The following query (this is a condensed form) is running fine with user defined variables selected as an alias on MySQL v5.6.20 BUT breaks on MySQL v8.0.23
SELECT *, #rank := #rank + 1 AS rank
FROM q39wg_comments;
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 'rank
So I finally figured it out, It was happening because rank is now a reserved keyword in MySQL 8.x.x as described here.
Once I updated the variable name, the query started working.
Another alternative is to use back-ticks which I think is more future proof as more keywords get reserved, it will prevent your SQL from breaking unnecessarily. Eg. The following works fine on MySQL v8.x.x
Eg:
SELECT *, #rank := #rank + 1 AS `rank`
FROM q29wg_jreviews_comments ;
you must initialize #rank
try this:
SELECT *, #rank := #rank + 1 AS myrank
FROM q39wg_comments
JOIN ( SELECT #rank:=0 ) AS init;
see https://dbfiddle.uk/?rdbms=mysql_8.0&fiddle=97b2c82bac1c4c2f5008a6e5f8298e04
Related
I need to apply a Rank function in MYSQL 5.6.10. The issue is, I am getting a syntax error when i am using the standard syntax i found online
Eg:
INSERT INTO t(val)
VALUES(1),(2),(2),(3),(4),(4),(5);
SELECT
val,
RANK() OVER (
ORDER BY val
) my_rank
FROM
t;
I am getting a red line suggesting a syntax error near 'OVER ('
As far as i know window functions are introduced after version 8 and above.
source
Something like this may give you some insights.
SELECT
val,
(select 1+count(*) from t b where t.val>b.val)"rank"
FROM
t;
Demo
RANK is only available in MySQL-8.0+
My query is:
SELECT *,
ROW_NUMBER() OVER (ORDER BY score ASC)
FROM submissions
The error message I receive is:
#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 '(ORDER BY score ASC) FROM submissions LIMIT 0, 25' at line 2
I am running this query in phpMyAdmin. I notice that OVER is not colored blue, nor does is it suggested as I type, unlike other command words (ORDER, ASC, etc).
This simpler query runs just fine:
SELECT * FROM submissions
I've tried putting things in quotes, using the RANK function instead, and fiddling with whitespace, but the query still doesn't run. What is wrong here?
My guess is that you are running a version of MySQL which is earlier than 8+, one which does not support ROW_NUMBER. There are a few options for simulating ROW_NUMBER in earlier versions of MySQL. One is to use user variables:
SELECT *,
(#row_number:=#row_number + 1) AS rn
FROM submissions, (SELECT #row_number := 0) tmp
ORDER BY score;
Hello I am trying to create a view in MySQL but I am getting syntax error # 1064 i.e
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 'SET #csum := 0; at line 3
Here how can I fix this variable issue any solution or alternate method to calculate running balance with ease
Here is my code
SET #csum := 0;
SELECT
tblleasesalesschedule_details.LeaseSaleID,
tblleasesalesschedule_details.ScheduleSr,
tblleasesalesschedule_details.InstallmentName,
tblleasesalesschedule_details.InstallmentSr,
tblleasesalesschedule_details.ScheduleDate,
tblleasesalesschedule_details.Amount,
IFNULL(tblleasesalespayment.Amount, 0) AS AmountPaid,
(coalesce(tblleasesalesschedule_details.Amount, 0) - coalesce(tblleasesalespayment.Amount, 0)) As BalanceAmount,
(#csum := #csum + (coalesce(tblleasesalesschedule_details.Amount, 0) - coalesce(tblleasesalespayment.Amount, 0))) as RunningBalance,
tblleasesalespayment.PaymentDate
FROM
tblleasesalespayment
RIGHT JOIN tblleasesalesschedule_details ON tblleasesalesschedule_details.InstallmentSr = tblleasesalespayment.InstallmentSr
WHERE
tblleasesalesschedule_details.PayDate < NOW();
You should avoi the use of var ins a view
A view definition is subject to the following restrictions:
(From Mysql Doc ) http://dev.mysql.com/doc/refman/5.6/en/create-view.html
The SELECT statement cannot contain a subquery in the FROM clause.
The SELECT statement cannot refer to system variables or user-defined
variables.
Within a stored program, the SELECT statement cannot refer to program
parameters or local variables.
The SELECT statement cannot refer to prepared statement parameters.
Any table or view referred to in the definition must exist. If, after
the view has been created, a table or view that the definition refers
to is dropped, use of the view results in an error. To check a view
definition for problems of this kind, use the CHECK TABLE statement.
The definition cannot refer to a TEMPORARY table, and you cannot
create a TEMPORARY view.
You cannot associate a trigger with a view.
Aliases for column names in the SELECT statement are checked against
the maximum column length of 64 characters (not the maximum alias
length of 256 characters).
if you need the use of param take a look at function or procedure http://dev.mysql.com/doc/refman/5.7/en/create-procedure.html
I need to order rows in MySQL and assign a number to each row according to that order. ORDER BY is working as intended but not ROW_NUMBER().
This works:
USE my_database;
SELECT
id
,volume
FROM my_table
ORDER BY volume;
This does not work:
USE my_database;
SELECT
id
,volume
,ROW_NUMBER() over(ORDER BY volume)
FROM my_table
ORDER BY volume;
I get this error message:
SELECT id ,volume ,ROW_NUMBER() over(ORDER BY volume) FROM my_table ORDER BY volume 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 '(ORDER BY volume) FROM my_table ORDER BY vol' at line 4 0.000 sec
What am I doing wrong and how do I make it work?
I also tried RANK() and DENSE_RANK() which gives the same problem.
There are no such things as ROW_NUMBER() or RANK() in MySQL. Try the following :
USE my_database;
SET #row_number = 0;
SELECT id
, volume
, #row_number := #row_number + 1 AS rank
FROM my_table
ORDER BY volume;
The function ROW_NUMBER() does not exist in MySQL.
However, you can replicate it, possibly: http://www.mysqltutorial.org/mysql-row_number/
The row_number is a ranking function that returns a sequential number
of a row, starting from 1 for the first row. We often want to use the
row_number function to produce the specific reports we need.
Unfortunately, MySQL does not provide row_number like Microsoft SQL
Server and Oracle. However, in MySQL, you can use session variables to
emulate the row_number function.
example:
SET #row_number = 0;
SELECT
(#row_number:=#row_number + 1) AS num, firstName, lastName
FROM
employees
LIMIT 5;
MySQL introduced the ROW_NUMBER() function since version 8.0.
I have the follwoing mysql table called user
user email count ranking
sss sss#gmail.com 111 0
ss ss#ggmail.con 11 0
s s#gmai.com 1 0
I try to use follwing mysql qyery to update the ranking
SET #r=0; UPDATE table user SET ranking= #r:= (#r+1) ORDER BY count ASC;
but it give me errors, I don't know where I did wrong, any one could help me with that? thanks a lot!
errors:
SQL query:
UPDATE TABLE user SET ranking = #r := ( #r +1 ) ORDER BY count ASC ;
MySQL said:
#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 'table user SET ranking= #r:= (#r+1) ORDER BY count ASC' at line 1
TABLE is a MySQL reserved keyword. Enclose it in backquotes when using it as an identifier, but in this case, it is unnecessary and should be removed.
SET #r=0; UPDATE user SET ranking= #r:= (#r+1) ORDER BY count ASC;
Note that 99% of the time, the error message will point exactly to the character or word in the query causing problems. Look to the first word after the ' in the error to start narrowing your problem.
> for the right syntax to use near 'table