I want user to search by postcode, they could enter full postcode (eg: UB100PE / UB10 0PE) or first part of postcode (UB10)
I will use getUKPostcodeFirstPart("UB100PE") to get first part of postcode
Ref: getUKPostcodeFirstPart() by LazyOne
I want to display a list of record from first part of postcode, is this how it should be done?
Should I add stripped_postcode field in the table?
Something like::
SELECT records.company, records.full_postcode, area.* FROM records
LEFT JOIN area on area.stripped_postcode = records.stripped_postcode AND records.id= area.record_id
WHERE records.stripped_postcode = "UB10"
It is linked with two tables, records and area
record table:
id (PK)
company
postcode
stripped_postcode
area table:
id (PK)
record_id (FK)
stripped_postcode
field1
field2
I'm a bit confused: seems like a lot of work for avoiding the use of a like in SQL.
SELECT records.company, records.full_postcode, area.[insert your fields here]
FROM records
LEFT JOIN area
ON area.stripped_postcode = records.stripped_postcode
AND records.id= area.record_id
WHERE records.postcode like strSearch+'%'
Related
I have a table called places which has 2 million records. In these records there is a column called city_name.
In another table I have 2 columns: city_name and city_id.
My aim is to search the table cities with the city_name from the table places and insert the corresponding city_id from the table cities into the table places.
I have tried to use the following:
UPDATE places
INNER JOIN cities USING (city_name)
SET places.city_id = cities.city_id
The problem with this is that it has worked but i am having random city_id's in the city_id field that does not match the city name.
I should also mention that there might not be a corresponding city name in the table cities, so i want to ignore records that do not exist.
Can anyone help please. I am using phpmyadmin
Thank you
If I understand your request correctly the solution would be
UPDATE places
SET places.city_id = (SELECT cities.city_id
FROM cities
WHERE cities.city_name = places.city_name)
I have an mp3 downloading site and I want to create a search page, but I am in simple confusion. I have two tables, one that stores movie details like movie name and movie cast, and another one where all the songs of movies are stored. The structure of two tables is shown below:
Table 1: name categories
column :5
id,cat,cast,year,type
here id is primary key
cat is album/movie name
cast is all actores details of movie
year is releasing year and type is movie type
Table 2: files
column :4
id,cat,preview,file
Here my user can search with any keywords, and I can extract rows by sql query but here are two tables so I am confused what to do?
The user can input previews from table and can enter cat, type, cast, type and year from table 1.
Your table structure is not clear, But using join in query is not that complicated as you think, try and learn. Good luck
SELECT Category.cat, Category.cast, Category.year, Category.Type, File.preview, File.file
FROM category As Category
LEFT JOIN files As File On Category.cat = File.cat
WHERE Category.cat LIKE '%search%' OR Category.cast LIKE '%search%'
OR File.preview LIKE '%search%'
etc
i have 2 tables on db.
First table:
users
id|name|mail|password|group
second table
scores
id|name|score
The idea is get the name from users using the id (this id already know because i get that by php), then insert a score in table scores using the name obtained by a id.
I suppose that can i do with a inner join between users and scores.
How can i do that?
Insert into scores(id, name, score)
select ID, name, score(that you can pass)
from users
where id = (parameter pass by PHP)
Agree. You can simply use this:
INSERT INTO scores values (null, (select name from users where users.id= 1),100);
Replace the score and id with the values you get.
Assume you have the auto increment for your ids.
I have a publications database and I need to fetch some information regarding the author. The author field is such that the authors have been lumped together in one field e.g if a book has two authors called Robert Ludlum and John Grisham, in the database it is saved as Ludlum, R.;Grisham,J.;
My application needs to spool information and retrieve data on books authored by a particular author if they click on their name. I am using this statement to retrieve the data
$select = "SELECT tblPublications.Title, tblPublications.Year FROM tblPublications WHERE tblPublications.Authors LIKE '%$sname%'";
$sname is a variable referring to the surname of the author. The problem arises if two authors share the same surname. however a workaround I am trying to implement is to get the applicationtake the surname, insert a comma, take the first name of a user and get the first letter then combine the result to a stringe and match them to each comma delimited value in the author field e.g if it is Grisham's books I am looking for I use *Grisham, J.* in my query.
