I am using oracle 10g. I have a temp table TEMP.
TEMP has following structure:-
USER COUNT TYPE ---- ----- ---- 1 10 T1 2 21 T2 3 45 T1 1 7 T1 2 1 T3 I need a query which will show all types has column names,and types can have any value like T1, T2,..Tn and result will be like:-
USER T1 T2 T3 ---- -- -- -- 1 17 0 1 2 0 21 1 3 45 0 0 and User column will show all the users and T1, T2 column will show total count of types.
In Oracle 10g, there was no PIVOT function but you can replicate it using an aggregate with a CASE:
select usr, sum(case when tp ='T1' then cnt else 0 end) T1, sum(case when tp ='T2' then cnt else 0 end) T2, sum(case when tp ='T3' then cnt else 0 end) T3 from temp group by usr; If you have Oracle 11g+ then you can use the PIVOT function:
select * from temp pivot ( sum(cnt) for tp in ('T1', 'T2', 'T3') ) piv If you have an unknown number of values to transform, then you can create a procedure to generate a dynamic version of this:
CREATE OR REPLACE procedure dynamic_pivot(p_cursor in out sys_refcursor) as sql_query varchar2(1000) := 'select usr '; begin for x in (select distinct tp from temp order by 1) loop sql_query := sql_query || ' , sum(case when tp = '''||x.tp||''' then cnt else 0 end) as '||x.tp; dbms_output.put_line(sql_query); end loop; sql_query := sql_query || ' from temp group by usr'; open p_cursor for sql_query; end; / then to execute the code:
variable x refcursor exec dynamic_pivot(:x) print x The result for all versions is the same:
| USR | T1 | T2 | T3 | ---------------------- | 1 | 17 | 0 | 0 | | 2 | 0 | 21 | 1 | | 3 | 45 | 0 | 0 | Edit: Based on your comment if you want a Total field, the easiest way is to place the query inside of another SELECT similar to this:
select usr, T1 + T2 + T3 as Total, T1, T2, T3 from ( select usr, sum(case when tp ='T1' then cnt else 0 end) T1, sum(case when tp ='T2' then cnt else 0 end) T2, sum(case when tp ='T3' then cnt else 0 end) T3 from temp group by usr ) src; Here is a code for table creation:
CREATE TABLE TBL_TEMP ( USR NUMBER ,CNT NUMBER ,TP VARCHAR2 (10) ); INSERT INTO TBL_TEMP VALUES (1,10,'T1'); INSERT INTO TBL_TEMP VALUES (2,21,'T2'); INSERT INTO TBL_TEMP VALUES (3,45,'T1'); INSERT INTO TBL_TEMP VALUES (1,7,'T1'); INSERT INTO TBL_TEMP VALUES (2,1,'T3'); And, here is a code for your request:
SELECT T1.USR ,SUM (T1) T1 ,SUM (T2) T2 ,SUM (T3) T3 FROM (SELECT DISTINCT USR FROM TBL_TEMP) T1 ,(SELECT T2.USR ,DECODE (T2.TP, 'T1', T2.CNT, 0) T1 ,DECODE (T2.TP, 'T2', T2.CNT, 0) T2 ,DECODE (T2.TP, 'T3', T2.CNT, 0) T3 FROM TBL_TEMP T2) T2 WHERE T1.USR = T2.USR GROUP BY T1.USR; And, the result is what you wanted.
Check it at SQL Fiddle Link here
Please check the query:
SET SERVEROUTPUT ON; DECLARE CURSOR V_CUR IS SELECT DISTINCT "TYPE" FROM temp_tbl; V_QUERY CLOB; V_COLUMNHEADING CLOB; V_ROW V_CUR%ROWTYPE; BEGIN OPEN V_CUR; LOOP FETCH V_CUR INTO V_ROW; EXIT WHEN V_CUR%NOTFOUND; V_COLUMNHEADING:=CONCAT(V_COLUMNHEADING,''''||V_ROW."TYPE"||''' AS "'||V_ROW."TYPE"||'",'); END LOOP; IF NVL(V_COLUMNHEADING,' ') ' ' THEN V_COLUMNHEADING := SUBSTR(V_COLUMNHEADING,0,LENGTH(V_COLUMNHEADING)-1); END IF; V_QUERY := CONCAT(V_QUERY,'select * from (select * from temp_tbl)a pivot (sum("COUNT")for "TYPE" in ('||V_COLUMNHEADING||'))b;'); DBMS_OUTPUT.PUT_LINE(V_QUERY); END ; To select data, use statement OPEN CUR_TURN_TIME FOR V_QUERY; in place of DBMS_OUTPUT.PUT_LINE(V_QUERY);, where CUR_TURN_TIME is the cursor declared in the package.