Group by concatenate oracle I don't know what it would be in Oracle or anything but this could be a good place to start Apr 11, 2013 · For appeals, questions and feedback about Oracle Forums, please email oracle-forums-moderators_us@oracle. If the GROUP BY clause is omitted, the entire query result is treated as one group. The first uses the || operator: select 'Join these ' || 'strings with a number ' || 23 from dual; result Join these strings with a number 23 You can see from above that Oracle took care of transforming the number to a string to attach it to the rest. Jul 23, 2025 · In this article, we will discuss how to concatenate text from multiple rows into a single text string in SQL Server using various methods which are COALESCE Function, XML PATH Function, and STUFF Function with XML PATH and Group By Clause. Oct 8, 2012 · Concatenate multiple results into one row When I query a database that includes a particular field (Condition), it returns multiple rows of Conditions associated with the same result from another column (NCT_ID). For example, SELECT SUM (revenue), department FROM sales_table GROUP BY department;Here revenue is a NUMBER fi Jan 6, 2012 · Hello, We are on Oracle 11g and would like to concatenate multiple rows. Thank you! Interested in getting your voice heard by members of the Developer Marketing team at Oracle? Check out this post for AppDev or this post for AI focus group information. The LISTAGG aggregate function orders the rows for each group in a query according to the ORDER BY expression and then concatenates the values into a single string. Please can anybody suggest me how to do that i Let's say I have 3 columns: p_id, description, order_by. Feb 8, 2007 · For appeals, questions and feedback about Oracle Forums, please email oracle-forums-moderators_us@oracle. 1. com. I am using LISTAGG function. One possible solution is to use the LISTAGG function, which concatenates the values of a column within each group into a single string. MySQL you can do: SELECT value, GROUP_CONCAT (ID) AS IDs FROM TEST GROUP BY value SQL Server is nearly identical with STRING_AGG so long as you're running SQL SERVER 2017 or after. I am getting an error by using the below syntax: In the Data Item Expression … This tutorial shows you how to use the LISTAGG function, which is used to aggregate a set of string values within a group into a single string. Use LINQ to concatenate This is exactly what I want to do, but without LINQ. Solution: Oracle has few methods to perform string aggregation. If GROUP_CONCAT() is invoked from within the mysql client, binary string results display using hexadecimal notation, depending on the value of the --binary-as-hex. Mar 1, 2014 · My Oracle Database is version 10g Enterprise Edition Release 10. Mar 19, 2015 · Can You Use Oracle CONCAT on Rows and Group By Rows? If you want to concatenate values from multiple rows in Oracle, then you don't need to use the CONCAT function. is there something quivalent in oracle or some way ar Jun 2, 2008 · Hi, I'd like to concatenate attributes on a vertical basis when I perform a Group by For example: TABLE_TEST ID STATUS 1003 PL 1003 OP 1003 OP I am looking for ID STATUS 1003 PL, OP, OP The query Jul 7, 2025 · The following functions are used with operators in a data flow, to enable you to build expressions. How to concatenate string belonging to group by clause. Sep 7, 2017 · Concatenate the rows WITH NO column to group Hello Experts,I am preparing some stored procedure and there is a need to group the result into a string with any delimiter. May 19, 2000 · Function to concatenate output Hi,Is there some way to concatenate the output of a select query to a single record. It is commonly used for grouped string aggregation. Oct 20, 2013 · hi I have following function for string aggregation in oracle CREATE OR REPLACE FUNCTION STRING_AGGREGATE(i_query VARCHAR2, i_seperator VARCHAR2 DEFAULT ',') RETURN VARCHAR2 AS l_return CLOB:='' The result type is TEXT or BLOB unless group_concat_max_len is less than or equal to 512, in which case the result type is VARCHAR or VARBINARY. Note that Feb 16, 2022 · SELECT distinct group, CONCAT(select distinct provider from data) FROM data