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Using Time Functions Within A Query


I'm currently working on a script that searches through a database of restauarant information. One of the things it does is allow the user to search only for restaurants that are open at the time of the search, however i get errors when trying to implement this.

Here is the query im using:




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I have two fields in my database...

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How To Apply Php Or User-defined Functions Inside A Query
Instead of applying a php or user-defined function to data after fetching, I want to apply functions inside queries, not sure if this is possible.

This is how it's done with MySQL function:

SELECT
FROM_UNIXTIME(table_articles.article_pubdate, %M %d, %Y)
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Is it possible to replace FROM_UNIXTIME() with the php function date() ? so it's something like


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I just want to ask, how to get query time like this one:

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+--------+------------+
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Maybe some instruction using PHP?

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Time Query - Please Help?
I’m completely baffled by a query that I thought I had working yesterday, but I can’t get it working today.

Here’s the screnario:

I’m publishing a story to the web and I don’t won’t it to be published live until:

-The current date (type: date) is less or equal to now
-The current time (type: time) is less or equal to now

So here’s my query:

select * from cms_stories
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DESC LIMIT 1
Now the query works for the published_web_date, but not for the published_web_time. It seems to ignore that as you can see from the screenshot returned below from that query.


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Is it possible to limit the query time in MySQL (3.x or 4.0)? For
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Add Time Using A Select Query
Hello, how can I add, say, 2 hrs from a time in a database using a select query. I have searched the forums but cannot find an answer. Is it possible PHP Code:

 select 
date,
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I made a application in PHP, I have a table "control1" and this table have 85000 registries and Size is 200 MB, so when I try do a query in PHP, I have a error "exceeded run time", I changed the time but is the same, and after I connected by console, and I could see that the query take 14 minutes.

Here my sql:

$sql_filtro="SELECT COUNT(*) nFilas FROM control1 WHERE MATCH (contenido) AGAINST ('$q')";

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Do you know how to get the time that a query executes? Is there a formula on how to get it?

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How To Get Query Execution Time
How to get query execution time in "mysqlquery.log" files

I am using:

Linux 7.3
mysql 4.1

How to display the query execution time for each and every query in log files.
i have configured "slow-log-query" and "mysqlquery.log" in "my.cnf" is pasted below.

log = /var/lib/mysql/mysqlquery.log
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then i can get a output in "mysqlquery.log" like,

070830 9:24:29 2 Connect root@localhost on
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but i need to display the "timetaken of each end every executed query" along with the query in the above logfile like,

E.g:select category,listcategory from category_table order by category(0.03 secs).

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How To Get A Query Execution Time?
How to get a query execution time?

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Execute Time Of A Query
I'm running a SELECT * query on a table with over 3,000 rows. I need to know the execute time on the query.

PHPMyAdmin shows it to me, but because they automatically add a LIMIT 0, 30 I suspect the time is only for those 30 records. It also has a feature to prevent web server timeouts that prevents me from setting the LIMIT to 0, 3100.

BTW, I'm programming in PHP. Does the time to run the query get automatically passed when PHP sends the query to MySQL?

<? PHP
$Query = "select * from my_table where 1";
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Is there a way to retreive the elapsed time for the prevously executed query?

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I'm trying to pull dates from a db that are newer than 6 months old. I've been testing with 1 day, since there's nothing in the db that's older than 6 months.

query

PHP

$DATEsql = "SELECT DISTINCT DATE_FORMAT(time_in, '%m/%e/%Y') as time ";
$DATEsql .="FROM login ";
$DATEaql .="WHERE time_in > CURDATE() - INTERVAL 1 DAY ";
$DATEsql .="ORDER BY time DESC ";

that is giving me the same results as

PHP

$DATEsql = "SELECT DISTINCT DATE_FORMAT(time_in, '%m/%e/%Y') as time ";
$DATEsql .="FROM login ";
$DATEaql .="WHERE time_in < CURDATE() - INTERVAL 1 DAY ";
$DATEsql .="ORDER BY time DESC ";

This is what I'm interpreting as what I need to do according to the MySql manual.

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Query Execution Time In PHP Script
I am interested in displaying the query execution time as mysql does from the console, but using php. I've looked everywhere for this and can't find anything. Does anyone know how to display this information to the browser via php? The information must be there since the console provides it.

