Error Aggregates Not Allowed In Where Clause
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Redshift Aggregates Not Allowed In Where Clause
ads with us Stack Overflow Questions Jobs Documentation Tags Users Badges Ask Question x Dismiss Join netezza aggregates not allowed in where clause the Stack Overflow Community Stack Overflow is a community of 4.7 million programmers, just like you, helping each other. Join them; it only takes a error aggregates not allowed in group by clause minute: Sign up How to avoid error “aggregate functions are not allowed in WHERE” up vote 13 down vote favorite 2 With the follow sql code, i get ERROR: aggregate functions are not allowed in WHERE SELECT o.ID , count(p.CAT) FROM
Sql Aggregates Not Allowed In Where Clause
Orders o INNER JOIN Products p ON o.P_ID = p.P_ID WHERE count(p.CAT) > 3 GROUP BY o.ID; How can I avoid this error? mysql sql group-by syntax-error aggregate-functions share|improve this question edited Jan 8 '14 at 9:38 Saharsh Shah 21.4k52356 asked Jan 8 '14 at 9:34 D-Lef 1062615 add a comment| 2 Answers 2 active oldest votes up vote 24 down vote accepted Replace WHERE clause with HAVING, like this: SELECT o.ID , count(p.CAT) FROM Orders o INNER JOIN Products p ON
Postgresql Aggregates Not Allowed In Where Clause
o.P_ID = p.P_ID GROUP BY o.ID HAVING count(p.CAT) > 3; HAVING is similar to WHERE, that is both are used to filter the resulting records but HAVING is used to filter on aggregated data (when GROUP BY is used). share|improve this answer edited Jan 8 '14 at 9:41 answered Jan 8 '14 at 9:35 Aziz Shaikh 11.5k73753 add a comment| up vote 3 down vote Use HAVING clause instead of WHERE Try this: SELECT o.ID, COUNT(p.CAT) cnt FROM Orders o INNER JOIN Products p ON o.P_ID = p.P_ID GROUP BY o.ID HAVING cnt > 3 share|improve this answer edited Jan 8 '14 at 9:43 answered Jan 8 '14 at 9:37 Saharsh Shah 21.4k52356 add a comment| Your Answer draft saved draft discarded Sign up or log in Sign up using Google Sign up using Facebook Sign up using Email and Password Post as a guest Name Email Post as a guest Name Email discard By posting your answer, you agree to the privacy policy and terms of service. Not the answer you're looking for? Browse other questions tagged mysql sql group-by syntax-error aggregate-functions or ask your own question. asked 2 years ago viewed 11371 times active 2 years ago Visit Chat Linked 0 posgresql query to check minimum and maximum data Related 1Aggregate functions - getting columns not included in the GROUP BY clause2SQL using a WHERE statement with an aggregate function7How to generate “empty” aggregate results in SQL1Using case with aggregate fun
8.1 / 8.2 / 8.3 / 8.4 / 9.0 PostgreSQL 8.3.23 Documentation Prev Fast Backward Chapter 2. The SQL Language Fast Forward Next 2.7. Aggregate Functions Like most other relational database products, PostgreSQL supports aggregate aggregate functions are not allowed in where postgres functions. An aggregate function computes a single result from multiple input rows. For example, there
Aggregate Functions Are Not Allowed In Group By Postgres
are aggregates to compute the count, sum, avg (average), max (maximum) and min (minimum) over a set of rows. As an example, we rails aggregate functions are not allowed in where can find the highest low-temperature reading anywhere with: SELECT max(temp_lo) FROM weather; max ----- 46 (1 row) If we wanted to know what city (or cities) that reading occurred in, we might try: SELECT city FROM weather WHERE http://stackoverflow.com/questions/20991729/how-to-avoid-error-aggregate-functions-are-not-allowed-in-where temp_lo = max(temp_lo); WRONG but this will not work since the aggregate max cannot be used in the WHERE clause. (This restriction exists because the WHERE clause determines which rows will be included in the aggregate calculation; so obviously it has to be evaluated before aggregate functions are computed.) However, as is often the case the query can be restated to accomplish the desired result, here by using a subquery: SELECT city FROM weather WHERE temp_lo https://www.postgresql.org/docs/8.3/static/tutorial-agg.html = (SELECT max(temp_lo) FROM weather); city --------------- San Francisco (1 row) This is OK because the subquery is an independent computation that computes its own aggregate separately from what is happening in the outer query. Aggregates are also very useful in combination with GROUP BY clauses. For example, we can get the maximum low temperature observed in each city with: SELECT city, max(temp_lo) FROM weather GROUP BY city; city | max ---------------+----- Hayward | 37 San Francisco | 46 (2 rows) which gives us one output row per city. Each aggregate result is computed over the table rows matching that city. We can filter these grouped rows using HAVING: SELECT city, max(temp_lo) FROM weather GROUP BY city HAVING max(temp_lo) < 40; city | max ---------+----- Hayward | 37 (1 row) which gives us the same results for only the cities that have all temp_lo values below 40. Finally, if we only care about cities whose names begin with "S", we might do: SELECT city, max(temp_lo) FROM weather WHERE city LIKE 'S%'(1) GROUP BY city HAVING max(temp_lo) < 40; (1) The LIKE operator does pattern matching and is explained in Section 9.7. It is important to understand the interaction between aggregates and SQL's WHERE and HAVING clauses. The fundamental difference between WHERE and HAVING is this: WHERE selects input rows before groups and aggregates are computed