GROUP BY 1 i have to concatenate the employee and his department and group them by their department and the name of the employee to get the result. Aug 12, 2020 · The CONCAT() function joins the input strings or different column values and returns as a single string. If you see the below table, the name is ITEM ID COUNT_ITEM ITEM_NAME 1 2 item1 1 3 item2 2 3 item1 3 5 item2 3 2 item4 3 1 item6 We would like to show you a description here but the site won’t allow us. 1. A similar question was asked somewhere here 2074419 but the suggested method ( given on that pag May 27, 2013 · Is there any function in oracle similar to group_concat in mysql? [duplicate] Asked 12 years, 6 months ago Modified 7 years, 6 months ago Viewed 122k times May 13, 2002 · For appeals, questions and feedback about Oracle Forums, please email oracle-forums-moderators_us@oracle. Oct 26, 2017 · It's a common operation in DB to have a need of grouping and concatenating several columns in the output result of the query. How it would work: Under “function” the user selects “Listagg” (or Nov 27, 2024 · Learn about different ways to concatenate strings in Oracle, including CONCAT and CONCAT_WS functions and the '||' operator. Sep 24, 2012 · If there were only one column in the table, I could concatenate the records by doing the following, but with grouping in the context, I really don't have much idea. Please notice that the built-in Jan 21, 2020 · Is it possible to write a single SQL query that would concatenate multiple rows into a single row with multiple columns? For example, I have a table with the following data: Jul 30, 2014 · LISTAGG lets you concatenate multiple rows of data into a single delimiter-separated string. It can be used to aggregate values from groups of rows and return a concatenated string where the values are typically separated by a comma or semi-colon - you can determine this yourself within the code by supplying Feb 26, 2008 · For appeals, questions and feedback about Oracle Forums, please email oracle-forums-moderators_us@oracle. Jul 18, 2019 · 所有版本的oracle都可以使用select wm_concat (name) as name from user; 但如果是oracle11g，使用select listagg (name, ',') within group ( order by name) as name from user; 效率更高，官方也更推荐这种写法。 注意：wm_concat 运行后的返回结果根据oracle的版本不同而会字段类型不同，在oracle11g中返回clob型，在oracle10g中返回varchar型 Jan 27, 2024 · The GROUP_CONCAT() function in MySQL is a powerful tool when working with aggregations. Learn how to avoid errors due to concatenated values generated by the LISTAGG function, exceeding the maximum length supported by VARCHAR2. 2 Hello Team, may I know how to group by concatenated field GBALID? This field will serve as a unique key for the table. However, if we need to concatenate rows of strings (rows from the same column) into a single… This tutorial shows you how to use the Oracle GROUP BY clause to group rows into groups and aggregate values for each. See the following SO question for help: "How to get multiple records against one record based on relation?" Hello this might be a very common question. 2) should do the trick nicely. expr が数値、文字列、日付の場合には文字列に暗黙変換され文字列として戻される。 RAW 型の場合には RAW 型が戻される。 MySQL における group_concat 関数の Oracle 版である。 LISTAGG 使用例 LISTAGG 関数 サンプルデータ A 1 2 B 1 2 Is there a SQL statement that will do this? I am using Oracle. Jan 17, 2024 · 文章浏览阅读2. For example if you want to get make an report for people based on their country from a table containing both the country and the person: Example 1. Sep 4, 2021 · はじめに MySQLにはgroup_concat()という関数があり、GROUP BYの結果セットをカンマなどで連結して取得することができます。 Oracleに同じような機能がないかと調べてみた所、LISTAGG()という関数があることが分かったので、試しに使ってみました Feb 8, 2007 · Hi, I have a doubt how to concatenate VARCHAR2 data grouped. That's alright… figured I'd get the conversation started :) Many users when they start to explore the capabilities of the interactive report wish to see a “listagg” option in the “Group by”. class;我们会发现这样 Sep 22, 2016 · New SQL developer here, how do I make a DISTINCT CONCAT statement? Here is my statement without the DISTINCT key: COLUMN Employee FORMAT a25; SELECT CONCAT(CONCAT(EMPLOYEEFNAME, ' '), EMPLOYEELNA Mar 26, 2014 · I have a table which contains comma delimited values in a few columns. I am trying to do the