I am trying to convert this MSSQL QUERY to MYSQL
Query looks like this
select tu.FirstName+' '+tu.LastName as name,tg.Name as game_name,tg.Status,tg.UserId,tg.gameid from tblUsers tu
inner join tblGame tg on
tu.UserId=tg.UserId where tg.Name LIKE #Name + '%'
the same query doesnt return any records when i run it on MYSQL, what is the issue ? It works good on SQL server
SELECT CONCAT_WS(' ', tu.FirstName, tu.LastName) AS name, tg.Name AS game_name,tg.Status,tg.UserId,tg.gameid
FROM tblUsers tu
INNER JOIN tblGame tg ON tu.UserId=tg.UserId
WHERE tg.Name LIKE CONCAT(tu.FirstName, ' ', tu.LastName, '%')
Notes:
it's case insensitive, I've used upper case just for readability
I've intentionally used both concat and concat_ws to show them as options
select tu.FirstName+' '+tu.LastName as name,tg.Name as
game_name,tg.Status,tg.UserId,tg.gameid from tblUsers tu
inner join tblGame tg on
tu.UserId=tg.UserId where tg.Name LIKE #Name + '%'
select concat(tu.firstName,' ',tu.lastName) as name, ,tg.Name as
game_name,tg.Status,tg.UserId,tg.gameid from tblUsers as tu
inner join tblGame as tg on
tu.UserId=tg.UserId where tg.Name LIKE concat(#Name,'%');
Note that, there is not (for example) field1+' '+field2,
There is concat, concat_ws, and group_concat,
read about it, it's super useful.
Related
I'm current facing a issue in my project. When i search a product, it take too much time to fetch data.
This is sql code.
SELECT * FROM product_info
LEFT JOIN (
SELECT bulk_stock_info.bulk_unit_buy_price,bulk_stock_info.general_unit_sale_price,bulk_stock_info.bulk_unit_sale_price,bulk_stock_info.product_id as pid
FROM bulk_stock_info
ORDER BY bulk_id DESC
) bulk_stock_info
ON bulk_stock_info.pid = product_info.product_id
WHERE (`product_name` RLIKE ' +$query') OR `product_name` LIKE '$query%';"
There is no reason to use a subquery or outer join:
SELECT pi.*
bsi.bulk_unit_buy_price, bsi.general_unit_sale_price, bsi.bulk_unit_sale_price
FROM product_info pi JOIN
bulk_stock_info bsi
ON bsi.product_id = pi.product_id
WHERE pi.product_name RLIKE ' +$query' OR pi.product_name LIKE '$query%'
I am trying to search for query on first name and last name field
here is my query
SELECT d.title, GROUP_CONCAT(u.firstName,' ',u.lastName) as fullname
FROM DEALS d
left JOIN USER u ON u.idUser = d.userId
WHERE ((d.title LIKE '%goutham%' OR d.keywords LIKE '%goutham%')
OR fullname LIKE '%goutham%') AND d.isPublic=1
But i got
Unknown column 'fullname' in 'where clause'
The immediate cause of your problem is that you can't refer to an alias defined in the SELECT clause in the WHERE clause of the same query. The solution would be to repeat the entire expression instead of using the alias. However, based on your comment, you really want to check the first name, so do just that:
SELECT
d.title,
CONCAT(u.firstName, ' ', u.lastName) AS fullname
FROM DEALS d
LEFT JOIN USER u
ON u.idUser = d.userId
WHERE
(d.title LIKE '%goutham%' OR
d.keywords LIKE '%goutham%' OR
u.firstName LIKE '%goutham%') AND d.isPublic = 1;
You cannot use a column alias in where. It has nothing to do with the rest of your query.
You don't have a GROUP BY, so I suspect GROUP_CONCAT() is not intended. Instead you want CONCAT(). You can repeat the expression in the WHERE, but I think you should look in each component:
SELECT d.title, CONCAT(u.firstName, ' ', u.lastName) as fullname
FROM DEALS d left JOIN USER
u
ON u.idUser = d.userId
WHERE (d.title LIKE '%goutham%' OR
d.keywords LIKE '%goutham%' OR
u.firstName LIKE '%goutham%' OR
u.lastName LIKE '%goutham%'
) AND
d.isPublic = 1;
If you care about performance and are looking for words, then you might want to look into MySQL's full text index capabilities.
If you still want to look on the combination, I would recommend repeating the expression:
WHERE (d.title LIKE '%goutham%' OR
d.keywords LIKE '%goutham%' OR
CONCAT(u.firstName, ' ', u.lastName) LIKE '%goutham%'
) AND
d.isPublic = 1;
I am making the sql code. I have met the barrier, that is, so many select sentences in SQL query. Finally I want to get to the intersection of 9 select results
My sql code is same as below, just 1 select sentence. 8 select sentences are different from only search word, eg) cholera, diarrhea, fever, vomit, nausea, etc
First select sentence. Don't be suprised. That code is simple and repeatedly.
