Setting A Maximum
I'm trying to get summaries of articles from my database, and I've tried a couple things though none of them seemed to be correct.
In my SELECT statement:
SELECT * FROM articles WHERE id=$_GET[id]
I want to specify how many characters(maximum) it should return. The field I want to limit is longtext and there are three other fields (2 varchars, and a date) but none go over 30.
I assume that this is possible since creating a separate field that contains a summary would be extra overhead.
View Complete Forum Thread with Replies
See Related Forum Messages: Follow the Links Below to View Complete Thread
Most Maximum
I have products table and products comments table, In products comments table fields are; 1) pro_comment_id - (INT) autoincrement , primary key 2) product_id -- id (INT) brought from products table. 3) comment -- TEXT 4) user_id --- (INT) User's id brought from user's table. if we have to extract the total comments for an particular product. then we can use "select count(pro_comment_id) from products_comments where product_id=16(suppose 16)"; But i want to extract the TOP 3 products having most comments with one sql query. We Can use MAX() function but i am not able to figure this out.
Maximum Value
Here is what my table looks like: CREATE TABLE `auction_features` ( `id` tinyint(32) NOT NULL auto_increment, `auction_id` tinyint(6) NOT NULL default '0', `fee_id` tinyint(6) NOT NULL default '0', PRIMARY KEY (`id`) ) TYPE=MyISAM; I can only store 127 rows because the 'id' field quits at 127. Earlier, this saved me because I used an insert query inside an infinite loop (this is the newbie forum right?!). But, now that I have the loop problem resolved I am needing to add more rows. What am I doing wrong?
Maximum Correspondence
I have a mysql Table (vorwahlen) with more than 600000 datasets (international telephone numbering plan). I want to look for the maximum Correspondence of one dataset with a string. Example: I have: 49305486452 Now the result of a query must bring me the following: Result: 4930 Which query do I need for this request??
Finding The Maximum Value
I tried to find the maximum value by using count and group by statement but the result is negative. how should i go about. Let say the data are empno | name 1 John 2 John 3 Jess select count(name) from employment group by empno The above SQL statement will give count(name) 2 1 But I want the value 2 only.
Maximum Range
maximum database in a server. maximum tables in a database. maximum rows in a table. I have known about there is 60000 tables and 50 millions record in a server. I use window XP sp_2 and mysql server 5.0.45. Can i store image and file, and process them with my web application.
Maximum Display
What is the benefit of specifying a maximum display width after a int, tinyint, bigint etc. For example if I specify a column as int(10), the column will still take 4 bytes of storage data. So what is the use of specifying (10), the Maximum Display Width.
Upload Maximum Photos
I'm currently building a site where my members can upload their photos. I want my members to be able to upload a maximum of 100 photos a day. What I am planning to do is the following: - create a field "counter" in the table "members" - when this field reaches 100, no more upload is possible - create a script that runs through cronjob that will automatically set all counter to zero at the beginning of the day (00:01 AM). But what if the script doesn't get runned? Then members can't upload their photos.
Maximum Rows In Table
I heard there's a max of about 65k rows not counting longtext and blobs in a mysql table How does longtext and blobs affect the max row count? And, what happens if you go over the max rows -- does the table auto-trim or does everything blow up? (Sorry... too scared to try myself )
Get Maximum Number From A Field
I would like to know if there is a way to retrieve the largest number in a group of records using a MySQL built-in function.
Maximum Query Update?
Is there a maximum amount of fields that you can update at once as run from php the following works: UPDATE `members` SET `firstname` = '$formfirstname', `surname` = '$formsurname', `usrlevel` = '$formusrlevel', `usrname` = '$formusrname', `grade` = '$formgrade', `phone` = '$formphone', `email` = '$formemail', `comments` = '$formcomments' WHERE `ID` = '1' LIMIT 1 ; Yet the following does not and it only has one extra field to update: UPDATE `members` SET `firstname` = '$formfirstname', `surname` = '$formsurname', `usrlevel` = '$formusrlevel', `usrname` = '$formusrname', `grade` = '$formgrade', `phone` = '$formphone', `email` = '$formemail', `drivingdate` = '$formdrivingdate' `comments` = '$formcomments' WHERE `ID` = '1' LIMIT 1 ;
Print The Maximum Number
i have a table with two fields: name and age. how would i get the name and the age of the oldest person in the table...same with the youngest...what about the average age?