following: I would like to concatenate the description for all like p_id values. Related questions: Returning multiple rows from a single row My question is close to the opposite of this question. CONCAT Syntax concat::= Description of the illustration concat. Oct 30, 2012 · SELECT efforts_id, wm_concat(cycle_name), wm_concat(release_name) FROM MY_TABLE GROUP BY efforts_id Hmmm, just found this: Note that WM_CONCAT is undocumented and unsupported by Oracle, meaning it should not be used in production systems The LISTAGG function, which can produce the same output as WM_CONCAT is both documented and supported by Oracle. com Nov 22, 2024 · Our goal is to group the names by their corresponding group names and concatenate the names in one column for each group. For example, SELECT SUM (revenue), department FROM sales_table GROUP BY department;Here revenue is a NUMBER fi Reference Function and stored procedure reference Aggregate LISTAGG Categories: Aggregate functions (General) , Window function syntax and usage (General) LISTAGG Returns the concatenated input values, separated by the delimiter string. Converting GROUP_CONCAT: Oracle: Oracle supports LISTAGG function that can concatenate the values within a group. 0 - 64bit I have the following statement which usefully gets me the max (or min or count etc) values in each case as expected however what I would like is to get and to concatenate all of the values rather than the max, min or count - is there an elegant way to do this please ? Sep 10, 2015 · Questions Concatenate Multiple Rows of Data into One Question and Answer Thanks for the question. This Oracle tutorial explains how to use the Oracle / PLSQL LISTAGG function with syntax and examples. 0 - 64bit Production Viewed 10K+ times! This question is Jul 22, 2025 · “SQL String Concatenation in Group: Best Practices & Solutions” When working with relational databases, a frequent requirement is to aggregate values from multiple rows into a single string, often delimited by a specific character. May 2, 2000 · String concatenation How do I concatenated two columns into one? In my book the line to do this is vertical and I'm not sure how to type that? thanks Mickey Jan 3, 2011 · String Concatenation Hi Tom,Is there anyway that I can just use SQL to do stringconcatenation on a VARCHAR2 field much the same waythat a SUM () function is used on a NUMBER field. By default, the delimiter is empty string, so we can to specify comma explicitly: SELECT state, LISTAGG (city, ',') WITHIN GROUP (ORDER BY NULL) FROM cities GROUP BY state; Result: Learn how to use the Oracle LISTAGG() function to transform data from multiple rows into a list of values separated by a delimiter. Idea Summary For years I have expected this feature, but surprisingly it still isn't in the latest version of APEX. So we are talking a group by p_id This is so ugly, with respect to an very old-brand DBMS. 4. The GROUP BY statement is often used with aggregate functions (COUNT(), MAX(), MIN(), SUM(), AVG()) to group the result-set by one or more columns. Setup GROUP BY ROLLUP CUBE GROUPING Functions Jan 29, 2004 · Hi All, I would like format an output of following query in such a way to see concatenated COLUMN_NAME after grouping by TABLE_NAME and CONSTRAINT_NAME. Oracle supports ANSI string data types plus a set of built-in data types such as: CHAR , VARCHAR2 ,NCHAR , and NVARCHAR2. for ex. I would like to concatenate the comma delimited values and remove duplicates. I'm using the code below to concatenate the values This Oracle tutorial explains how to use the Oracle GROUP BY clause with syntax and examples. Aug 29, 2025 · Master Oracle SQL LISTAGG function for string aggregation with practical examples, syntax guide, and performance tips. Oracle provides the CONCAT character function as an alternative to the vertical bar operator for cases when it is difficult or impossible to control translation performed by operating system or network utilities. The most common usuage you popularly find on internet is to convert multiple rows to a single row with a delimiter. Asked: September 10, 2015 - 11:08 am UTC Last updated: September 10, 2015 - 4:08 pm UTC Version: Oracle Database 11g Enterprise