listagg

问题 Oracle 12c database. I have a car sales table: CREATE TABLE CAR_SALES ( NUM_CARS NUMBER(10,0), EQUIPMENT_TYPE VARCHAR2(100), LOCATION VARCHAR2(500), SOLD_DATE DATE ) ; --Insert sample data insert into car_sales (num_cars,equipment_type,location,sold_date) values ('8','Rovers','coventry','07-SEP-19 10:00:12'); insert into car_sales (num_cars,equipment_type,location,sold_date) values ('1','Rovers','coventry','07-SEP-19 10:00:45'); insert into car_sales (num_cars,equipment_type,location,sold

问题 I am trying to use LISTAGG() to fetch more than two columns. SELECT deptname, deptno, LISTAGG(ename, ',') WITHIN GROUP (ORDER BY ename) AS employees FROM emp GROUP BY deptno; But it is throwing this error: : FROM keyword not found where expected 00000 - "FROM keyword not found where expected" *Cause: *Action: Error at Line: 3 Column: 12 Can please somebody explain why it is? 回答1: The LISTAGG analytic function was introduced in Oracle 11g Release 2 . So, if you are on older version, you won't

问题 I am trying to concat/merge rows in a table to one single row. I tried using listagg but due to varchar limitation this doesn't work. create table tmp(word VARCHAR2(4000), lvl NUMBER); insert into tmp2 values('python',1); insert into tmp2 values('java',2); select listagg(word,' ') within group(order by lvl) as listagg_output from tmp; The output should look like python java. 回答1: What will you do with such a long string? Anyway, have a look at this example; if listagg won't work, xmlagg will.

来源： https://stackoverflow.com/questions/58560479/retrieve-distinct-values-with-listagg-in-oracle-12c

来源： https://stackoverflow.com/questions/58560479/retrieve-distinct-values-with-listagg-in-oracle-12c

来源： https://stackoverflow.com/questions/64256770/invalid-character-error-while-executing-oracle-procedure-using-getclobval

问题 This question already has an answer here : Not able to use LISTAGG (1 answer) Closed 2 years ago . SELECT deptno, LISTAGG(ename, ',') WITHIN GROUP (ORDER BY ename) AS employees FROM emp GROUP BY deptno; Error:- ORA-00923: FROM keyword not found where expected 00923. 00000 - "FROM keyword not found where expected" *Cause: *Action: Error at Line: 1 Column: 42 Oracle Database 11g Enterprise Edition Release 11.1.0.7.0 - 64bit Production 回答1: For the 10gR2 or 11gR1 versions of Oracle , you can use

问题 I have the following data Base End RMSA Item 1 RMSA Item 2 RMSA Item 3 RMSB Item 1 RMSB Item 2 RMSC Item 4 I want to convert it to the following format Key Products RMSA;RMSB Item 1, Item 2 RMSA Item 3 RMSC Item 4 Basically, those with similar results should be grouped into 1 line. However, I can't seem to get it to work using listagg, etc since I'm grouping on two columns. Is there any way to do this with a direct Oracle query? 回答1: You can use listagg() window analytic function twice as

问题 I have the following data Base End RMSA Item 1 RMSA Item 2 RMSA Item 3 RMSB Item 1 RMSB Item 2 RMSC Item 4 I want to convert it to the following format Key Products RMSA;RMSB Item 1, Item 2 RMSA Item 3 RMSC Item 4 Basically, those with similar results should be grouped into 1 line. However, I can't seem to get it to work using listagg, etc since I'm grouping on two columns. Is there any way to do this with a direct Oracle query? 回答1: You can use listagg() window analytic function twice as

问题 I'm trying to get the COLLECT function to work for me. I'm using 10g and therefore found that LISTAGG and WM_CONCAT will not work (invalid identifier errors). The data I have is for example as follows. Order Lot 123 A23088 123 A23089 089 AABBCC 305 120848 305 CCDDYY What I need returned is as follows Order Lot 123 A23088, A23089 089 AABBCC 305 120848, CCDDYY Using the following, I get the error: TO_STRING is an invalid identifier TO_STRING ( CAST(COLLECT(DISTINCT LOT) AS varchar2(100)) ) AS