Maximum Size For Longblob
i have a field as longblob and since longblob can take values upto 4Gb but my table shows the max of (Max: 2,048KB). im uploading files through this tables. i dont know how to upload files bigger than 2MB.
Maximum Value From A VARCHAR Field
I need a help on getting maximum value from a field, whose datatype is VARCHAR. The value in this field is Numeric, but its quite large. Is there a function that could be included in a query to do this operation? Or is there any other way to do this?
Maximum Length Of INSERT
If you use code in the style ofCODEINSERT INTO 'tablename' ('TOWN','COUNTY','POSTCODE') VALUES ('Arundel',West Sussex','AR'), ('Stroud','Glos','GL'), ... ... ('Wells','Somerset','WE');
Maximum Connections Exceeded
My MySQL server tells me that I have exceeded my maximum connections... How can I close those connections (I use a www.freedb.org-mysql-server) and I'm using Java for the connection and data-transfer
Find The Maximum Of The Sum Of Some Fields.
I want to select the biggest result which I get by adding the fields named "vote" with the same user_id. I thought of the following (but it didn't work out, unfortunately): SELECT max(sum(rating)) FROM votes WHERE user_id = $user_id Could anyone help me with this?
Maximum Number Of Rows
I am looking for information on the total number rows that can be used in an InnoDB,if there is even such a limit.I am not a DBA, so the information on mysql is a bit cryptic.
Maximum Column Length
Does anyone know what is the maximum column length for a table in a MySQL database? I was thinking of storing feedback in the form of text in the database. How feasible is this?
Maximum Column Length
Does anyone know what is the maximum column length for a table in a MySQL database? I was thinking of storing feedback in the form of text in the database. How feasible is this? Would appreciate any insights or suggestions.
Finding The Maximum In A Group
I have a database that stores stock data everyday. I am trying to create a query that finds the latest stock price. I've tried doing select stock.symbol, stock.price, max(stock.date) from stock group by symbol. However, it only finds the maximum date that a given stock was stored, not necessarily the other information stored in the corresponding row. I tried doing a join on the table with itself, but it keeps failing.
Maximum Records In MySQL
What is the maximum record capacity in MYSQL. Is it in thousands or millions. OR what is the actual limit.
Select The Maximum Date
I'd like to know how can I display the item which was newly added, therefore am willing to display the item with the maximum beginningdate which is by the way a timestamp..... how can i do it in MYSQL here is my sql query SELECT bidid, category, title, closingdate, beginningdate FROM bids WHERE userid = colname AND CURDATE()<bids.closingdate AND beginningdate=max(beginningdate) // I think my problem is here.... Invalid use of group functions!
Increase Maximum Integer Value
I'm making an online MMORPG and it seems that there is a maximum numerical value allowed in number fields of "4,294,967,295" Is there any way to remove this?
Maximum Fields In A Table
I have a website which runs pretty slow... I have turned on the SLOW-QUERY-LOG, and there's one table that is in the log over and over again... It's the table which stores 99% of the user information. This table has 61 fields, and alot of these are varChar and their set at 100 or so.... Anyways, I was curious what is the maximum amount of fields you should have in table, and in my case should I split the data between several tables and just use a complex Join statement?
