I am getting a syntax error with the code below and I can't pinpoint what's wrong.
SELECT contrat.nomPrenom
FROM contrat
WHERE Type_emploi LIKE 'Acteur'
INNER JOIN film
ON contrat.ID_film = film.ID_film
AND film.Note IN (
SELECT Note
FROM film
ORDER BY Note
DESC
LIMIT 1
)
WHERE Type_emploi LIKE 'Acteur' INNER JOIN film
Error is here: you have to use INNER JOIN before using WHERE clause.
Try inner join before the where clause
Related
I have a query that works perfectly, however I need to change it a bit but it shows me an error and I can't figure out why. Below is the code before and after the changes I made:
BEFORE:
SELECT *,
(SELECT GROUP_CONCAT(pho_file_name) FROM post_images WHERE pho_post_id=posts.ID) AS photo_file_array
FROM users
INNER JOIN posts ON users.Id = posts.post_author
ORDER BY posts.ID;
AFTER:
SELECT *,
(SELECT GROUP_CONCAT(pho_file_name) FROM post_images WHERE pho_post_id=posts.ID) AS photo_file_array
FROM users WHERE users.Id = "1"
INNER JOIN posts ON users.Id = posts.post_author ON posts.post_date = "2020-12-04 07:51:21"
ORDER BY posts.ID;
It shows me the following error:
#1064 - You have an error in your SQL syntax; check the manual that corresponds to your MariaDB server version for the right syntax to use near 'INNER JOIN posts ON users.Id = posts.post_author AND posts.post_date "2020-12...' at line 4
I'm a newbie on MySql but from what I can understand I think the error occurs because of the the double ON inside the INNER JOIN. So, is it possible to add multiple ON inside the INNER JOIN? Thanks in advance!!
You have a few syntax issues, you can't put joins and where anywhere, you also need to use the correct delimiters and data types.
Try the following and note using table and column aliases makes for an easier-to-read query.
Additionally, consider not using select * and reference only the columns you actually require, if possible.
SELECT u.*, p.*, (
SELECT GROUP_CONCAT(i.pho_file_name)
FROM post_images i
WHERE i.pho_post_id = p.ID
) AS photo_file_array
FROM users u
JOIN posts p ON p.post_author = u.Id
AND p.post_date = '2020-12-04 07:51:21'
WHERE u.Id = 1
ORDER BY p.ID;
Here is a full working query. The errors (double ONclause, WHERE clause in the wrong position, wrong quotes) are corrected. Moreover, the ID is compared to an integer now and the post_date to a timestamp literal. I've used table aliases to get this more readable.
SELECT
u.*,
p.*,
(
SELECT GROUP_CONCAT(pi.pho_file_name)
FROM post_images pi
WHERE pi.pho_post_id = p.id
) AS photo_file_array
FROM users u
INNER JOIN posts p ON p.post_author = u.id
AND p.post_date = TIMESTAMP '2020-12-04 07:51:21'
WHERE u.id = 1
ORDER BY p.id;
As to the tables: I suggest you are more consistent with your column names. Why do you call the post ID post_author? One would assume a name here. Just call it post_id in every table. And you don't have to precede columns with abreviations like pho. Just qualify all columns with their tables like I did in my query.
I don't know why this my DELETE sql command got the error number #1064.
My delete sql:
delete from nit.grades g where
(select id_dep from nit.offers as oo,nit.subjects as s where s.id=oo.id_subject and g.id_offer=oo.id)
!=(select id_dep from nit.students as stu where g.id_student=stu.id);
but this sql Select same where clause is working.
select * from nit.grades g where
(select id_dep from nit.offers as oo,nit.subjects as s where s.id=oo.id_subject and g.id_offer=oo.id)
!=(select id_dep from nit.students as stu where g.id_student=stu.id);
thanks for any help.
the Error message:
The syntax with the alias of the table you use for the delete statement is wrong.
