New to php and sql so i will try to explain:
I have a SEARCH field in PHP and i am trying to search by 'ProposalName' that match with what the user enters.
This prints out fine:
SELECT
rec_proposal.ProposalID,
ProposalName,
Status,
researcher.FirstName,
researcher.LastName,
reviewer.FirstName as revFirstName,
reviewer.LastName as revLastName,
reviewer.UserID as revUserID,
review.ReviewDate as revDate,
rec_proposal.DateSubmitted
FROM rec_proposal
INNER JOIN User AS researcher
ON rec_proposal.userid = researcher.UserID
LEFT JOIN review
ON rec_proposal.ProposalID=review.ProposalID
LEFT JOIN User as reviewer
ON review.UserID=reviewer.UserID
But now using all the columns I need the above code to do something like this
SELECT * FROM rec_proposal WHERE CONCAT (ProposalName) LIKE'%test%'
SO if user enters the word 'test' you would see ProposalName that contains the words test
Just add your WHERE clause, it should work. And as scaisEdge noted in their comment, you don't need CONCAT() if you are just evaluating a single column :
SELECT
rec_proposal.ProposalID,
ProposalName,
Status,
researcher.FirstName,
researcher.LastName,
reviewer.FirstName as revFirstName,
reviewer.LastName as revLastName,
reviewer.UserID as revUserID,
review.ReviewDate as revDate,
rec_proposal.DateSubmitted
FROM rec_proposal
INNER JOIN User AS researcher
ON rec_proposal.userid = researcher.UserID
LEFT JOIN review
ON rec_proposal.ProposalID=review.ProposalID
LEFT JOIN User as reviewer
ON review.UserID=reviewer.UserID
WHERE rec_proposal.ProposalName LIKE '%test%'
Related
How to write this query in codeigniter
SELECT U.username,U.user_id
FROM storylikes S, user U
WHERE U.user_id=S.user_id_fk AND S.user_id_fk='$id'
try this :
$this->db->select('u.username, u.user_id');
db->where('u. user_id = s.user_id_fk');
$this->db->where('s.user_id_fk = '.$id);
$query = $this->db->get('storylikes s, user u');
use $your_variable = $query->result(); for the result
you should use joins instead of this query
$this->db->select('username,user_id');
$this->db->from('user');
$this->db->join('storylike','storylike.user_id_fk = user.user_id');
$this->db->where('storylike.user_id','$id');
as long as the db helper is loaded... You dont need to do anything special
$query = $this->db->query('SELECT U.username,U.user_id FROM storylikes S, user U WHERE U.user_id=S.user_id_fk AND S.user_id_fk=$id);
Using a cartesian (cross join) by doing FROM with 2 tables can cause some unruly results if not used 'correctly'
I suggest that if you are trying to just join tables together your SQL should be
SELECT U.username,U.user_id
FROM storylikes S, user U
INNER JOIN user U ON S.user_id = U.user_id_fk
WHERE S.user_id_fk=$id
CI querybuilder for this would be:
$query = $this->db->select('U.username,U.user_id')
->join('user U', 'S.user_id = U.user_id_fk', 'inner')
->where('S.user_id', $id)
->get('user U');
Using the correct join for the correct requirements is key;
INNER JOIN to ensure both FROM and the JOIN table match 1 for 1...
LEFT JOIN if you want to ensure you have all data from your FROM table and any without results in the JOIN table show up as NULL
RIGHT JOIN (opposite of left), to grab all data from the JOIN table and only matching data from the FROM table.
CROSS (CARTESIAN) JOIN when you want to ... frankly... mash the data together... A CROSS JOIN will also function like an INNER JOIN when you stipulate criteria in the WHERE statement (like you did) but still, use the correct JOIN for the correct usage-case.
There are other available joins but those are the basics.
Prompting for user input parameters in an Access query is fairly straight forward. Go to design view and under criteria, just put [Your Text:] -- and when the query runs the user is prompted for the field criteria.
Unfortunately when I try this with my Inner Joined Crosstab query I get the error:
The Microsoft Access engine does not recognize the '[Your Text:]' as a
valid field name or expression.
I know the inner join crosstab still allows for criteria, as hardcorded criterion works.
To give you a better idea of what I'm looking at, here is the SQL code.