Maximum Number Of Fields
I'm trying to create a table with 21 fields and I'm failing miserably. Is there a maximum limit? Or am I just blind to a typo? here's the command (in PHP): $resultID = mysql_query("CREATE TABLE wordforms (WordForm CHAR(100), Language CHAR(100), Category CHAR(100), Lexeme CHAR(100), Case CHAR(100), Number CHAR(100), Gender CHAR(100), Person CHAR(100), Tense CHAR(100), VerbForm CHAR(100), Degree CHAR(100), Adjective CHAR(100), VerbStrength CHAR(100), VerbType CHAR (100), Modal CHAR(100), Conjunction CHAR(100), Preposition CHAR(100), VerbMotionStatic CHAR(100), VerbArguments CHAR(100), VerbTransitivity CHAR(100), VerbObjectCase CHAR(100))", $linkID);
How To Find Out Maximum Varchar Length Used?
Is there a way to find out what the maximum varchar length currently in use is for a field? eg. if the field is varchar(128), I want to know how much of that 128 is used in all records, so that I can lower it if need be. I tried "SELECT Max(ProdName) FROM mc_products", but that just gave me the record beginning with an "Xyron Repositionable Adhesive Transfer Cartridge", so obviously it select the last field alphabetically. Is there such a function like "SELECT MaxLength(ProdName) FROM mc_products"?
Maximum Size Of Blob Type
i need to upload files to mysql, that file sie is 1.5MB the field type is longblob. when i am uploading this 1.5MB file my php script saying succefully uploaded, but the file is not avilable in mysql table?
Maximum Number Of Databases / Schema
Are there any known limitations about the number of used databases/schema within a single database connection? We try to create an application that should use up to several hundred databases/schema within the same database connection and I found no documentation about any limits for this handling. We want to use MySQL 5.0 or 5.1.
Maximum Of 254 Prepared Statements Per Connection
MySQL v4.1.0-alpha only allows a client to prepare a maximum of 254 statements. On the 255th mysql_prepare() call, a failure is returned with no information returned by mysql_error(). This occurs even if the statements are closed after each use. Code:
Increasing Maximum Number Of Columns
I have a requirement for tables with thousands of columns. I know this is not typical, but these tables are both application-generated and appplication-read. We need a minimum of ~3000 columns. I thought MySQL supported this ... but we can't get past 1000 (4.1.18) Any ideas?
Maximum Length For Text Column
I am attempting to make a php/mysql script that will allow me to easily update my online log. The problem is that when trying to set up a mysql table to hold my data I keep getting an error when trying to make a text column with a maximum length of 65000 (I think that is the max for text right?). This is the error I get (I am using phpmyadmin): SQL-query : CREATE TABLE `log` ( `id` INT( 6 ) NOT NULL AUTO_INCREMENT, `title` VARCHAR( 100 ) NOT NULL , `date` VARCHAR( 100 ) NOT NULL , `message` TEXT( 65000 ) NOT NULL , INDEX ( `id` ) ) MySQL said: You have an error in your SQL syntax near '(65000) NOT NULL, INDEX (`id`))' at line 1 I don't know enough about mysql to figure any of this out :). I do know that the problem is deffinelty with the message column as if I leave it out I don't get an error. I would assume that I am perhaps specifying to great of a length but it won't even work at 10000.
Find Maximum Value Of Distinct Group
I'm trying to find maximum value of column for each member of a distinct group. Sample Table: ===================================================== | id | rid | report_date | report_date_formatted | | 1 | 1 | 1014267600 | 2002-02-21 | | 128 | 1 | 1202619600 | 2008-02-10 | | 158 | 2 | 1016082000 | 2002-03-14 | | 392 | 2 | 1203138000 | 2008-02-16 | The following SQL statement works fine: SELECT rid, MAX(report_date) AS maxreportdate FROM report_postsGROUP BY rid Output: ======================= | rid | report_date | | 1 | 1202619600 | | 2 | 1203138000 | Here is the problem... If I try to add another column to the query, the extra column does not match the results. This is NOT working: SELECT rid, report_date_formatted, MAX(report_date) AS maxreportdate FROM report_posts GROUP BY rid Erroneous Output: ==================== | rid | report_date | report_date_formatted | | 1 | 1202619600 | 2003-08-07 | | 2 | 1203138000 | 2007-04-10 | The first two columns (rid & report_date) are correct and as expected, BUT the final additional column is INCORRECT and does NOT correspond to the selected row.