(SELECT code_co.code, code_co.disease_co, code_en.disease_en
FROM code_co
LEFT JOIN code_en ON code_en.code = code_co.code
LEFT JOIN note ON note.code = code_co.code
LEFT JOIN inclusion ON inclusion.code = code_co.code
LEFT JOIN exclusion ON exclusion.code = code_co.code
LEFT JOIN ds ON code_co.code = ds.code
LEFT JOIN tx ON code_co.code = tx.code
LEFT JOIN sx ON code_co.code = sx.code
WHERE
note LIKE CONCAT( '%', (
SELECT ds_word.ds_en
FROM ds_word
WHERE ds_co LIKE '%cholera%'
LIMIT 0 , 1
), '%' )
or
ds_content LIKE CONCAT( '%', (
SELECT ds_word.ds_en
FROM ds_word
WHERE ds_co LIKE '%cholera%'
LIMIT 0 , 1
), '%' )
...
inclusion LIKE CONCAT( '%', (
SELECT ds_word.ds_en
FROM ds_word
WHERE ds_co LIKE '%cholera%'
LIMIT 0 , 1
), '%' )
)
Below is the captured picture on phpmyadmin.
Really working code!
And 2nd select sentence is same as first sentence except cholera. Cholera is my search word.
In this way, I have 9 select sentences.
I want to get the intersection, but in MySQL, How can I care?
Intersect or minus can be used in just 2 sentences. (Right?)
(1st select sentence)
intersect
(2nd select sentence)
intersect
(3rd select sentence)
...
This way is right?
Please help me.
Thank you for your advice
You do the "intersect" by using and in the where clause. Using or is equivalent to a "union".
Also, you can simplify your expression by doing:
LEFT JOIN sx ON code_co.code = sx.code
CROSS JOIN (SELECT concat('%', ds_word.ds_en, '%') as pattern
FROM ds_word
WHERE ds_co LIKE '%cholera%'
LIMIT 0 , 1
) const
WHERE note LIKE const.pattern and
ds_content like const.pattern and
. . .
I have produced the following query.
SELECT t.id AS playerid,
dp.first_name,
dp.surname
FROM ".TBL_FOOT_CAREER_TEAMS." t
INNER JOIN ".TBL_FOOT_CAREER_DB_PLAYERS." dp
ON dp.id = t.playerid
WHERE t.careerid = '$career'
AND (dp.first_name LIKE '%{$keyword[$i]}%')
OR (dp.surname LIKE '%{$keyword[$i]}%')
OR (`dp.first_name + dp.surname` LIKE '%{$keyword[$i]}%')
There are two columns in the database. first_name and surname. As you can see, I'm trying to check if the keyword is in either of those columns. I also try and make them into one complete name and check if that's what the search term is aswell.
I'm getting an error so I can assume this isn't the way to do it!!
Can someone help :)
Thanks
SELECT t.id AS playerid,
dp.first_name,
dp.surname
FROM ".TBL_FOOT_CAREER_TEAMS." t
INNER JOIN ".TBL_FOOT_CAREER_DB_PLAYERS." dp
ON dp.id = t.playerid
WHERE (t.careerid = '$career') AND
(
(dp.first_name LIKE concat('%', $keyword[$i], '%')) OR
(dp.surname LIKE concat('%', $keyword[$i], '%')) OR
(CONCAT(dp.first_name, ' ',dp.surname) LIKE concat('%', $keyword[$i], '%'))
)
UPDATE
since you are concactenating the name, you can it like this:
SELECT t.id AS playerid,
dp.first_name,
dp.surname
FROM ".TBL_FOOT_CAREER_TEAMS." t
INNER JOIN ".TBL_FOOT_CAREER_DB_PLAYERS." dp
ON dp.id = t.playerid
WHERE (t.careerid = '$career') AND
(
CONCAT(dp.first_name, ' ',dp.surname) LIKE concat('%', $keyword[$i], '%')
)
Use CONCAT() in your query: http://dev.mysql.com/doc/refman/5.0/en/string-functions.html#function_concat
...
OR CONCAT(dp.first_name, dp.surname) LIKE '%{$keyword[$i]}%'
I have been trying to get this working for quite a while now but it just doesn't seem to work, maybe it is is not even possible, what i am wanting to do is to perform a MySQL join query using like, such as this example i found...
SELECT *
FROM Table1
INNER JOIN Table2 ON Table1.col LIKE '%' + Table2.col + '%'
but it just doesn't seem to work at all, any help that can be given would be brilliant, thanks !
Try
SELECT *
FROM Table1
INNER JOIN Table2 ON Table1.col LIKE CONCAT('%', Table2.col, '%')
MySQL does string concatenation differently from other databases, so in case you want to port your app, you need to have an alternate version where || is used as concatenation operator, as mentioned by Michael in another answer. This operator doesn't work in MySQL though, since it means or.
How about this instead:
SELECT * FROM Table1, Table2 WHERE Table1.col LIKE '%'+Table2.col+'%';
Since you're selecting everything from both tables anyway, this would probably get you there.
SELECT p.products_id, pd.products_name, p.products_model
FROM products_description pd
JOIN products p ON p.products_id = pd.products_id
WHERE pd.products_name LIKE CONCAT( '%', p.products_model, '%' )
LIMIT 0 , 100
First off you have to restrict your request by (p.products_id = pd.products_id) and LIMIT. And look what time it took. After that you can go and make comparison with (WHERE). If you gonna compare directly within JOIN you will put down your db if there are at list 20 thousands items. Beware.)