How Do I Add Default To Existing Column?
It should be easy but i've searched from mysql manual to here...
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With INSERT Can I Increment An Existing Value In A Column?
I have a table of addresses and a seperate table with contact names - All addresses tie to one or more names - I would like to keep track of the number of names 'belonging' to an address and have thus included a column in my address table called num_of_contacts. Everytime I add a new contact, I would like to increment the num_of_contacts column in the address table. Is this possible? Me thinks not (or at least, my attempts so far have failed me) so I'd appreciate it if someone could tell me if I am wasteing my time trying and instead SELECT the record, increment it, then UPDATE it.
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Alter Query For Existing Column...?
Im executing my 'ALTER query to add a COLUMN in a table, for which the column specified is already exists. So when i execute the script it throws an error as 'Duplicate column'. how to check for 'COLUMN' IF EXISTS and if the column specified does not exists, my alter script should be executed. Can it be done using stored PROCEDURES.
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Search Table Column For Existing Value
I would like to search a table's column so that I can match an entered email address against the data in that column. I'm writing an aplication for an event and I don't want duplicate email addresses in the table. I'm using PHP4.
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Finding Sort Order For An Existing Key Column Associated With An Index
I am trying to find within the INFORMATION_SCHEMA tables the Sort Order (ASC or DESC) of a specific Key Column associated with an existing Index. I thought maybe KEY_COLUMN_USAGE might have it but unfortunately it doesn't from what I read. It has ORDINAL_POSITION but that only lists the position of that column against other key columns for a given index. Anyone know where I might find this information or if this information is not found in the INFORMATION_SCHEMA tables? Parsing the index DDL is not considered an option for me at the moment.
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How Do I Replace Data In An Existing Table - Based On A Column With An Identifier
Each record in the table I want to update has a unique identifier: products_model. For a given model number, I want to replace its image, which is located in a field called products_image. The file with the new data is a .txt file, a sample of which looks like this: v_products_modelv_products_imageEOREOR 5361453614.jpgEOREOR 5361553615.jpgEOREOR 5372453724.jpgEOREOR The beginning part of the table looks like this: +----------------------------------+---------------+------+-----+---------------------+----------------+ | Field | Type | Null | Key | Default | Extra | +----------------------------------+---------------+------+-----+---------------------+----------------+ | products_id | int(11) | NO | PRI | NULL auto_increment | | products_type | int(11) | NO | | 1 | | | products_quantity | float | NO | | 0 | | | products_model | varchar(32) | YES | MUL | NULL | | | products_image | varchar(64) | YES | | NULL | | | products_price | decimal(15,4) | NO | | 0.0000 | | | products_virtual | tinyint(1) | NO | | 0 | | From what I've read over the past few days...I think I need to: (a) delete the EOREOR column from the text file; (b) use the LOAD DATA INFILE command somehow, telling it to ignore the first line of column headers in the text file.
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Use Now() As Default Value For A Column
I cannot find any good material on this, and it seems like it should be so easy. I have two columns in my table, creation_date and last_modified_date. I want the creation_date field to bear the default value of Now(), so that when a row is created the timestamp is there. This value should never change, and should only be set on row creation. The last_modified_date field I want to change on the UPDATE only. It seems that this may be possible using the TIMESTAMP type and the default values there but what I read is that they will update everytime a row is altered. This would be dead-simple if I could just specify Now() as the default value.
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Default Value For A Column, When Value Is Not Specified
We have migrated our database from DB2 to MYSQL. In DB2, there is an option like 'GENERATED BY DEFAULT AS IDENTITY' which will cause DB2 to generate unique values for the identity column during insert operations if no value is specified for the identity column. However, if a value is specified for the identity column, DB2 will use it in the insert operation. In MYSQL, is there an option like this?
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Default Value On A Column
Hey guys, my hope is to quickly move from SQL2005 to mySQL and i'm hitting the GUID roadblock. If mySQL can't do a GUID by default on a column, I've got to rewrite a ton of my application around that. Tell me with 5.0 this is possible now? Or that there's some cool work-around?
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Default Value On Date Column
Using MySQL control center, I created a MySQL database table with a column of Date type. It always give the a Default value (0000-00-00) even null is allowed. I tried remove the default value and it comes back by itself. So if I don't supply a value when insert, the default is used. Query IS NOT NULL will not exclude this record. Now, In VB (with ADO/MyOLEDB), I did the exact query trying to filter out the null record. But I still get the record just like in Control Center. BUT, the value on this column is "NULL". How can I leave the Date field as null if no value is supplied?
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Column Default Value Setting
I've got a column called 'articleheader' in a table called 'article'. It currently has a default value of NULL, but i want to set it to default to "(none)" (without the double quotes). I have tried searching to find a solution but everytime I try the posted "solutions" I get an error. I think it is because I don't specifiy the type of column it is or something.
