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TIMESTAMP :: Creation And Update Date


I want to create an auto creation date and update date in my mysql table. I am using the "MySQL Cookbook" approach, using the TIMESTAMP field which basically is:

- create 2 new fields in the table (t_create and t_update)
- both NULL
- when a new record is created they both will register a common timestamp
- when the record is modified the t_update will change, but not the t_create




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Related Forum Messages:
Set Date Creation
like to set the creation date of a table or the entry of new data with an old date.

Ex: I want that a table results created on 10th December 2000.

Or data wrote in table results old, wrote like 1 month ago.

I think I can do that by using the TIMESTAMP or something like this statement.

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Table Creation Date?
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In my table, there is a field which is a timestamp. Problemo here is whenever I update the other fields, this timestamp field always resets to now. So i lose the actual timestamp before the update.

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Update And Timestamp
mysql 4.1

UPDATE `table` SET `col1` = 'smth1', `col2` = 'smth2' WHERE `col3` ='smth3';

There is a TIMESTAMP field I want to preserve. Last update command turns all dates to 'NOW'. What do I have to add to keep original TIMESTAMP?

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Date Vs Timestamp
I have a somewhat large table (about 900,000 rows). I regularly need to run many queries against this table and it's is rather slow. Before making any major changes, I wanted to confirm whether the following changes would help.

Right now, I run a query like this:

SELECT count(*) FROM refer WHERE date >= '$date1' AND date <= '$date2'

However, "date" is actually of type timestamp. So I have an index on the field, but it has the same cardinality as the number of rows, as you might expect. I've also heard using a reserved word of 'date' can be a problem, but not sure if that's a performance issue.

I think I may occasionally still need this level of granularity for some things, but 99% of the time, I really only need the actual date for my SELECT statements. I'm thinking it might be best to create a field2 that is of type date and use that for the queries, with an index, and drop the index on field1 altogether.

The more I think about the more I'm convinced the way I'm doing it now is the reason it is so slow. Can someone please confirm my stupidity?

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Auto Update Timestamp
Here is my example:

I have 3 fields.

Field 1 is a unix timestamp which is 0000-00-00 00:00:00 by default.
Field 2 is a number integer which is 30 by default
Field 3 is a unix timestamp which is a random date by default

When Field 1 is populated or updated, I would like to add the value in Field 2 (30) as days to recreate Field 3 with a timestamp equal to Field 1, plus 30 days (or whatever is listed in Field 2)

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Timestamp - To Update When The Row Is Updated.
i would like to have a table with ( among other things ) a time stamp column that holds the time that the row was created.

this seemed easy enough by just executing
ALTER TABLE mytable ADD stampcolumn timestamp;

but the problem with this is that the time stamp updates for a given row any time that row is updated.

I would like to have a timestamp that just stays at its inital value of the row insertion time. is this possible? how?

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Timestamp :: Registration Date
As a newbie to MySQL and PHP, I have been able to set up MySQL as test server on my MacOS X and have also succeeded in connecting my test sites registration form to the proper table in MySQL.
Everything works fine except getting MySQL to insert the registration date/time automatically as a new record is posted. I have created two "Timestamp"-date columns - the first one for "Change date" and the second for "Registration date". According to what I can gather from reading, this should do the trick, but it doesn't. No date or time is inserted in the registration date field.
Can someone explain (in newbie terms) what I am doing wrong and what I should do to make it work? I want the registration date to be filled-in automatically in every new record and then stay unchanged even if other parts of the record are changed.

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Where The Date (timestamp) Is Greater Than Now
On my site I want to output all records in my database with two conditions

Where the date (timestamp) is greater than now but within the next 7 days?

Can anyone help? I've got a feeling I need to use interval, but not sure?