Any Idea how to do this in PHP,MYSQL?
If it is possible to redesign the database, you should probably have an authors table and a book_authors table that relates books to authors, so that multiple authors can be associated with each book. Where is the Last Name coming from that the user clicks? Is it possible to have the link generated be LastName, First letter of first name? If so then you can probably change the link so it will include the first letter. But it is still possible to have two authors with the same last name and first letter of first name. So I think the best solution is to have an authors table and a Book_authors table and just store the author id as a hidden field and use that to retrieve the books by the selected author.
Your database design is incorrect, you have not normalized the data.
If you use like to search with leading wildcards, you will kill any chance of using an index.
Your only option to fix (if you want to keep the mistaken CSV data) is to convert the table to MyISAM format and put a FULLTEXT index on the authors field.
You can then search for an author using
SELECT fielda, b,c FROM table1 WHERE MATCH(authors) against ('$lastname')
See: http://dev.mysql.com/doc/refman/5.0/en/fulltext-search.html
Of course a better option would be to normalize the database and create a separate table for authors with a link table.
TABLE books
------------
id primary key
other book data
TABLE authors
--------------
id primary key
lastname varchar (indexed)
other author data
TABLE author_book_link
----------------------
author_id
book_id
PRIMARY KEY ab (author_id, book_id)
Now you can query using very fast indexes using something like:
SELECT b.name, b.ISBN, a.name
FROM books b
INNER JOIN author_book_link ab ON (ab.book_id = b.id)
INNER JOIN author a ON (a.id = ab.author_id)
WHERE a.lastname = '$lastname'
It would entirely depend on what input you are getting from the user.
If the user just types a name, then there isn't much you can do (as there is no guarantee that they will enter it in a correct format for you to parse).
If you are getting them to type in a firstname and lastname however, something like this could be done:
<?php
$firstname = trim(mysql_real_escape_string($_GET['fname']));
$surname = trim(mysql_real_escape_string($_GET['sname']));
$firstletter = substr($_GET['fname'],0,1);
$sname = $surname.', '.$firstletter;
$select = "SELECT tblPublications.Title,
tblPublications.Year
FROM tblPublications
WHERE tblPublications.Authors LIKE '%$sname%'";
I work with PHP. I have a table named books. In table books I have the book_name with the name of the book, book_publisher with the publisher's ID and book_author with the author's ID. Besides the books table I have the books_author table with the authors names and IDs and books_publisher with the books publishers names and IDs.
I give my users 3 input fields that represents author name, book name and publisher name and a search button. They can input an author name, a book name and publisher name in the same search and I have to query my database and return the books names that have author name LIKE (%..%) inputted author name, book name LIKE the inputted book name and publisher name LIKE the inputted publisher name.
The problem is that I have stored only the author's id and publisher's id in my books table and I need to search by all three fields and exclude duplicates (books that were match by name and also by publisher).
Can anybody help me building this query ?
Just join the query:
SELECT *
FROM books b
JOIN book_authors ba ON b.author_id = ba.id
JOIN book_publishers bp ON b.publisher_id = bp.id
WHERE b.book_name LIKE '...'
AND ba.author_name LIKE '...'
AND bp.publisher_name LIKE '...'
Usually in these situations the search boxes are optional so you'll need to dynamically construct the query, meaning the WHERE clause to only filter on, say, publisher name if the user actually entered a publisher name.
Also, searching on LIKE '%blah%' is not scalable beyond thousands or possibly tens of thousands of records. No indexing can cater for that. You may want to look into using something like the MySQL full-text searching instead.
Lastly, make sure you sanitize your input, meaning pass all your input fields through mysql_real_escape_string().