string-aggregation

This question already has an answer here : How can I get the unique characters from a string in Oracle? (1 answer) Closed 6 years ago . I'm quite new to PL/SQL and I need to get the names and count of the distinct characters in a string. E.g. if I have a string str="helloexample" , I need to get output of distinct characters in str , i.e. heloxamp . How can I do this? You can use regular expression as follows: SET serveroutput ON DECLARE str VARCHAR2(20):='helloexample'; str_length NUMBER; c VARCHAR2(20):=NULL; d NUMBER; BEGIN str_length:=LENGTH(str); FOR i IN 1..str_length LOOP IF regexp

This is a sample table data Fruit Number Apple 1 Apple 2 Apple 3 Kiwi 6 Kiwi 10 I try to concatenate the table column values to get the following Fruit Number Apple 1-2-3 Kiwi 6-10 Is there a way to query this or store procedure? Something like Concatenate over(partition by) , I don't know much about stored procedures. Thanks! OP is on Oracle 10g , and LISTAGG was introduced in 11g Release 2 . Therefore, in Oracle version prior to 11g where LISTAGG is not supported, you could use ROW_NUMBER() and SYS_CONNECT_BY_PATH functions. SELECT fruit, LTRIM(MAX(SYS_CONNECT_BY_PATH(number,',')) KEEP

I currently am working on a project within Crystal Reports that refuses to use the undocumented function WM_CONCAT, which is allowable within Oracle 10g. Here is the WM_CONCAT header information WM_CONCAT(p1 IN VARCHAR2) RETURN VARCHAR2 To use WM_CONCAT I pass it the following: WM_CONCAT(column1); This function seems to accept a column of type varchar2, and returns a comma delimited list of values from the column. I currently have a custom version of this function that works (on my work computer), but it is not optimal and lacks re-usability. Could anyone provide a good, re-usable function

I have the following query: WITH cteCountryLanguageMapping AS ( SELECT * FROM ( VALUES ('Spain', 'English'), ('Spain', 'Spanish'), ('Sweden', 'English'), ('Switzerland', 'English'), ('Switzerland', 'French'), ('Switzerland', 'German'), ('Switzerland', 'Italian') ) x ([Country], [Language]) ) SELECT [Country], CASE COUNT([Language]) WHEN 1 THEN MAX([Language]) WHEN 2 THEN STRING_AGG([Language], ' and ') ELSE STRING_AGG([Language], ', ') END AS [Languages], COUNT([Language]) AS [LanguageCount] FROM cteCountryLanguageMapping GROUP BY [Country] I was expecting the value inside Languages column for

Anyone knows if String Aggregation in sqlite is possible? If i have an animal column with 5 rows/datas, how can i combine them so that the output would be in one field 'dog','cat','rat','mice','mouse' as animals Thanks You're looking for something like the following: select group_concat(animal) from animals; This will return something like the following: dog,cat,rat,mice,mouse If you don't want to use a comma as the separator, you can add your own separator as a second parameter: select group_concat(animal, '_') from animals; which will return: dog_cat_rat_mice_mouse I think this will be