I checked the php function mysql_info(), but that only shows records, duplicates, deleted, matches, changed, warnings, etc. Didnt see any specific php function for getting execution time.

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When I do a query from MySQL Browser, it's providing information back in GMT.

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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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Query Execution Time & Mysql_stat
I am using mysql for my shopping site,Performance of site very slow then I used mysql_stat php function to find out how many slow queries,it shows 20.

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Query For A Specific Amount Of Time...
I was wondering if there was some possible way to display a mqsql query for an exact ammount of time?

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Query Total Execution Time
How to get total time taken by a query to execute....

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Average Query Execute Time???
I have a query taking about 4 sec that gets only 18 records.. That's not good. What can I do to speen up my Query?
<CFQUERY DATASOURCE="#datasource#" NAME="qry_job_search">
SELECT DISTINCT (t1.JobPostId), t1.Actionlkp, t1.Date,
tbl_job_posting.*,
tbl_job_post_requirements.*,
tbl_employer_info.*,
tbl_employer_url.*,
tblkp_employment_type.*,
tblkp_education_exp_lvl.*,
tblkp_salary_range.*,
tblkp_employment_exp_lvl.*,
tbl_job_post_location.*,
tbl_job_post_job_categories.JobCat,
tblkp_countries.*,
tblkp_prefectures.*
FROM tbl_job_post_history AS t1
JOIN tbl_job_post_location
ON tbl_job_post_location.JobPostID = t1.JobPostID
JOIN tblkp_countries
ON tbl_job_post_location.CC1 = tblkp_countries.CC1
JOIN tblkp_prefectures
ON tbl_job_post_location.CC1 = tblkp_prefectures.CC1
AND tbl_job_post_location.PrefectureID = tblkp_prefectures.ADM1
LEFT JOIN tbl_job_post_requirements
ON tbl_job_post_requirements.JobPostID = t1.JobPostID
LEFT OUTER JOIN tbl_job_post_job_categories
ON tbl_job_post_job_categories.JobPostID = t1.JobPostID
JOIN tbl_job_posting
ON tbl_job_posting.JobPostID = t1.JobPostID
JOIN tbl_employer_info
ON tbl_employer_info.UserID = tbl_job_posting.UserID
LEFT JOIN tbl_employer_url
ON tbl_employer_url.EmployerID = tbl_employer_info.EmployerID
JOIN tblkp_employment_type
ON tblkp_employment_type.ID = tbl_job_posting.EmploymentType
JOIN tblkp_education_exp_lvl
ON tblkp_education_exp_lvl.ID = tbl_job_posting.EducationExpType
JOIN tblkp_salary_range
ON tblkp_salary_range.ID = tbl_job_posting.Salarylkp
JOIN tblkp_employment_exp_lvl
ON tblkp_employment_exp_lvl.ID = tbl_job_posting.EmploymentExpType
WHERE t1.JobPostId NOT
IN (
SELECT DISTINCT (JobPostId)
FROM tbl_job_post_history
WHERE Actionlkp =4
AND date = (
SELECT MAX( date )
FROM tbl_job_post_history
WHERE JobPostId = t1.JobPostId )
AND JobPostID = t1.JobPostID
)
AND HistID = (
SELECT MAX( HistID )
FROM tbl_job_post_history
WHERE JobPostID = t1.JobPostId
AND Actionlkp =1
)
AND Date >= ( curdate( ) - INTERVAL 30 DAY )

