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Summary of article content: Articles about Oracle / PLSQL: ORA-00937 Error Message Learn the cause and how to resolve the ORA-00937 error message in Oracle. You tried to execute a SELECT statement that included a GROUP BY function (ie: MIN … …
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Summary of article content: Articles about ORA-00937: not a single-group group function tips ORA-00937: not a single-group group function tips … Cause: A SELECT list cannot include both a group function, such as AVG, COUNT, MAX, MIN, SUM, STDDEV, or … …
Most searched keywords: Whether you are looking for ORA-00937: not a single-group group function tips ORA-00937: not a single-group group function tips … Cause: A SELECT list cannot include both a group function, such as AVG, COUNT, MAX, MIN, SUM, STDDEV, or … ORA-00937: not a single-group group function tipsORA-00937: not a single-group group function tips
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ORA-00937: not a single-group group function tips

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Summary of article content: Articles about Oracle Native wrapper(Net8 wrapper) error: SQL1822N: “ORA-00937: not a single-group group function” Oracle’s error message is “ORA-00937: not a single-group group function”. Its meaning is “A SELECT list cannot include both a group function … …
Most searched keywords: Whether you are looking for Oracle Native wrapper(Net8 wrapper) error: SQL1822N: “ORA-00937: not a single-group group function” Oracle’s error message is “ORA-00937: not a single-group group function”. Its meaning is “A SELECT list cannot include both a group function … Run query by using net8 wrapper:SELECT empname,salary FROM employee x WHERE exists (SELECT salary + 10000 FROM depta08 WHERE salary = x.salary UNION SELECT avg(salary) FROM depta08 WHERE salary = x.salary)EMPNAME SALARY ——————– ———-SQL1822N Unexpected error code “937” received from data source “DATASTORE2”.Associated text and tokens are “ORA-00937: not a single-group group function”. SQLSTATE=560BD
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Oracle Native wrapper(Net8 wrapper) error: SQL1822N: “ORA-00937: not a single-group group function”

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Summary of article content: Articles about ORA-00937: not a single-group group function Solution – Database Star The ORA-00937 error occurs when a query has an aggregate function (e.g. COUNT, MIN, MAX, SUM, or AVG) as well as other fields or statements, but there is no … …
Most searched keywords: Whether you are looking for ORA-00937: not a single-group group function Solution – Database Star The ORA-00937 error occurs when a query has an aggregate function (e.g. COUNT, MIN, MAX, SUM, or AVG) as well as other fields or statements, but there is no … Have you received an ORA-00937: not a single-group group function error? Learn what it is and how to fix it in this article.
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ORA-00937 not a single-group group function

ORA-00937 Solution

Solution 1 Add the expressions into the GROUP BY clause

Solution 2 Remove the expression from the SELECT clause

Solution 3 Remove the aggregate function

ORA-00937: not a single-group function

ORA-00937

Error ORA-00937 occurs when the GROUP BY command is improperly used. The GROUP BY command allows the user to view rows having a common field value in a single row. For example, a small business CEO wants to view employees who worked the highest number of hours by department last month. Another instance could be when a school superintendent wants to view students on the honor roll by homeroom. In such cases, the user may run a GROUP BY statement to view the results.

GROUP BY is used in conjunction with aggregate functions to filter the results by a value. The GROUP BY command can be very useful for viewing a select set of results. It is commonly used, which deems it essential to utilize the proper syntax when running the statement.

The Problem

When faced with ORA-00923, the error message you will see is

ORA-00923: not a single-group group function

Oracle documentation states the cause as the following:

A SELECT list cannot include both a group function, such as AVG, COUNT, MAX, MIN, SUM, STDDEV, or VARIANCE, and an individual column expression, unless the individual column expression is included in a GROUP BY clause.

In other words, you tried to execute a SELECT statement that requires a GROUP BY clause without including the GROUP BY clause. If you are using an aggregate function in your select query (e.g. AVG, COUNT, MAX, MIN…), you must have a GROUP BY clause.

The Solution

To resolve the error, you can either remove the group function or column expression from the SELECT clause or you can add a GROUP BY clause that includes the column expressions.

If you choose to add the GROUP BY clause, make sure to include the column expressions and follow the correct order. Take the example of the small business CEO who wants to view a list of employees who worked the most number of hours, organized by department. The correct syntax that includes the GROUP BY clause would be

SELECT department, MAX(hours) AS “most hours”

FROM employees

GROUP BY department;

Looking Forward

Remember, if you are using an aggregate function in your select query then you must also have a GROUP BY clause. You cannot refer to a nonaggregated column in SELECT that is not also named in the GROUP BY clause. For the query to run successfully you must either remove the group function or column expression from SELECT or you must add a GROUP BY clause that includes the column expression.