Edition Release 11. Area SQL General Contributor Chris Saxon (Oracle) Created Monday October 03, 2022 ROLLUP, CUBE, GROUPING Functions and GROUPING SETS - ORACLE-BASEHome » Articles » Misc » Here ROLLUP, CUBE, GROUPING Functions and GROUPING SETS This article gives an overview of the functionality available for aggregation in data warehouses, focusing specifically on the information required for the Oracle Database SQL Expert (1Z0-047) exam. How it would work: Under “function” the user selects “Listagg” (or Learn how to effectively concatenate strings in Oracle SQL using operators and functions, and explore best practices for data manipulation. Technical questions should be asked in the appropriate category. These functions enable users to concatenate Ya había formulado esto resumido en un post anterior, pero he decidido hacer la pregunta complete porque no me ha ayudado mucho: Tengo las siguientes tablas: Tabla 1 con los objetos y las version Feb 13, 2025 · The LIST_AGG function in Oracle is used to concatenate values from multiple rows into a single string with a specified delimiter. If you omit the GROUP BY clause, then Oracle applies aggregate functions in the select list to all the rows in the queried table or view. Concat values with group by in Oracle Asked 11 years, 4 months ago Modified 11 years, 4 months ago Viewed 4k times Jul 14, 2025 · Learn how to concatenate column values from multiple rows in Oracle using SQL functions like LISTAGG, XMLAGG, and Collect. Dec 26, 2019 · Hope this will help you save few hours that i spent figuring out which function is supported in Responsys to concatenate text form multiple rows into a single text string, while ensuring there are no duplicates Responsys SQL does not support: Jun 6, 2014 · For appeals, questions and feedback about Oracle Forums, please email oracle-forums-moderators_us@oracle. Oracle applies the aggregate functions to each group of rows and returns a single result row for each group. Jan 22, 2009 · The WM_CONCAT function (if included in your database, pre Oracle 11. Thank you! Jun 29, 2015 · What is the string concatenation operator in Oracle SQL? Are there any "interesting" features I should be careful of? (This seems obvious, but I couldn't find a previous question asking it). By using functions such as GROUP_CONCAT in MySQL or LISTAGG in Oracle, users can aggregate multiple strings into a single value, making data analysis and reporting more efficient and effective. What is the syntax in Congos for LISTAGG. It involves taking one or more strings from a set of records and combining them into a single cohesive string. The easiest way to convert data types is to use CAST function. We would like to show you a description here but the site won’t allow us. is there something quivalent in oracle or some way ar This tutorial demonstrates how to utilize the Oracle CONCAT() function to concatenate two strings into a single string. Syntax Aggregate function Dec 4, 2020 · Problem Statement: You want to perform string concatenation as a comma delimited text in oracle. What is string concatenation in Oracle? String concatenation in Oracle refers to the process of combining two or more strings As a group-set aggregate, the function operates on and returns an output row for each group defined by the GROUP BY clause. May 12, 2023 · Guide to Oracle GROUP_CONCAT. The string returned is in the same character set as char1. in SQL Anywhere there is a function LISTselect list (tname) from tab;would give a comma seprate list of all the values in tname column. 2. gif Purpose CONCAT returns char1 concatenated with char2. Jul 23, 2025 · In this article, we'll explore the versatile GROUP BY clause in SQL and how it can be used to concatenate strings efficiently. On the left is the table and on the right is the concatenated output: Nov 23, 2021 · Some RDBMSs have a GROUP_CONCAT() function that allows you to return a query column as a delimited list (for example, a comma separated list). As an analytic function, LISTAGG partitions the query result set into groups based on one or more expression in the query_partition_clause. Script Name How to combine rows into CSV strings using LISTAGG Description Examples