<CFIF SESSION.COUNTRY_A NEQ "" AND SESSION.PREFECTURE_A EQ 0 AND SESSION.CITY_A EQ "">
AND tbl_job_post_location.CC1 = '#SESSION.COUNTRY_A#'
<CFELSEIF (SESSION.COUNTRY_A NEQ "" AND SESSION.PREFECTURE_A NEQ 0 AND SESSION.CITY_A EQ "") OR FORM.PREFECTURE NEQ 0>
AND tbl_job_post_location.CC1 = '#SESSION.COUNTRY_A#'
AND tbl_job_post_location.PrefectureID = '#SESSION.PREFECTURE_A#'
<CFELSEIF SESSION.COUNTRY_A NEQ "" AND SESSION.PREFECTURE_A NEQ 0 AND SESSION.CITY_A NEQ "">
AND tbl_job_post_location.CC1 = '#SESSION.COUNTRY_A#'
AND tbl_job_post_location.PrefectureID = '#SESSION.PREFECTURE_A#'
AND tbl_job_post_location.PostCity LIKE '%#SESSION.CITY_A#%'
</CFIF>
<CFIF (SESSION.CATEGORY_A NEQ 1) OR FORM.CATEGORY NEQ "">
AND tbl_job_post_job_categories.JobCat = '#SESSION.CATEGORY_A#'
</CFIF>
<CFIF (SESSION.KEYWORD NEQ "") OR FORM.KEYWORD NEQ "">
AND t1.Actionlkp = 1
AND (tbl_job_posting.JobTitle
LIKE '%#session.Keyword#%'
OR tbl_job_posting.JobDescription
LIKE '%#session.Keyword#%'
OR tbl_job_post_requirements.JobRequirements
LIKE '%#session.Keyword#%')
<CFIF SESSION.KEYWORD NEQ "" AND SESSION.PGV NEQ "brief">
<CFSET SESSION.PGV = "detailed">
</CFIF>
</CFIF>
<CFIF SESSION.EMP_TYPE_A NEQ 1>
AND tbl_job_posting.EmploymentType = '#SESSION.EMP_TYPE_A#'
</CFIF>
<CFIF SESSION.EXP_LVL_A NEQ 1>
AND tbl_job_posting.EmploymentExpType = '#SESSION.EXP_LVL_A#'
</CFIF>
<CFIF session.SRT EQ "D">
ORDER BY Date DESC
<CFELSEIF session.SRT EQ "C">
ORDER BY tbl_employer_info.CompanyName
<CFELSEIF session.SRT EQ "L">
<CFIF form.country NEQ 0>
<CFIF form.prefecture NEQ 0>
<CFIF form.city NEQ 0>
ORDER BY tbl_job_post_location.PostCity
</CFIF>
<CFELSE>
ORDER BY tblkp_prefectures.FullNameS, tbl_job_post_location.PostCity
</CFIF>
<CFELSE>
ORDER BY tblkp_countries.CC1, tblkp_prefectures.FullNameS, tbl_job_post_location.PostCity
</CFIF>
<CFELSEIF session.SRT EQ "T">
ORDER BY tbl_job_posting.JobTitle
</CFIF>
</CFQUERY>
Can anybody see a shortcut to get the same results??

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Comparing Dates Y, M, D , Time In Sql Query
ok.. ive finally got my nice little calender setup to output my dates

now

how do i query my database

for example ive got 2 variables
$startdate = 2006-1-1 00:00:01
$enddate = 2006-1-1 23:59:59

these represent the 1st and last second of the first of january 2006

i have a cell in my table (table called challenges) ( cell called time) that contains a date in the same format for each entry

how do i get all the entries between the start time and the end time..

can i use less than < and more than > as these are not really integar values

the column type is datetime but there is also another column of type datetime

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On my site I have a query that searches through 1,7 million. The php-file with the query takes a bit of time to load. Is it possible to show some sort of progress-bar during this time?

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Any Tips For Improving This Query Time?
Is there anything I can do to improve execution time for this query?

mysql> SELECT webpageUrl, webpageName, COUNT(*) AS `count` FROM _1_log GROUP BY webpageUrl ORDER BY `count` DESC LIMIT 5;
+---------------------------------------------------------+---------------------------------------------------------------+-------+
| webpageUrl | webpageName | count |
+---------------------------------------------------------+---------------------------------------------------------------+-------+
| http://www.w3counter.com/ | W3Counter - Free Web Counter, Web Stats, Live Analytics | 2490 |
| http://www.w3counter.com/stats/visitors/4071/day/1000/0 | Visitors Overview - www.pitbullmortgageschool.com/ | 1496 |
| http://www.w3counter.com/stats/4071/v_daily | W3Counter - Visitors by Date - www.pitbullmortgageschool.com/ | 1130 |
| http://www.w3counter.com/stats/ | Your Websites | 1124 |
| http://www.w3counter.com/stats/websites | W3Counter - Websites | 800 |
+---------------------------------------------------------+---------------------------------------------------------------+-------+
5 rows in set (0.88 sec)

mysql> explain SELECT webpageUrl, webpageName, COUNT(*) AS `count` FROM _1_log GROUP BY webpageUrl ORDER BY `count` DESC LIMIT 5;
+----+-------------+--------+------+---------------+------+---------+------+-------+---------------------------------+
| id | select_type | table | type | possible_keys | key | key_len | ref | rows | Extra |
+----+-------------+--------+------+---------------+------+---------+------+-------+---------------------------------+
| 1 | SIMPLE | _1_log | ALL | NULL | NULL | NULL | NULL | 29422 | Using temporary; Using filesort |
+----+-------------+--------+------+---------------+------+---------+------+-------+---------------------------------+
1 row in set (0.00 sec)
It averages 0.5-3 seconds throughout the day (it's run often enough that it shows up in my slow query log multiple times an hour for exceeding 1 second).