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UPDATE Changes Unreferenced TIMESTAMP Column
I have a table demo defined like this:

>>create table DEMO (ID BIGINT AUTO_INCREMENT PRIMARY KEY , TIMESTAMP TIMESTAMP, STATUS VARCHAR(10));

I insert a couple of values:
>> 1, 2007-08-31 10:10:10
>> 2, 2007-08-31 10:10:11
>> 3, 2007-08-31 10:10:12

Then I change the STATUS field with an UPDATE query, even the TIMESTAMP column changest to current_timestamp.

UPDATE demo SET status="hello" WHERE id=2;
>> 1, 2007-08-31 10:10:10
>> 2, 2007-08-31 09:06:45, hello
>> 3, 2007-08-31 10:10:12

I don't understand this behaviour. I havent references the TIMESTAMP column and hence expect it to be unmodified. Can it be that the TIMESTAMP has a DEFAULT_VALUE specification?

Probably not, because if I inser another column (DEFVAL INT DEFAULT 5) that colum does not change when updateing the STATUS field - only the TIMESTAMP does.

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Remove ON UPDATE For TIMESTAMP Column
I've got a table with a timestamp column that has ON UPDATE CURRENT_TIMESTAMP. I realise what I actually wanted was DEFAULT CURRENT_TIMESTAMP since most of the time I don't want an update to change the timestamp (only an insert). I can't figure out how I'm supposed to remove the ON UPDATE clause of the column.

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Update A Table In A Timestamp Field
I would like to update "field A" in a table in which "field B" is a timestamp. I would like to update all fields whose date is less than a given date. This is the command I was using to no avail:

UPDATE my_table SET
Field_A=50,
WHERE filed_B <= '2005-05-12 15:08:44';

MySQL is returning the following error:

#1064 - You have an error in your SQL syntax. Check the manual that corresponds to your MySQL server version for the right syntax to use near 'WHERE filed_B <= '2005-05-12 15:08:44'' at line 3

My Host is using MySQL 4.0.25. Can anyone point me in the right direction? What am I doing wrong?

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Timestamp Not Being Updated - Is My UPDATE Command Right?
PHP

mysql_query("UPDATE prv_msg SET date_read=now() AND confirm=&#391;' WHERE id='$userid'")or die (mysql_error());

I'm not getting an error message, but a time stamp is not being inserted into the date_read column

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Date And Unix Timestamp Comparison
i have a field in my database called 'release' that contains a date in the format YYYY-MM-DD, except its stored as text and not in the date format.

I need to exclude certain results from my query based on how recent it was released and im having a hard time.

ive been trying to use this...

SELECT title FROM products
WHERE release< FROM_UNIXTIME(unix_timestamp(now()) - 183*86400,'%Y-%m-%d') ;

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How To Get Just Date To Display In Field When Using TIMESTAMP?
I would like to capture the date and time in a field for each record. I know that using TIMESTAMP and default value of CURRENT_TIMESTAMP returns the full date and time but I only want the date displayed in my webpage table when displaying the records. Should I be using something else other than TIMESTAMP or is there some parameters I can use to do this?

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TIMESTAMP :: Query By Time And Date
I have a field in my table that holds a timestamp. Below is a pseudo-query to describe what I would like to do.

SELECT * FROM `mytable` WHERE `saved_date` <= `6/24/05 10:22:34 AM`

`saved_date` is the field holding a TIMESTAMP. If anyone could give me the query that would actually do what I am trying to do above,

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DATE / TIMESTAMP Default Values
im is having problems with auto inserting date in my table.

I dont know what is the default value i will set if column type to DATE. It was succesful though if is use the TIMESTAMP type in the column and is using CURRENT_TIMESTAMP as the dafault value. mysql automatically inserts the current date and time to the database everytime a new record is inserted. The problem with using TIMESTAMP is that i only want the date and not the additional time.

Is there a default value I can use for the DATE function instead of using TIMESTAMP? I already tried NOW(), CURDATE(), CURRENT_DATE() to no avail

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Select Where Date = Today Timestamp Field
I have data stored in mysql table with a field (date), the data stored inside the field (date) is timestamp, how can i select data from this table where date = today (Current Day) ?