of how to concatenate rows into a list of values using LISTAGG. Apr 5, 2009 · Demonstrates usage of MODEL clause in Oracle 10g to emulate an aggregate function that concatenates strings in each group similar to GROUP_CONCAT This type of problem is solved easily on MySQL with its GROUP_CONCAT() aggregate function, but solving it on Microsoft SQL Server is more awkward. Its datatype depends on the datatypes of the arguments. Oracle GROUPING SETS Summary: in this tutorial, you’ll learn how to use the Oracle GROUPING SETS expression to generate multiple groupings within a query. Here we discuss How Does the Function Group_Concat Work along with the examples and queries in detail. May 3, 2020 · Group by a col and concatenate two non group by col in oracel Ask Question Asked 5 years, 6 months ago Modified 5 years, 6 months ago How can I achieve the following in oracle without creating a stored procedure? Data Set: question_id element_id 1 7 1 8 2 9 3 10 3 Oracle applies the aggregate functions to each group of rows and returns a single result row for each group. The Oracle / PLSQL LISTAGG function concatenates values of the measure_column for each GROUP based on the order_by_clause. Feb 25, 2008 · I tried a user-defined aggregate function to concatenate the column values into one string in a row as below, but wanted to ask your comments on for another more performant way for this need since the May 2, 2000 · String concatenation How do I concatenated two columns into one? In my book the line to do this is vertical and I'm not sure how to type that? thanks Mickey Concatenate multiple result rows of one column into one, group by another column [duplicate] Asked 12 years, 7 months ago Modified 2 years, 8 months ago Viewed 381k times Oracle® Database SQL Language Reference 21c F31301-18 May 2025 This tutorial shows you how to use the LISTAGG function, which is used to aggregate a set of string values within a group into a single string. With the new DISTINCT keyword, duplicate values can be removed from the specified expression before concatenation into a single string. Would it be possible to construct SQL to concatenate column values from multiple rows? The following is an example: Table A PID A B C Table B PID SEQ Desc A 1 Have A 2 a Jul 9, 2021 · Oracle DB 12. Mar 30, 2022 · Oracle RDBMS 11gR2 introduced the LISTAGG function for working with string values. How to Concatenate Strings in Oracle Oracle offers two ways to concatenate strings. 12 I need a way to make a concatenation of all rows (per group) in a kind of window function like how you can do COUNT(*) OVER(PARTITION BY) and the aggregate count of all rows per group will repeat across each particular group. Introduction to the Oracle GROUPING SETS expression In Oracle, the GROUP BY clause allows you to group rows into multiple groups based on values in one or more columns. Explore 7 methods with SQL query syntax and examples using the JustLee book database. A 1 2 B 1 2 Is there a SQL statement that will do this? I am using Oracle. It allows you to summarize the data in a comma separated list. It enables the creation of a concatenated string result from a group of rows. This is particularly useful for reporting or preparing data for other applications. But i can't have a concat into a group by like this with oracle: Apr 10, 2007 · For appeals, questions and feedback about Oracle Forums, please email oracle-forums-moderators_us@oracle. This tutorial introduces the LISTAGG function, provides working examples, and provides a comparison with a similar aggregate function, XMLAGG. I need something similar but a string concatenation of all values per group repeated across each group. Due to the frequency of this operation, databases offer specialized functions to handle it efficiently. For example, you might have a table of products associated with different Jul 18, 2023 · Idea Summary For years I have expected this feature, but surprisingly it still isn't in the latest version of APEX. For example, this gets a comma-delimited list of the table names in your schema: Oct 8, 2012 · Concatenate multiple results into one row When I query a database that includes a particular field (Condition), it returns