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How To Set The Default For A Datetime Column To Curdate()
I'd like to set the default value for a datetime type column in a table to today's date. It seems I should be able to do this with the CURDATE() function. I tried adding a call to the function in the default value field when creating the table's column, by when I save the table the default reverts to "0000-00-00 00:00:00" I've done this in other RDMSs. How can I do it in MySQL?
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#1101 - BLOB/TEXT Column 'data' Can't Have A Default Value
Im using phpmyadmin for working with mySQL. (its my local version, im just trying to use it). When i want to add BLOB type column in table - that mistake appears: #1101 - BLOB/TEXT column 'data' can't have a default value I turned off strict mode (from my.ini, or by config wizard), but it did not help. I've found alot about that problem in that site, but i dont uderstand anything, because im just Newbie. So what should i do to make BLOB/TEXT column have a default value? Is it possible without using hard way, just by changing something, or download any new version?
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Date/Time As A Default Values For A Table Column
I am new to mySQL, so this question might be simple.I want to add a default value to a column that is the current date/time. I am using the mySQL Administrator and will not allow me to use a function like CURRENT_TIMESTAMP() or NOW() as a default value. I used to do this with other databases (I always add a column to all of my tables called InsertDateTime and UpdateDateTime. It helps to track down data entry problems)
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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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Table Joins On Existing/Non-Existing Data
I have a question that involves a joining tables on potentially non-existing data, but we will know the expected values whether they exist or not. Say we're keeping statistics on any given number of sports for attendances over weekly time periods. There's two tables to hold data. ------------------------------ TABLE: StatisticTypes id name ------------------------------ TABLE: Statistics id statisticTypeId value date ------------------------------ Then, say, we have three entries in the StatisticTypes table for types of sports we're keeping data on...
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Can I: Export Column, Optimize & Fill New Column With Value To Original Column?
I have a database with over 40,000 rows and 28 columns (learned how to import large files by changing php.ini!). Using Excel, I am able to: (A) copy and paste original column (e.g., SIZE_TEXT) (B) ALONG with each records' UNIQUE_KEY, (C) sort SIZE_TEXT column, (D) filter for unique values, (E) fill new column with its SIZE_TEXT__KEY, and then (F) import the new SIZE_TEXT_KEY value into the database by creating a new column or pasting over the columns original value. However, I think this can be performed, with less potential for error, using phpMyAdmin, but I haven't found anything demonstrating how to perform these actions. I searched the terms optimization and normalization. I am hoping one can use phpMyAdmin to: 1) create a new table with export column of the original table (SIZE_TEXT_TABLE), 2) sort new table for duplicates and show only unique values, then 3) import the column results into each Unique Records original column (SIZE_TEXT) 4) link new column values to Foreign Key (the Parent Table's SIZE_TEXT_KEY)
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My.cnf Not Existing
this is my first posting here so plz do not flame me too much if my quest= ion=20 marks me as a total noob. My problem is, i play around a bit with mysql (4.0.13) and want to test t= he=20 Replication. The Documentation at http://www.mysql.com says i have to do = the=20 following: Stop databases - done. Build tarball of data and bring it on slave - done. Modify my.cnf - ??? Here is my problem. There is no my.cnf existing on my machine. Maybe its=20 called different with the newer version? Or can it be considered empty an= d i=20 have to build a new one? But if i have to, in which directory would i do=20 that?
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How To Add A New Row To An Existing Table?
I am able to create database, tables, inserting values, and so forth. My question is this: Let's say I have a table on the list of items I owned, and some time later, I need to add a new item between after row 12 and before 13. How do I do that? I did look at MySQL 5.0 Manual and didn't find anything similar to what I wanted to do.
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Existing Database
I'm using MySQL 4.1.9-nt & VC++ 6.0 . how to get all the database names and table names? I'm using the VC++ syntax, CRecordset rs(&db); //here db is object of CDatabase class. rs.Open(AFX_DB_USE_DEFAULT_TYPE,"show databases ");
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Information From Existing Db
Dont know much about mySQL, so excuse my potential ignorance here : Is it possible for a table to write information to another table automatically? For example, if on "table1" I have a column called "code", can I write the entire contents of a specified row to another table called "abc" if the code "abc" appears in the "code" column of "table1"
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Check For Existing Row ?
How do I determine if a row already exists ? // see if a row has id=100 $id=100; $query="SELECT * FROM mytable WHERE id=$id"; $result=mysql_query($query); ...what do I check now ?