Adding a partial index on webpageUrl doesn't affect anything, and URLs can be quite long. Is there anything I can do to speed up that query? The table is updated too often to maintain separate url/count tables -- can't spare the resources.

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Looking For Query To Get Time Of Last Column Count Increase
Code:

id | time | units
------------------------------------
1 | 2009-01-06 06:52:32 | 50
1 | 2009-01-02 16:45:23 | 50
1 | 2009-01-02 09:12:16 | 40
1 | 2009-01-01 12:06:00 | 35
2 | 2009-01-04 14:52:30 | 259
2 | 2009-01-04 04:52:30 | 258
2 | 2009-01-03 18:00:01 | 258

I need to write a query that will, for each unique id, return the last time there was an increase in the "units" column. So for this data set, I want to see:

Code:

id | time
------------------------------------
1 | 2009-01-02 16:45:23
2 | 2009-01-04 14:52:30

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Time Out Message When Query Large Tables
I'm trying to get data from 6 large tables but the volume of data in each table is too large and even select * from one of them make the system stop. I have afew questions:

1-what can I do to avoid the system stop or time out message?

2- To use several tabels infomation should I use 'View' command or can I use other methods?

3-I need to create a new table and insert the result from query in it. If I use the "view" can I insert the result of the view in a table?

(I use postgresql).

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Many users uploaded their files to my mysql table through php script,
my table having the details of uploading time, file name, & uploader name.

i need to find the recent uploaded file for all uploaders.

i tried with this query,

select file_name,uploded_by,MAX(date_time) from upload group by uploded_by;

it is giving the recent time, but it is not giving the latest file, it is showing first uploaded file.

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Most of the pages execution time should not scale with the increase in users
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Measuring the page on my development machine (Duron 1.2, 768MB PC133, WinXP,
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One page I am currently getting 0.2-0.3 seconds. It uses phplib templates
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I do have a few nightmare pages for the regular users which execute 150+
queries (mixture of selects and updates).

Can anyone predict what will happen with 300+ users?

I am thinking max load being 20 regular users logged in with 2 users viewing
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The machine I am currently looking at is P4 2.4, 512DDR with Linux. Will
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Truncated Time Values Using TIMEDIFF With ORDER BY Query
I'm using the following query:

SELECT glider, timestamp, TIMEDIFF(timestamp, UTC_TIMESTAMP()) AS last_contact
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INNER JOIN
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AS tmp
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to calculate the amount of time that has elapsed since the last inserted timestamp for each glider. Everything works fine: ....

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* The code selects all the bookings for a range of time.
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We also notify people if there has been a cancellation

This has led to a situation where a few different people are trying to book the same session at the same time, and succeeding!
We've ended up with 5 sessions booked

In the course of 2 page requests this seems to happen:
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I should read up on that would be used to create a query which takes data formatted like the following: ....

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PHP/MySQL Sorting By Date & Time (using Non Military Time)
This is probably a simple issue but I have searched online and can't find an answer.

I am using PHP/MySQL and I guess the most intuitive would be to have three select boxes containing HOUR / MINUTE / AM,PM option. Then store the time into mysql using there functions so I can output the data sorting them all by date and time. All the examples I have seen are for military time only but I'm sure there has got to be a simple mysql function or php function that converts non military to military and a formatting function to display with the AM / PM. But I have not found it.


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May I know how to get records with interval of 1 hour in database where the posting time is in this format '2008-05-15 00:10:40'

I tried with this :

$query="SELECT date,name FROM message WHERE (timediff(date,NOW())<=CRUDATE() CURTIME())";

But is not working. May I know what is the correct way of doing it?