multiple rows of Conditions associated with the same result from another column (NCT_ID). By the end, you'll grasp the fundamentals of using GROUP BY for string concatenation and be equipped with practical examples to implement in our projects. Dec 21, 2023 · String Concatenation Hi Tom,Is there anyway that I can just use SQL to do stringconcatenation on a VARCHAR2 field much the same waythat a SUM () function is used on a NUMBER field. String aggregation functions are powerful tools in database management that allow users to combine and manipulate string values within a database query. The Oracle GROUP BY clause is used in a SELECT statement to collect data across multiple records and group the results by one or more columns. Feb 20, 2009 · Hi, I´m looking for a solution to concat a string from a group by clause. To display the contents of two columns or more under the name of a single column, you can use the double pipe concatenation operator (||). SELECT str, COUNT(*) AS count FROM (SELECT GROUP_CONCAT(str ORDER BY str SEPARATOR '') AS str FROM data GROUP BY i) d GROUP BY str ORDER BY str Demo on SQLFiddle In Oracle you can use LISTAGG: Mar 30, 2022 · Oracle RDBMS 11gR2 introduced the LISTAGG function for working with string values. Learn how to use the MySQL `GROUP_CONCAT()` function for creating comma-separated lists from grouped results, with syntax, examples, and best practices for optimal performance. CREATE MATERIALIZED VIEW OFSTRIM. Dec 2, 2024 · String concatenation is a common technique for aggregating data from multiple records. Both char1 and char2 can be any of the datatypes CHAR, VARCHAR2, NCHAR, NVARCHAR2, CLOB, or NCLOB. 8k次，点赞5次，收藏6次。最近编码过程中出现了group by后，某些列会有多个值，而我需要把这些多个值的列进行拼接的情况，和大家分享一下。有如下表student：我们希望以class分组，每组的信息平铺，效果如下分组首先想到的肯定是group by:select *from student sgroupby s. Aug 25, 2023 · Concatenation combines string data values where each value is joined together in one string value. Enter the MySQL GROUP_CONCAT function! Oracle String Concatenation Oracle String concatenation allows you to append one string to the end of another string. See full list on oracle-base. 5. . If you do have to concatenate then just put the concatenate command in the GROUP BY. LISTAGG was introduced in Oracle 11G R2, before which one would use the circuitous MAX (SYS_CONNECT_BY_PATH) or STRAGG methods for the same result. Mar 3, 2009 · How can i put the name of the column i concatenated in group by command? Example is: tbl_staff user_id name profile last_name 1 una 0001 astfirst 2 pangalawa 0001 lastsecond 3 pangatlo 0001 last See also Concatenation Operator for information on the CONCAT operator Appendix C in Oracle Database Globalization Support Guide for the collation derivation rules, which define the collation assigned to the character return value of CONCAT Aug 5, 2011 · 2 You don't need to concatenate them, just list all three columns in the GROUP BY statement. 0. You need to convert non-string data values to string values before concatenation. How come Oracle don't suppoer many-argument-version Concat? However, thanks to Shankar, there's a || operator. MV_BI_GL_BALANCES_V2 BUI Sep 22, 2022 · Oracle SQL query CONCAT, GROUP BY Asked 3 years, 2 months ago Modified 3 years, 2 months ago Viewed 446 times SQL Reference GROUP BY Clause Specify the GROUP BY clause if you want the database to group the selected rows based on the value of expressions for each row and return a single row of summary information for each group. Pseudecode: SELECT AppPKey, concat (id || ' '), count (*) from PrmSegDO group by AppPKey So the Id´s should concat to one st Sep 28, 2017 · Concatenate few column values from multiple rows and bring the non aggregated column (pick anyone) va The GROUP BY statement groups rows that have the same values into summary rows, like "find the number of customers in each country". In concatenations of two different datatypes, Oracle Database Feb 26, 2024 · In this post you learn how to use group by to concatenate text values. MySQL and MariaDB are two that have such a function. 2) or LISTAGG (starting Oracle 11. May 6, 2009 · For appeals, questions and feedback about Oracle Forums, please email oracle-forums-moderators_us@oracle.