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Transform Date To Mysql Timestamp Via CSV Import
I have a CSV file (from excel) with contains personal data, like names, adress, and birth date. The birth date is in this format yyyy-mm-dd. I would like to import this CSV file into my MYsql database with the "import CSV file" function that is build in PHPmyadmin.

The problem is that I need UNIX timestamps in my database, and not the date in yyy-mm-dd format. Code:

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Search MYSQL Date Column With Unix Timestamp?
I want to search for records that are ON or After a certain date in a column that uses MYSQL date form (yyyy-mm-dd) with a unix timestamp.

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How To Read Column Attributes Like ON UPDATE CURRENT TIMESTAMP Or UNSIGNED
I am trying to alter my tables from my database via an selfbuild frontend system. Everything is fine, except the following. When altering the columns/fields in my table, i can access almost all information with "SHOW FULL COLUMNS FROM tablename", but i can't get any information about the so called "Attributes" like:

- ON UPDATE CURRENT TIMESTAMP
- UNSIGNED ZEROFILL
- UNSIGNED
- BINARY

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Error #1293: There Can Be Only One TIMESTAMP Column With CURRENT_TIMESTAMP In DEFAULT Or ON UPDATE Clause
I am using MySQL 4.0/4.1 version. And I am trying to add two timestamp columns to a single table. The columns are insert_date and updat_date to capture the date/time the record was initially inserted as well as the date/time the record was last updated respectively.

When I try to set one column (insert_date) with a default value of CURRENT_TIMESTAMP and the other column (updat_date) with ON UPDATE CURRENT_TIMESTAMP, I end up getting the following error:

#1293 - Incorrect table definition; there can be only one TIMESTAMP column with CURRENT_TIMESTAMP in DEFAULT or ON UPDATE clause

Is there any way around this problem?

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Date/Time Field Update Only Date
I have a field(tmMessage) in a table, it's a date/time struct.
it looks like "2003-09-21 15:52:35"
All I want to do is change the date in this field.
I want the time to stay the same.

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Different Timestamps For Time Of Creation And Time Of Update
What is the syntax to be used in MySQL when you want one timestamp to be set when the record is created, and the other only when it is updated?

I tried something like that but got a syntax error.

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Update Date
I have added the date column ( column name is dolv ) in mysql as CHAR(10) as I needed the date in
mmddyyyy separated by mm/dd/yyyy. Now I want to have this column contain the date whenever the updation to that column is done.

Please advise as to how I can achieve this without losing the data I have already entered.

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Date Of The Last Update
Do you know if there is a function or query that shows me the date/time of the last update, insert or delete of a record in a certain database?

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UPDATE Date Of DATETIME
I have a datetime column. And for some random row of data, I want to change the date (but not the time) of the datetime column. How do I do this?

before: datetime = 2006/04/03 12:30:25

if I do:
UPDATE table SET DATE(datetime)='20060404' where id=whatever;

I get this: datetime = 2006/04/04 00:00:00

I also tried: UPDATE table SET DATE(datetime)='20060404'+TIME(datetime) where id=whatever;

but that seems to take the time and add it to the date instead of concatenate it or something.

Anyways, my point is, I'm trying to update the date and only the date for a datetime value without adjusting the time. I know there is some simple way to do this but I'm far from a MYSQL syntax expert.

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Get Last Update Date For A Database ?
What is the easiest way to find out the date / time when a specific database was last modified ? I want to automate my backup process so it only takes a backup if the database was changed. This is somewhat unusual application where the database is only changed sporadically.

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Update A Date Using A SUM(field)
I have been asked to come up with a way of updating a date field, so that it subtracts the total number of days. If there was only one record to add to the field then it would be a simple case of

DATE_SUB(m1.date_joined, INTERVAL p1.qual_days DAY)

but unfortunately, there can be more than one record in the second table, so I need something like

DATE_SUB(m1.date_joined, INTERVAL SUM(p1.qualdays) DAY)

but it won't work, even after I add in a GROUP BY statement at the end of the query, I get an error using GROUP BY.