Even more in the subqueries you use the target table and this is not allowed in MySql.
Instead you should use joins.
From your code this is what I understood that you want:
delete g
from nit.grades g
inner join nit.offers oo on g.id_offer = oo.id
inner join nit.subjects s on s.id = oo.id_subject
inner join nit.students st on g.id_student = st.id
where st.id_dep <> s.id_dep
In the WHERE clause I'm not sure if the columns id_dep are qualified correctly because they are not qualified also in your code.
If this is not what you want to do then use your SELECT query which does work (as you say) as a join to the table, provided there is a primary key like id in nit.grades:
delete g
from nit.grades g
inner join (
<your select query here>
) t
on t.id = g.id
I've been trying to write some code in SQL, but it keeps coming up with a syntax error regarding the join, and I can't work out why.
SELECT `COUNTRY$`.country_name, `PARTNER$`.partner_name, count(member_id)
FROM `Member$`
Left Join `COUNTRY$`
ON `MEMBER$`.country_id=`COUNTRY$`.country_id
lEFT jOIN `PARTNER$`
on `MEMBER$`.partner_ID = `PARTNER$`.partner_ID
Group By country_name,Partner_name
Any help would be appreciated.
May have something to do with how your table names are in 'thisFormat$'. Also you did not specify which table member_id was coming and group by also doesn't specify which table country_name, partner_name was from.
Try putting aliases on the tablenames and see if that eliminates the problem
SELECT c.country_name, p.partner_name, count(m.member_id)
FROM `Member$` m
left join `COUNTRY$` c on c.country_id = m.country_id
left join `PARTNER$` p on p.partner_id = m.partner_id
GROUP BY c.country_name, p.partner_name
I have the following sql query:
select count(tu.authorID) as c,t.tweettext,tu.name
from tweet t
inner join tweet_user tu on t.authorid=tu.authorid
where count(tu.authorID)>=5;
but it seems that inner join does not work with where in this case and I get the following error:
Error Code: 1111. Invalid use of group function 0.062 sec
Does anyone know what is my problem or how I can do that?
Use HAVING instead of WHERE for aggregate function like COUNT:
SELECT t.tweettext,tu.name, count(tu.authorID) as c
FROM tweet t inner join tweet_user tu on t.authorid=tu.authorid
HAVING count(tu.authorID)>=5
Although mySQL could do away with GROUP BY you could probably include GROUP BY also but I think you don't need the tweettext?
SELECT tu.name, count(tu.authorID) as c
FROM tweet t inner join tweet_user tu on t.authorid=tu.authorid
GROUP BY tu.name
HAVING count(tu.authorID)>=5
For group clauses you need to use
GROUP BY x
HAVING COUNT(x) > 0
http://www.w3schools.com/sql/sql_having.asp
I try to select the the rows with the newest timestamp in change_date from a table in a LEFT JOIN. I really don't know why this query fails:
SELECT
i.ID, i.title, i.create_date,
u1.username creator_name,
u2.username assignee
FROM item i
LEFT JOIN user u1 ON u1.login_IDFK = i.creator_IDFK
LEFT JOIN user u2 ON u2.login_IDFK = i.assigned_to_IDFK
LEFT JOIN (
SELECT MAX(change_date), item_IDFK FROM item_state GROUP BY item_IDFK
) AS ist ON ist.item_IDFK = i.ID
I get the following error
You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near ') AS ist ON ist.item_IDFK = i.ID' at line 2 (Code: 1064)
Query works great without the last LEFT JOIN
(SELECT change_date, item_IDFK FROM item_state GROUP BY item_IDFK)
You are using a group by clause without an aggregate. Each item in the select list must either be represented in the group by clause, or be part of an aggregate expression
I.E.
(Select Max(Change_Date), item_IDFK from item_state group by item_IDFK)
try to save your last subquery in a view table, and after that, left join from that table, and see if the syntax error persists.