Following this rule and ensuring proper query syntax should prevent error ORA-00937 from occurring in the future. Even though the process of correcting this error is not too difficult, contact your database administrator or licensed Oracle consultant if you continue to face problems with ORA-00937.

How to resolve ORA-00937: not a single-group group function when calculating percentage?

I’m trying to get a percentage of the itemid that are available in a certain area. Using my query, I get an error ORA-00937: not a single-group group function

All the details:

I have these two tables:

ALLITEMS ————— ItemId | Areas ————— 1 | EAST 2 | EAST 3 | SOUTH 4 | WEST CURRENTITEMS ————— ItemId ————— 1 2 3

and want this result:

————— Areas| Percentage ————— EAST | 50 –because ItemId 1 and 2 are in currentitems, so 2 items divided by the total 4 in allitems = .5 SOUTH | 25 –because there is 1 item in currentitems table that are in area SOUTH (so 1/4=.25) WEST | 0 –because there are no items in currentitems that are in area WEST

The DDL:

drop table allitems; drop table currentitems; Create Table Allitems(ItemId Int,areas Varchar2(20)); Create Table Currentitems(ItemId Int); Insert Into Allitems(Itemid,Areas) Values(1,’east’); Insert Into Allitems(ItemId,areas) Values(2,’east’); insert into allitems(ItemId,areas) values(3,’south’); insert into allitems(ItemId,areas) values(4,’east’); Insert Into Currentitems(ItemId) Values(1); Insert Into Currentitems(ItemId) Values(2); Insert Into Currentitems(ItemId) Values(3);

My Query:

Select areas, ( Select Count(Currentitems.ItemId)*100 / (Select Count(ItemId) From allitems inner_allitems Where inner_allitems.areas = outer_allitems.areas ) From Allitems Inner_Allitems Left Join Currentitems On (Currentitems.Itemid = Inner_Allitems.Itemid) Where inner_allitems.areas = outer_allitems.areas ***group by inner_allitems.areas*** ***it worked by adding the above group by*** ) “Percentage Result” From allitems outer_allitems Group By areas

The error:

Error at Command Line:81 Column:41 (which is the part `(Select Count(ItemId) From allitems inner_allitems Where inner_allitems.areas = outer_allitems.areas )`) Error report: SQL Error: ORA-00937: not a single-group group function

When I run the exact same query in SQL Server, it works fine. How do I fix this in Oracle?

ORA-00937: not a single-group group function tips

ORA-00937: not a single-group group function tips Oracle Error Tips by Burleson Consulting Oracle docs note this about ORA-00937: ORA-00937 not a single-group group function

Cause: A SELECT list cannot include both a group function, such as AVG, COUNT, MAX, MIN, SUM, STDDEV, or VARIANCE, and an individual column expression, unless the individual column expression is included in a GROUP BY clause.

Action: Drop either the group function or the individual column expression from the SELECT list or add a GROUP BY clause that includes all individual column expressions listed. Here is another example of a user encountering ORA-00903 from the OraFAQ forums: Question: I am trying to use a function that I created which will calculate my customer’s bills, including discounts. However, every time I try to use the function, I receive ORA-00903. Any suggestions? Answer: You are missing the GROUP BY clause in your function. Try to take the SQL out and run it in SQL*Plus until it works again. ORA-00937 can probably be detected during compile, but even if the function shows that it has been compiled, errors such as ORA-00937 may still be thrown. Also, ORA-00937 may be occurring because of your SELECT clause. Note that COUNT() and SUM() have to be grouped by all members in the SELECT clause.

So you have finished reading the ora 00937 topic article, if you find this article useful, please share it. Thank you very much. See more: Lỗi ORA-00937, ora-00979: not a group by expression, ORA-00936, Lỗi ORA-00933, Count(*) over oracle, ORA-00920: invalid relational operator, Single-row subquery returns more than one row, ORA-00934: group function is not allowed here

Top 11 Ora 00937 Trust The Answer

sql – How to resolve ORA-00937: not a single-group group function when calculating percentage? – Stack Overflow

Oracle / PLSQL: ORA-00937 Error Message

ORA-00937: not a single-group group function tips

Oracle Native wrapper(Net8 wrapper) error: SQL1822N: “ORA-00937: not a single-group group function”

ORA-00937: not a single-group group function Solution – Database Star

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ORA-00937: not a single-group group function – IT Tutorial

ORA-00937: not a single-group function

How to resolve ORA-00937: not a single-group group function when calculating percentage?

ORA-00937: not a single-group group function tips

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