| Threaded Open this post in threaded view ♦ ♦ | Report Content as Inappropriate ♦ ♦ Aggregates in WHERE clause? I tried to do the following and got the following error message:select http://postgresql.nabble.com/Aggregates-in-WHERE-clause-td2150790.html employee,count(distinct tasks) from job where greatest(max(last_job_date),max(last_position_date)) < 2008-08-28 + integer '1' group by employee; ERROR: aggregates not allowed in WHERE clause********** Error **********ERROR: aggregates not allowed in WHERE clauseSQL state: 42803Is there away https://www.thunderstone.com/site/texisman/summarizing_values.html around this? Should i create a function to populate a variable that can be used in it's place...will that even work? Stephan Szabo Reply | Threaded Open this post in threaded view ♦ ♦ not allowed | Report Content as Inappropriate ♦ ♦ Re: Aggregates in WHERE clause? On Wed, 10 Sep 2008, Ruben Gouveia wrote: > I tried to do the following and got the following error message: > > select employee,count(distinct tasks) > from job > where greatest(max(last_job_date),max(last_position_date)) < > 2008-08-28 + integer '1' > group by employee; > not allowed in > ERROR: aggregates not allowed in WHERE clause You probably want to look at some variant with HAVING, assuming you intend those max()s to be based on the employee groups. -- Sent via pgsql-sql mailing list ([hidden email]) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-sql Richard Broersma Reply | Threaded Open this post in threaded view ♦ ♦ | Report Content as Inappropriate ♦ ♦ Re: Aggregates in WHERE clause? In reply to this post by Ruben Gouveia-2 On Wed, Sep 10, 2008 at 4:11 PM, Ruben Gouveia <[hidden email]> wrote: > select employee,count(distinct tasks) > from job > where greatest(max(last_job_date),max(last_position_date)) < > 2008-08-28 + integer '1' > group by employee; > > ERROR: aggregates not allowed in WHERE clause > select employee,count(distinct tasks) from job group by employee having greatest(max(last_job_date),max(last_position_date)) < 2008-08-28 + integer '1'; Having clause works on agregates. If you want to force it in the where, you need to put the groupby in a sub-query. -- Regards, Richard Broersma Jr. Visit the Los Angeles PostgreSQL Users Group (LAPUG) http://pugs.postgresql.org/lapug-- Sent via pgsql-sql mailing list (
retrieve and manipulate values from individual rows in a table. In this section, we will illustrate how summary information can be obtained from groups of rows in a table. Often we find it useful to group data by some characteristic of the group, such as department or division, or benefit level, so that summary statistics about the group (totals, averages, etc.) can be calculated. For example, to calculate average departmental salaries, the user could group the salaries of all employees by department. In TEXIS, the GROUP BY clause is used to divide the rows of a table into groups that have matching values in one or more columns. The form of this clause is: GROUP BY column-name1 [,column-name2] ... and it fits into the SELECT expression in the following manner. SELECT column-name1 [,column-name2] ... FROM table-name [WHERE search-condition] [GROUP BY column-name1 [,column-name2] ... ] [ORDER BY column-name1 [DESC] [,column-name2] [DESC] ] ... ; The column(s) listed in the GROUP BY clause are used to form groups. The grouping is based on rows with the same value in the specified column or columns being placed in the same group. It is important to note that grouping is conceptual; the table is not physically rearranged. As an extension Texis also allows the GROUP BY clause to consist of expressions instead of just column names. This should be used with caution, and the same expression should be used in the SELECT as in the GROUP BY clause. This is especially true if the expression will fold multiple values together, such as dividing a number by 1000 to group quantities together if they are in the same 1000. If you select SALARY, and GROUP BY SALARY/1000 you will see one sample salary from the matching group. The GROUP BY clause is normally used along with five built-in, or "aggregate" functions. These functions perform special operations on an entire table or on a set, or group, of rows rather than on each row and then return one row of values for each group. Tablehere lists the aggregate functions available w