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ON EXISTING Clause
What I'm trying to do is update a table of mine in mySQL. However, some of the values may not exist in the table yet, while most will already be there. I have done some searching and I think I need help. I'm assuming UPDATE won't simply act as an INSERT if the existing value is not found. From my searching it seems I need to use the ON EXISTING clause with an INSERT. However, it seems that ON EXISTING can only be used when there is a primary key. In my case, thats not the case here. However, for me this is query confusing at the moment. Can someone provide a hand? My table is called "rankings" and has the following structure: comp_id - int (and an index) uid - int networth - int
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Add New Colums To Existing View
Is it possible to add new column to existing view? For example: let us have three tables: table1 with columns(c1,c2 ,c3 ) table2 with columns (cc1,cc2, cc3) table3 with columns(ccc1,ccc2) we have a view "View1" with columns say c1, cc1. Now is it possible to add new column ccc2 to the existing view "View1"
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Convert Existing Data
i am working on a project and i need to convert already existing data into the mysql date format. I was told for the project that the date format was necessary. my first question is what is the advantage of having the mysql date formate which goes like this yyyy-mm-dd. the format my data currently is in is like this mm/dd/yyyy. The second question is how to convert from mm/dd/yyyy to yyyy-mm-dd
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Edit Existing Data
I have just started to learn MySQL and this question might be silly. I have a MySQL table with user information. I want to edit this table in a website. I need to load existing data in a HTML form and then edit the fields and update them. I searched the net but could not find anything .
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Check Existing Values
In my web site I'm using PHP, & MySQL. There its needed if a user is trying to be registerd using a existing user ID. That is I think, it should check such a value existing and if exists it must display "Existing User ID".
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List Of Non-existing Users
I have 2 tables: tableFrom , tableTo. I want to have the list of users that ARE in tableFrom, but NOT in tableTo. The common field is "username". I want all the rows from tableFrom as long as they don't already exist in tableTo. An important point is that we use MySQL 4.0.20, so I can't use "NOT EXISTS(...)". This query needs to be pretty fast since it might be ran many times an hour, even minutes.
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Running An Existing SQL File
I hope this question is not too 'newbie' to answer.. I'm reading a book (PHP and MySQL web development by Luke Welling and Laura Thomson), and am getting an error on an example script. I'm trying to create tables using an existing SQL file through MySQL. According to the book, it should be done like this: > mysql -h hostname -u username -D database -p < file.sql (I've changed the hostname, username, etc.) However, I get the same error over and over again: ERROR 1064 (42000): ... at line 1. The book didn't even mention where to put the file, I've tried all sorts of things, but can't get it to work..
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Best Way To Get Data From Existing Database
what I'm trying to do is get data from an exhisting oracle database that is not looked after by myself but I have access to. What I want is for my MySql database to mirror the oracle one or update every 5mins or so. I have done a quick search but as I have only made simple databases before I'm not sure what to search for!
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Insert A Duplicate Of An Existing Row
I have a table with an auto-increment columns (absid) and I want to take a row with a certain absid and re-insert it as a new row with a new absid (but all other columns as from the copied row). Running mysql 3.23.55. Might something like the following work? insert into mytable (absid,*) values 0 select * from mytable where absid=20; or something similar? With 3.23.55 I suspect it won't work anyway but I have no access to a version 4 installation and wouldn't want to upgrade if what I want to do is inherently not possible.
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Attaching An Existing Database
I would like to attach an existing database (I have the files from another system) to MySQL running on a recovery machine - yeah, the Linux system got screwed, but I managed to recover the files. So, having the database files (.myi, .myd and .frm), how do I go about incorporating them into the current system? (Like "attach database" in MSSQL)
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Accessing Existing DB From Files Off A CD
I inherited a project from another developer who was fired. There is no database documentation. There is both an SQL backup file and the original database files on a CD. I have recreated the db from the backup file and that worked perfectly. However, I don't have full confidence in the accuracy of the backup file. I was wondering if I can somehow access the db from the files on the CD. I copied the files to a folder on my machine and then changed the MySQL data folder setting to that folder. Unfortunately MySQL wouldn't start. What would I need to do to be able to have MySQL use the files copied from the CD as the data files?
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Uploading Existing Database
I just got a dedicated server and can't upload some of the larger databases. I have tried compressed (gz) as well as the none zipped and automatic. None works for a 50MB + database. I am not sure what's wrong, maybe it times out, but then I never get the error. If that's the case then how do I change the timeout settings in MySQL. Also I am using Plesk, not sure if that matters.
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Add A Record To An Existing Recordset?
I have a MySQL table with about 30 records, I use a form to insert data into the first 24. (like; Name, Phone, etc...) The last 6 (Photo1, Photo2, Photo3, Photo4, Photo5, Photo6) are the names of uploaded images (which are uploaded from a seperate form. How do I (Or what MySQL statement do I use) to insert the 6 names into the recordset? (Each image name will be saved into a php variable. ($Img1, $Img2, $Img3, $Img4, $Img5, $Img6)
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Using Update To Add Value To Existing Numeric Value
I have users inputting hours into a mysql database. Is there a way to have a mysql statement take my input and add it to the existing value in a record? I suppose I could just select that value and use php to add the 2 values but was thinking mysql might have a function to do this for me.
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Load Data :: Into Existing Table
how i can put the contents of a .sql file into an existing table? The script is by php, i give the user 4 options. When the user choose option 1 then the contents of data1.sql has to be inserted in a mysql table. so something like: PHP Code: mysql_query("SELECT contents FROM data1.sql AND INSERT INTO table");
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