Hi all, I didn't write any trigger for my works. Now i want to know how to write trigger . And where it write . Is it possible to write trigger as sql query in phpmyadmin .. Please help me to write a simple trigger... I tried like below Create Trigger sales_bi_trg BEFORE INSERT ON sales FOR EACH ROW BEGIN DECLARE num_row INTEGER ; D...
I have a query where I have a complex date expression as one of the columns. SELECT date_column + INTERVAL( complex_jimmy_jam ) DAY AS complex_date_calculation FROM table I want to refer to that column in the where clause WHERE complex_date_calculation < NOW() But mysql chokes on it. 1054: Unknown column 'complex_date_calcul...
Hi! When I execute the following code in a php script. The result set is always empty. However, when I execute the same query in mysql console or in phpmyadmin,it rightfully shows 18 rows in the resultset. What could be going wrong here. $result_set = mysql_query("SELECT * FROM categories WHERE 1 ", $this->database_handle); var_dump($...
Say I have a table with an ID field, and I have a local array (in any language, php or objective c or basic or whatever) of eligible IDs. I want to delete any record in which the ID field does not match any of the eligible IDs in my array. Is there any way to do this in a single SQL query? Can you pass an array into SQL and basically sa...
Hi: I'm struggling with a rails query. Finally, I want to make a JSON response with the following contents: A listing of all countries which have at least one company, associated through "Address" and a count of how of how many companies reside in a country. Here is my simple model structure: class Country < ActiveRecord::Base has_...
Hi, I need some help on a MySQL query I'm trying to set up. I need to find records that match conditions that are located in two different tables with a many to many relationship. I use three tables in this query, the first contains projects, the second contains topics and the third ties them together. I want the query to find projects...
I have a MySQL db with a list of people, including their address, which I want to return as one field in a query. It's split into address1, address2, address3, address4, post_code and I want to do something like the following SELECT CONCAT(`address1`, ' ', `address2`, ' ', `address3`, ' ', `address4`, ' ', `post_code`) AS `address` FRO...
Right now I'm dealing with an issue regarding an intense acts_as_tree MySQL query via rails. The model I am querying is Foo. A Foo can belong to any one City, State or Country. My goal is to query Foos based on their location. My locations table is set up like so: I have a table in my database called locations I use a combination of ac...
I asked a similar question before only to later discover that what I thought was the answer didn't work because I hadn't asked the right question (and hadn't noticed that the answerer told me this). To revisit, I have a table of comparisons. I'm trying to select the row with the maximum version for each set of two students. So what I had...
This query works fine but I'm having trouble trying to figure out why it does not return anything if the user does not have any categories in the table "user_categories"? This is the table structure: users: user id, username, user city categories: category id, category name user_categories: user id, category id SELECT users.*, GROUP...
Hello! So I have this query that works perfectly: SELECT users.*, GROUP_CONCAT(categories.category_name) AS categories FROM users LEFT OUTER JOIN user_categories ON users.user_id = user_categories.user_id LEFT OUTER JOIN categories ON user_categories.category_id = categories.category_id WHERE users.user_city = 'brooklyn' GROUP BY users...
Hi, I'm trying to normalize a mysql database.... I currently have a table that contains 11 columns for "categories". The first column is a user_id and the other 10 are category_id_1 - category_id_10. Some rows may only contain a category_id up to category_id_1 and the rest might be NULL. I then have a table that has 2 columns, user_i...
Why does explain say that it uses type ALL for contests table though contest table has chid as primary key? mysql> explain SELECT contests.chid, contests.diff_level from contests, contest_users where contests.chid=contest_users.chid; +----+-------------+-----------------+------+---------------------+---------------------+-...
I am trying to create a query which will return all rows of a table CLASSES that do not matched with another table named CHILD_CLASSES. These two tables look like this, The table CLASSES is a self referencing table so the top CLASS does not have a parent_id. The Parent ID row is created from the class_id row. So when I inserted A1 as a...
I have the following test string engine/mail/key and a table which looks like this: +-------------+ | query | +-------------+ | engine | | engine/pdf | | engine/mail | +-------------+ I want to find the best matching row. Best match is specified by the most matching characters from the start of the string/row. I have con...
Guys I'm trying to finish this query -> my tag field is set to UNIQUE and I simply want the database to ignore any duplicate tag. INSERT INTO table_tags (tag) VALUES ('tag_a'),('tab_b'),('tag_c') ON DUPLICATE KEY IGNORE '*the offending tag and carry on*' or even this would be acceptable INSERT INTO table_tags (tag) VALUES ('tag_a'),...
How would you format a query on a MySQL database via PHP to find if an IP address falls between two numbers in two different fields? Numerical representation of IP address to find: 1265631252 Database format: IP FROM IP TO REGISTRY ASSIGNED CTRY CNTRY COUNTRY "1265631232","1265893375","arin","1152835200","US","USA","U...
hi friends, i want to get data from a table and use in the form's field and along with some new fields data i want to save all fields data in a new table,,' then what i have to do , thanxs in advance !! ...
SELECT PLD_LINK.ID, PLD_LINK.TITLE, PLD_LINK.URL, PLD_CATEGORY.TITLE, TLL_SORT_STATUS.status, PLD_LINK_COMMENT.DATE_ADDED FROM PLD_LINK, PLD_CATEGORY, TLL_SORT_STATUS, PLD_LINK_COMMENT WHERE PLD_LINK.CATEGORY_ID = PLD_CATEGORY.ID AND PLD_LINK.ID = TLL_SORT_STATUS.link_id AND PLD_LINK.PAGERANK BETWEEN -1 AND 2 ...
How to find out average timestamp the field timestamp in a table gettime Timestamp 2010-02-08 14:17:36 | 127.0.0.1 | 2010-02-08 14:17:30 | 127.0.0.1 | 2010-02-08 14:17:30 | 127.0.0.1 | The following query gives some number how to format it and get it in seconds. select avg(timestamp) from gettime; the above gives some random ...