Like this:
SELECT s.*, count( logs.* ) as ssh_count
FROM servers s
LEFT JOIN logs ON s.ip_address = logs.server_ip
But I get an error with that query:
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 ssh_count FROM servers s LEFT JOIN logs ON s.ip_address = logs.server_ip LIMIT' at line 1
I think that's because you can't address a table in the count function.
I can do this using a subquery, but that will likely slowly down the query.
What is a better way of doing this?
You can adress a table column, but you can't address table.*, you can do this for example:
SELECT s.*, count( logs.server_ip ) as ssh_count
FROM servers s
LEFT JOIN logs ON s.ip_address = logs.server_ip
Related
I have two tables that I'm trying to connect. One table is called 2019projections and the other is called 2019actualstat. I want to connect the two by names. I'm 99% sure every name that is in 2019actualstat is in 2019projections, but not every name in 2019actualstat is in 2019projections. The latter has alot more names, but most of them are useless.
I've tried left join and right join.
I've tried select distinct
I gave a shot at exists
This is what I have so far:
USE Fantasyfootball;
SELECT DISTINCT *
FROM 2019actualstat;
LEFT JOIN 2019projections ON
2019actualstat.Player =
2019projections.first_last;
It's giving me the 1064 error, but I think it has to do with the 2019projections table having more records.
21:27:26 LEFT JOIN 2019projections ON 2019actualstat.Player =
2019projections.first_last Error Code: 1064. 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 'LEFT JOIN 2019projections ON
2019actualstat.Player = 2019projections.first_last' at line 1 0.00071
sec
2019projections.first_last is a varchar(50) and 2019actualstat.player is text
PS: I have the .csv files which I'm not sure how to post, but I would be happy to send them both.
You're missing the select list, and have a redundant (wrong) semicolon at the end of the from clause:
SELECT *
FROM 2019actualstat
LEFT JOIN 2019projections ON 2019actualstat.Player = 2019projections.first_last;
This it the code I am trying to execute:
SELECT ID_K
FROM koncert,
programi
WHERE koncert.ID_K = programi.ID_K
GROUP BY koncert.ID_K
HAVING COUNT (DISTINCT programi.Salla) = 2
It returns this 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 'DISTINCT programi.Salla)=2 LIMIT 0, 25' at line 4.
Tried to change different things but it still won't work .
You should use the count(DISTINCT programi.Salla
) and not count (..) ..remove space between COUNT and (...
SELECT koncert.ID_K
FROM koncert
INNER JOIN programi on koncert.ID_K = programi.ID_K
GROUP BY koncert.ID_K
HAVING COUNT(DISTINCT programi.Salla) = 2
but you need also tablename for avoid ambiguity and use explicit join sintax too
First you should use qualified name for your column, when column name is same in both table
SELECT ID_K FROM
should be
SELECT programi.ID_K FROM
else, you will get ambiguous column error. Otherwise, your query looks fine except removing extra space when calling COUNT (#spencer already mentioned in comment)
Also, it is good practice to join your table using JOIN (or INNER JOIN, LEFT JOIN etc) keyword, which makes your query more clear and readable.
I have branch table , inventory table and item table. I want to retrieve item id, item name , qty (quantity) and branch name (branch_add).
SELECT tbl_item.item_name ,
tbl_inventory. tbl_item_item_ID , tbl_inventory.qty , tbl_branch.branch_add
FROM tbl_item,tbl_inventory ,tbl_branch
WHERE (tbl_inventory.tbl_item_item_ID = tbl_item.item_ID) JOIN (tbl_branch.branch_ID=tbl_inventory`.tbl_branch_branch_ID)
That is the code which I have wrote but it gives bellow error.
ERROR 1064 (42000): 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 'join item_ID.tbl_item =
tbl_item_item_ID.tbl_inventory' at line 3
Could anyone please help me to solve this. And table will displayed on attached png.
You have a missing AND between your WHERE conditions:
select
tbl_branch_branch_ID.tbl_inventory
, item_name
from tbl_inventory
, tbl_item
, tbl_branch
where
branch_ID.tbl_branch=tbl_branch_branch_ID.tbl_i
and item_ID.tbl_item = tbl_item_item_ID.tbl_inventory;
Also, your JOIN conditions are a little bit off.
I think this is the query you're actually looking for:
select
t_inv.*
, t_itm.item_name
from tbl_inventory t_inv
inner join tbl_item t_itm on t_inv.t_item_item_id = t_itm.item_id
inner join tbl_branch t_br on t_br.branch_id = t_inv.tbl_branch_branch_id
Using explicit JOINs is much better and clearer for reading the code and also can result in improved code performance.
SELECT
tbl_item.item_name,
tbl_inventory.tbl_item_item_ID,
tbl_inventory.qty,
tbl_branch.branch_add
FROM
tbl_item,
tbl_inventory,
tbl_branch
WHERE
(
inner join tbl_item ON tbl_inventory.tbl_item_item_ID = tbl_item.item_ID
inner join branch_ID ON tbl_branch.branch_ID = tbl_inventory.tbl_branch_branch_ID
);
The above query gives syntax error.
I am trying to make a delete from joined same table like this:
DELETE FROM `sp10_seo_url` AS sp1 JOIN
(
SELECT seo_url_pk, COUNT(*) AS maxc
FROM `sp10_seo_url`
GROUP BY seo_url_entity_type, seo_url_entity_id, seo_url_language_fk
HAVING maxc > 1
) AS sp2
ON sp1.seo_url_pk = sp2.seo_url_pk
However I am getting a mysql 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 sp1 JOIN ( SELECT seo_url_pk, COUNT(*) AS maxc FROM `sp10_s' at line 1
And I am not sure at all where the error is. The inner query runs just fine and returns the expected set of results. The "ON" keys are properly named (same since we are talking about the same table).
I guess the idea of the query is pretty clear (clean the table of different rows have the same set of values for the three "group by" columns. Is there another way to do this?
Thanks!
you can "cheat" mysql with a double indirection (as explained here Deleting a row based on the max value):
delete from `sp10_seo_url`
where seo_url_pk in (
select seo_url_pk from (
SELECT seo_url_pk
FROM `sp10_seo_url` sp1,
(
SELECT seo_url_entity_type, seo_url_entity_id, seo_url_language_fk
FROM `sp10_seo_url`
GROUP BY seo_url_entity_type, seo_url_entity_id, seo_url_language_fk
HAVING count(*) > 1
) sp2
where sp1.seo_url_entity_type = sp2.seo_url_entity_type
and sp1.seo_url_entity_id = sp2.seo_url_entity_id
and sp1.seo_url_language_fk = sp2.seo_url_language_fk
) t
);
http://sqlfiddle.com/#!2/899ff5/1
SELECT db1_t1.userid as userid
, db1_t1.customer_id as vw_customer
, db2_t1.customers_id as customer
, db2_t1.orders_id as order
FROM database1.table1 db1_t1
LEFT JOIN database2.table1 db2_t1
ON db1_t1.customer_id = db2_t1.customers_id
It gives me this 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 'order FROM
database1.table1 db1_t1 LEFT JOIN
database2.' at line 2
I am using php and mysql.
order is a keyword - think ORDER BY my_column.
I'd suggest renaming it, but you could enclose it in backticks
db2_t1.orders_id AS `order`