I have now resorted to creating a temp table to dump all the calculations in there and then doing an update using the values but I'm trying to find out if there is a better way of doing it.

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Find Date And Time Of Last Update
I inherited a server running MySQL 4.* from a previous developer. Now,
the records on this database might be what I want, or they might just
be test data. I think my only chance of finding out if this is the real
thing is to find the date and time of the last insert into the
database.

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How To Update 860 Rows Date +1update
I am having trouble updating a field incrementally. I can update with any number, but how do you make each row 1 more than previous??

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How I Can Change My Timestamp(14) To = Timestamp(8)
I am trying to find out how I can change my timestamp(14) to = timestamp(8).

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Timestamp And Current_date/timestamp
Im stuck with a sql query.
Basically I have a db that stored a timestamp off everyone who has a successful login.
I want to be able to count all the people who have logged into today? How do I do that?

I thought the following would work but it didn't:

SELECT count(date) FROM nn_users_logs WHERE date = CURREN_TIMESTAMP

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DB Creation.
Taken this example for a web site (like eBay) Don't care about analyze, it's
just for the example.

- table article, is a general table containing the article description.
- table seller, all the datas about a seller.
- table announce, all the datas concerning an announce
- table bill, concerning the billing process

the entities:
- the seller may have 0 or N articles (0:n)
- the annouce has (and must have) only 1 article (1:1)
- the announce belong to 1 and must belong to 1 seller. (1:1)
- the article has (and must have) only 1 announce (1:1)
- every announce must have 1 or N bills (1:n)
- every bill belong (and must belong) to 1 announce (1:1)
- any other possible reference.

May somebody give me the script for creating this database with referential
integriry (MySql 4.0)

I've no tool to create this and don't know the syntax.

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4.0.15 Foreign Key Creation Bug?
The table creation script(at the end of this post) works fine on
4.0.1-alpha-win, but the foreign key constraints fail on 4.0.15-win. I
am starting the server with the same command for both versions:

mysqld-max-nt --console --transaction-isolation=SERIALIZABLE

In 4.0.15-win I can extract the following error after I run the table
creation script:

[test01] ERROR 1005: Can't create table '.ibdata#sql-a14_3.frm'
(errno: 150)

Also, the InnoDB status in 4.0.150-win shows:
------------------------
LATEST FOREIGN KEY ERROR
------------------------
030930 19:38:49 Error in foreign key constraint of table
ibdata/#sql-a14_3:
Cannot find an index in the referenced table where the
referenced columns appear as the first columns, or column types
in the table and the referenced table do not match for constraint:
FOREIGN KEY (contactInfo_fk) REFERENCES contact(pk) ON DELETE SET NULL
See http://www.innodb.com/ibman.html for correct foreign key
definition.

But the above is wrong. I DO have an index defined on the foreign key,
it IS the first column in the index, and their IS NO type mismatch.
Since this works on 4.0.1, I have to think this is a bug. I need a
working version of the server that supports transaction savepoints.
Any help appreciated!!

# Connection: test01
# Host: localhost
# Saved: 2003-09-29 18:16:42
#
CREATE TABLE orderjoin (
owner BIGINT,owned BIGINT
) TYPE=InnoDB;
CREATE TABLE orders (
pk BIGINT UNSIGNED AUTO_INCREMENT NOT N.....................................

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Format Creation
I have 2 tables:

Table1 contains (among other things):

ID Data1 Data2 Data3
1 aaa bbb ccc
2 ddd eee fff
3 ggg hhh iii

Table2 contains (among other things:

ID Key Value
1 20 zzz
1 30 yyy
1 40 xxx
2 20 www
2 30 vvv
2 40 uuu
3 20 ttt
3 30 sss
3 40 rrr

I need a query that returns:

ID Data1 Data2 Data3 Value Value Value
(Key=20) (Key=30) (Key=40)
1 aaa bbb ccc zzz yyy xxx
2 ddd eee fff www vvv uuu
3 ggg hhh iii ttt sss rrr

Any ideas?