DOESN'T WORK:
SELECT *
FROM ([CrossTabQ1]
INNER JOIN [CrossTabQ2] ON [CrossTabQ1].[Month] = [CrossTabQ2].[Month])
INNER JOIN [Query3] ON [CrossTabQ1].[Month] = [Query3].[Month]
WHERE ((([CrossTabQ1].[Month])= [Enter Month, in YYYY-MM Format:]))
ORDER BY [CrossTabQ1].[Month];
DOES WORK:
WHERE ((([CrossTabQ1].[Month])="2015-12"))
ORDER BY [CrossTabQ1].[Month];
Any tips regarding why I'm getting this error and how I can accept user input criterion would be greatly appreciated!
Try:
PARAMETERS Enter_Month Text ( 255 );
SELECT *
FROM ([CrossTabQ1]
INNER JOIN [CrossTabQ2] ON [CrossTabQ1].[Month] = [CrossTabQ2].[Month])
INNER JOIN [Query3] ON [CrossTabQ1].[Month] = [Query3].[Month]
WHERE ((([CrossTabQ1].[Month])=[Enter_Month]))
ORDER BY [CrossTabQ1].[Month];
I currently have a search form which should allow a user to search for a customers full name and it will return the row.
For Example: A user searches for "Mr. N Mallow" and it will return the row which matches that query. Since I am new to MySQL I need some help, I've tried + but that has no effect, probably because it's not standard mysql or something like that.
select *
from mooring
left join customer
on mooring.assignedTo = customer.id
where mooring.Number like \"$var\"
or (customer.TitleName + customer.Surname = '$var')
Any suggestions?
select * from mooring
left join customer on mooring.assignedTo = customer.id
where mooring.Number like \"$var\" OR (customer.TitleName + customer.Surname = '$var')
Try CONCAT_WS or CONCAT, which join strings together (the first version is "with separator"):
CONCAT(customer.TitleName,' ',customer.Surname)
or
CONCAT_WS(' ',customer.TitleName,customer.Surname)
i have one query that need some changes, and i don't get any clue to do this :
this is my query :
select * from user_data a
left join user_group b
on (a.role like b.role)
actually role value in userdata is (varchar)'staff'
and role value in group is (varchar)'staff;security;finance'
so i don't get result what i expected ..
i imagine the query should be similar to this :
select * from user_data a
left join user_group b
on (b.role like a.role+";%") // using wildcard
and i still don't know the right query using wildcard to this case
any one can help?
You can use CONCAT:
select * from user_data a
left join user_group b
on (b.role like CONCAT(a.role,";%")) // using wildcard
Note - does b.role only have to match a.role at the beginning? what if it was security;staff;finance? You could do CONCAT('%',a.role,'%').
You could do CONCAT('%','a.role','%') to handle matching a.role at any position, but only if you can be sure that you won't have nested roles.
For example: if b.role is staff and a.role is finance;gardenstaff;security, then this row will be returned from the query even though the role is gardenstaff and not staff.
As an alternative, you can use RLIKE instead of LIKE. This is basically a regular-expressions verson of LIKE.
In particular, the regex [[:<:]]staff[[:>:]] will match the whole word staff. The [[:<:]] and [[:>:]] stand for word boundaries, which stop you from matching the staff in gardenstaff.
So, your query could be:
select * from user_data a
left join user_group b
on (b.role RLIKE CONCAT('[[:<:]]',a.role,'[[:>:]]'))
And this would work for b.role being anywhere in the semicolon-separated a.role.
I am currently running this SQL
SELECT jm_recipe.name, jm_recipe.slug
FROM jm_recipe
LEFT JOIN jm_category_recipe ON jm_category_recipe.recipe_id = jm_recipe.id
WHERE jm_category_recipe.category_id = $cat"
This returns the desired results except that I also need to return the name of the category that the recipe I am looking for is in, to do this I tried to add the field in to my SELECT statement and also add the table into the FROM clause,
SELECT jm_recipe.name, jm_recipe.slug, jm_category_name
FROM jm_recipe, jm_category
LEFT JOIN jm_category_recipe ON jm_category_recipe.recipe_id = jm_recipe.id
WHERE jm_category_recipe.category_id = $cat"
However this just returns no results, what am i doing wrong?
You need to join both tables:
SELECT jm_recipe.name, jm_recipe.slug, jm.category_name
FROM jm_recipe
INNER JOIN jm_category_recipe ON jm_category_recipe.recipe_id = jm_recipe.id
INNER JOIN jm_category ON jm_recipe.recipe_id = jm_category.recipe_id
WHERE jm_category_recipe.category_id = $cat
I've changed the joins to inner joins as well. You might want to make them both LEFT joins if you have NULLs and want them in the result.
Also, you're vulnerable to SQL Injection by simply copying over $cat.
Here's some PHP specific info for you (I'm assuming you're using PHP.)