application. It works but doesn't seem very elogent...

INSERT / UPDATE A Row By Its Position In The Table?
Is there a way to insert or do an update of a row (aka record) by its position in the table, for example, the 5th row of the table? I know you can select data in such a manner, using the LIMIT 4,1 clause, for example. Does this work with insert/update as well, and if so, what's an example SQL syntax?

No Read Or Write Between INSERT And UPDATE
I am using mysql with the InnoDB engine. I wrote a perl script that
first selects something from a table, and then updates a second table
based on the select from the first table. I need to make sure that
there is no read or write to the tables while my script performs the
insert and update.

I looked at

http://dev.mysql.com/doc/refman/4.1/en/lock-tables.html

and it says this:

---------------------------------------------------------
If you are using a storage engine in MySQL that does not support
transactions, you must use LOCK TABLES if you want to ensure that no
other thread comes between a SELECT and an UPDATE. The example shown
here requires LOCK TABLES to execute safely:

LOCK TABLES trans READ, customer WRITE;
SELECT SUM(value) FROM trans WHERE customer_id=some_id;
UPDATE customer
SET total_value=sum_from_previous_statement
WHERE customer_id=some_id;
UNLOCK TABLES;

Without LOCK TABLES, it is possible that another thread might insert a
new row in the trans table between execution of the SELECT and UPDATE
statements.
---------------------------------------------------------

However, I am using InnoDB and it DOES support transaction. So, does
that mean that even if I don't lock my tables, it will still work? If
not, what do I need to do?

Selecting Between Dates With Different Timestamps
I'm in a bit of a mess here, trying to deal with some timestamp
issues.

I need to select items from a database with a datetime timestamp:

0000-00-00 00:00:00

I need to select these items based on several different criteria, for
which I will use separate select statements, but some of them are a
bit confusing.

I need to select items that are less than 24 hours old, between 24 and
48 hours old, between 3 to 5 days olf, between 6 to 10 days old,
between 11 to 30 days old, and items older than 30 days.

In the past when comparing times I have always converted the database
timestamp to Unix time, set a nowTime variable to current time in unix
time, and done the addition and subtraction. In this case, that
doesn't necessarily work, as I need to use "BETWEEN" in the
timestamps, and I'd really rather handle the separation of times with
the select statement than in the code.

Can anyone point me in the right direction, I'm not sure what the
select statement should look like.

Adding And Subtracting Timestamps
example database:

major_task---minor_task---userid---time--------action
-----------------------------------------------------
task1---------------------123------1234567891---200 (start1)
task2---------------------456------1234567899---200 (start1)
task1---------------------123------1234567999---210 (pause)
-------------task3--------789------1234569999---300 (start2)
task1---------------------123------1234599988---301 (resume)
task1---------------------123------1234599999---999 (end)

I need a way to total the time for task1. The difficult part is that most of the time user1 will begin task1 and user2 will begin task2 before the first user ends his task. The good news is each record has an action associated with it.

I need mysql to isolate a given taskid associated with a start action then find the next record with the same taskid associated with a stop action. Do the math and store the data in another table. Is this possible with mysql?

Error On Update Or Insert Data But No Message
I have an application on asp and mysql 5.0, connecting with ODBC 3,51. When the application insert data or update data, MySql don't send error message, but the data don't update or insert. The transaction is ignored!!!!. Then, on my application I can't detect error. My code:

set Command1 = Server.CreateObject("ADODB.Command")
Command1.ActiveConnection = MM_base_STRING
Command1.CommandText = "UPDATE EXAM SET MaAnt='"&MaAnt&"',Mois='"&Mois&"',Annee='"&Annee&"',[...]WHERE Id_Exam='"&id&"'"
Command1.CommandType = 1
Command1.CommandTimeout = 0
Command1.Prepared = true
Command1.Execute()

Have anybody an idea?

How To Insert And Update Multiple Values In One Record
How do I insert and update multiple values in one record. e.g.

1. How do I insert "dogs,cats, snakes" in one record
2. If I have "dogs, cats, snakes" in one record and I want to update it and add 'pigs' to make it "dogs, cats, snakes, pigs", how do I do that?

Truncate Tabel And Insert Data How To Update Indexes?
Once every day our financesystem updates data that I uses for my database. Some tables I truncate and reinsert data to get the latest changes in our customer and prospect database. Others I delete from a certain date to obtain best economical data and finally one database with 14M records I add records that has been added since the day before.

What I find is a very slow system and the funny part (but I think understandable) is that if I do not update for lets say a week (because I test stuff) the queries are fast and smooth.

That tells me that the problem is indexing.

So if I truncate a table, how to update indexes or can I do that at all?

The Optimize tabel doesn't help me here :(

I use MyISam and not InnoDB would that make any changes?

What about indexes are they needed (those I create)? or can MySQL handle that better?

Two Timestamps For Update And Insert

I need to record date updated which a timestamp does, but also the date inserted. Can I do this all from the mysql database, or do I need to have a variable date inserted in the php. The first option appeals to me more.