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Mysql Creation
I have installed Fedora core 3 with mysql database.Now I am able to connect to mysql database.But I have to create user and table .How to go ahead

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Table Creation
I'm creating a table and would like to get the system date for my date column. How would I do this.
I tried to use date date SYSDATE with no luck.
Also when adding values to the DB, would I insert anything in this column or just leave it out like and auto increment column??

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Getting Time Of Row Creation
I have some rows in a table and I was wondering if it was possible to find out through some PHP or mysql function when that row was added. Unfortunately, the structure was not setup to have a time or date column with timestamps.

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Index Creation
im trying to create a couple indexes for some tables and keep getting errors with these ones.

CREATE UNIQUE INDEX IX_TBLADDRESS_PRI_UNQ ON TBLADDRESS
(CASE BISPRIM WHEN 1 THEN NOWNERI ELSE NULL
END ASC,
CASE BISPRIM WHEN 1 THEN SOWNERT ELSE NULL
END ASC);

CREATE INDEX IXDELEMAILQUEUE_MODIFIED ON TBLDELETEDEMAILQUEUE
(STR(DTIMEMO,'YYYYMMDD') ASC);

CREATE INDEX IXEMAIL_LOWER_EMAIL ON TBLEMAILADDRESS
(LOWER(SEMAILA) ASC);

CREATE UNIQUE INDEX IX_SCHOOLDOM_PRI_UNQ ON TBLSCHOOLDOMAIN
(CASE BISPRIM WHEN 1 THEN NSCHOOL ELSE NULL
END ASC);

CREATE UNIQUE INDEX IX_TBLSCHOOLSTATE_SCHOOLHEAD ON TBLSCHOOLSTATE
(CASE BISHEAD WHEN 1 THEN NSCHOOL3 ELSE NULL
END ASC, CASE BISHEAD WHEN 1 THEN SMODULE ELSE NULL
END ASC);

CREATE INDEX SPONSORTRAN_LOWER_EMAIL_IDX ON TBLSPONSORLOADTRANSACTION
(LOWER(SSPONSE) ASC);

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Foreign Key Creation
I'm creating a calendar scheduling system with PHP and MySQL to keep track of lessons. I have one form in which the user enters the information about the event that needs to be scheduled. Then I need three entries to be made in three different tables. What I have is one table that keeps track of the entries in the calendar. Then I have two more, one for how much the teacher needs to get paid as a result of the number of hours and the other is how much the student needs to pay based on the hours. The only problem is that I want the student and teacher paying tables to have the unique ID of the calendar entry to which the payments are associated.
So the problem is I can insert the entries into the calendar tables, and it will automatically create a unique ID for that entry, but then how can I take the ID for that entry and insert it into the two other tables. The best I could come up with is somehow query the last entry created but i'm not sure how, or even if that is a good way of doing it.

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How To Set Creation Time
I have one table which i only fill with data once in a while.
then i would truncate it and fill all data using INSERT INTO ... SELECT ...

but that would not reset the creation date. so i cant know how old the data is.

so i changed my scriot to drop the table and recreate it. but then the creation date is still the same. how can that be?
i tried FLUSH with no success.

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Sequence Creation
I am not able to create a sequence in MySql.. But its giving error.

Can any one pls tell me how can i do that?

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Creation Of A CMS With PHP & MySQL
I'm currently trying to produce a CMS through the use of PHP & mySQL, the idea of this CMS is to allow the content of the site to be updated from a external source, i.e. The Client. Code:

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Table Creation Sql
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I know that Mysql handles large database very well, but there is a project
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Table Creation Error
I'm getting a MySQL error creating my table (see image's below). I'm compltely puzzled, it looks fine to me!

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