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What Is Execution Time Of A Query Based On? (was "a Mysql Question")
when selecting data from the database, does the time taken to retrieve it vary from 56k connections to T3 connections? or does it all depends ont he general server speed/amount of connections on the db?

im not sure if ive explained that in the best way for people to understand
but im sure someone will get what i mean

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Functions
I am developing applications using PHP and MySQL.

There are various functions in MySQL that is also implemented in PHP. Such
as date arithmetic, string, numeric, etc...

Do I get better performance if I do them in MySQL (or PHP) and why?

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Min Max Functions
I can't find documentation on this facet of max, min. Consider

id item category price
1 nail fastener 0.25
2 screw fastener 0.38
3 hammer tool 12.98
4 plier tool 6.99
5 level tool 27.99
7 anchor fastener 31.23
6 gum fastener 0.10

want to find max price in each category AND WHAT IT IS.

SELECT
id,
item,
category,
max(price) AS price
FROM
hardware
GROUP BY
category

Is the SELECT correct? Is the item and id returned for the price where it is MAX. It does not appear it works in all cases. Is there a way to put MAX in the where clause like:

WHERE
max(price) = price

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Using VB Functions In SQL
I have a field named "users" with a list of users:

0001-username1
0002-username2
0003-username3
0004-username4
0005-username5

and I want to sort the query by only the "username" half of it.
ie. (if RS = recordset) right(RS.fields("users"), len(RS.fields("users")) - 5)

what would be the SQL statement to get the desired results?

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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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This is something I need to do with one select. Here is my select:

SELECT SUM(value1) FROM mytable WHERE rec_time BETWEEN '00:00:00' AND
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or

SELECT SUM(value1) FROM mytable WHERE rec_time BETWEEN '00:00:00' AND
'00:30:00' AND YEAR(rec_date) = YEAR(NOW()) GROUP BY LEFT(rec_date,7)

rec_time = time
rec_date = date

As you can see, I'm collecting summary of daily record around midnight and
building an monthly array like: 0,0,0,6.5,0,23.7,2,0,0,5.5,0,0
BUT! my function call requires a constant-length list. So if any months in
my selection range have no data, I need to fill the space with an empy
value. How can I do this? Perhaps with an helper table, but how?

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Mysql 5 Functions
I downloaded mysql, I did rpm -e to take out the 3.22 from my box (
mandrake 9.x)
I put MySQL 5, because someone told me it supports at last functions..
If anybody knows, can someone tell me, whether I can make functions like
in sql server of microsoft or not?
I want to implement some basic statistical functions like mean ,
deviation e.t.c.
But what I found on net is about UDF and staff for compiling mysql again
for native code...
I didn't find much for functions...
some examples also for procedures didn;t work.

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Custom Functions
is there a way I can make custom functions in mysql?

I need a function that will
replace all
& with blank
all " with a blank
all > with a blank
all / with a blank
and a few more

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Date Functions
I've read the Data and Time functions docs and any other relevant docs that I could find, plus tried googling, but I don't see the kind of examples I'm looking for. Can anyone see whats wrong with this mysql query?
Code:

mysql> SELECT id, file, alias, MONTH(mydate) AS thismonth, DAY(mydate) AS thisday, YEAR(mydate) AS thisyear, catagory FROM news WHERE id=6;
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 '(mydate) AS thisday, YEAR(mydate) AS thisyear, catagory FROM ne

the following query works so I don't know why this one MONTH/DAY/YEAR one doesn't.

Code:

SELECT id, file, alias, DATE_FORMAT(mydate, '%m.%d.%y') AS newdate, catagory FROM news WHERE catagory = 'special' ORDER BY mydate DESC

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String Functions
Not sure if this is a MySql mistake, but it seems to be. I am trying to execute a query that returns all the records where the first 3 characters of the username are equal to "cd-". After many successive, frustrating combinations of different string formatting / comparison functions, I figure I need some help. Here is my code.

 $sql = "SELECT username, officer1, officer2 FROM login WHERE SUBSTR(username, 0, 2) = 'cd-'"; 

here is my error
Parse error: parse error, unexpected T_LNUMBER on line blah.. blah..

My questions are as follows...
1. I know the code doesn't work, but is this a legal use of the SUBSTR() function. If so... will it (hopefully not) modify the contents of username?
2. In a previous version of this code i used LIKE intstead of =, without the SUBSTR(). Can anyone explain to me how the 'wildcard' characters % _ work. The manual was vague at best.

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