Using A Query To Determine The Maximum Value A Number Col Can Hold?
I'm trying to find out how can you determine the largest value you can enter into a column of type smallint,mediumint,int, etc using a query. I know what the values are by looking at the documentation, but I would like to get this number using a query at runtime. So when I insert values into different tables/columns I can use an appropiate restriction befor trying to insert.
Selecting A MINIMUM And MAXIMUM Number Of Rows.
I have a problem where I want to get no more than 10 (LIMIT) of the newest records from a table that are within a month, but I want to get at MINIMUM 3 records, all using SQL. I can do : ------------------- SELECT * FROM updates WHERE date_of_update BETWEEN DATE_SUB( CURDATE( ) , INTERVAL 1 MONTH ) AND CURDATE( ) ORDER BY date_of_update DESC LIMIT 0 , 10 ------------------- To limit it to the 10 updates no older than a month, but if there are no updates within a month I get nothing. So I would like to do something like : ------------------- SELECT * FROM updates WHERE ROWNUM() < 3 OR ((date_of_update BETWEEN DATE_SUB( CURDATE( ) , INTERVAL 1 MONTH ) AND CURDATE( )) AND update_id IN ( SELECT * FROM updates ORDER BY date_of_update DESC LIMIT 0, 10 )) ------------------- This code will take the 10 most recent updates and then starts pulling them out as long as the number of rows is less less than 3 or the update is within the date range and one of the 10 recent updates. The problem is that mySQL appears not to have any kind of rownum function. Limit is a nice substitute except it only works for setting an upper bound, not a lower bound number of records.
Decimal / Numeric Value Exceeds Maximum Precision
I have a table with a Decimal(3,1) and a SMALLINT. When I insert 120,0 (for the decimal) the value is stored as 99.0 I'm used that I get a error like Decimal value exceeds maximum precision. This is also when I insert a value greater then 32767 for the smallint. I want to get an error. But how do I get this.
Maximum Number Of Databases In A Single Installation
I'm checking out MySQL 5.0.45 and am wondering what is the greatest number of databases I can create on a given installation. I have only been able to find information on max tables and max columns per db. What performance issues may be involved when running at or close to the max number of DBs. What changes to default settings would need to happen in order to run a server with max db's given a high amount of available RAM and disk storage?
Maximum Number Of Columns And Actual Data In A Row
SUMMARY: I need to know what the actual maximum date limit possible on a row of a MYSQL database. MORE DETAILS: For example, does a MYSQL database only allow 4032 bytes of data to be stored in one row or is there no limit? Does it only allow a maximum of 50 colmums? I tried googling on this, but all the results seem to be about recommended maximums or design style. As an ex-Access developer I remeber hitting a limit with the Access DB which I think was that one row could contain 2048 bytes max(things like blobs do not contribute to this limit). I'm hoping there are no limitations with MYSQL. My reason for asking is that I have been asked to add new fields to someone elses DB. There are already a lot of columns and the short and dirty fix for me which would mean minimul PHP script changes is by adding new fields to the current table. But there are already quite a few so thought I would check.
Maximum Execution Time Of 300 Seconds Exceeded (was "MYSQL Error")
I have a huge database 400mb+ in size which i have exported into a .sql file. I tried to run this export script into a new database and it runs fine until three quarters into the scripts execution and the following error appears: ERROR 1064 (42000): 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 '<br / > <b>Fatal error</b>: Maximum execution time of 300 seconds exceeded in <b' at li ne 1 I believe this error may relate to "delayed_insert_timeout = 300". How do I increase this limit in mysql - maybe it may solve the problem but then again it may not . Any advice is most gratefully appreciated - As you can imagine if the script runs fine for 3/4 of it and then an error appears, stating the error is on line 1, it will take me days to go through the whole script (hundreds of thousands of rows) to find the error as I assume the error does not reside on line 1 as this line would have been executed. I am running the script on mysql 5, and via source /path/****.sql on linux.
|
TRACKER
