通过sql实现动态行转列

实现代码：
create or replace procedure p_test is
v_sql varchar2(2000);

cursor cursor_1 is
select distinct subject from tmp_test order by subject;

begin
v_sql := ‘select username‘;
for v_subject in cursor_1 loop
v_sql := v_sql || ‘,‘ ||‘sum(decode(subject,‘‘‘ ||v_subject.subject ||‘‘‘,source)) as ‘ ||v_subject.subject;
dbms_output.put_line(v_sql);
end loop;

v_sql := vql || ‘ from tmp_test group by username‘;
dbms_output.put_line(v_sql);

v_sql := ‘create or replace view test_result as ‘ || v_sql;

execute immediate v_sql;

end;
存储过程已经写好了，开始调用存过：
begin
p_test;
end;

查询视图test_result：
代码实现：
select * from test_result;
数据如下：

到这一步，动态行转列就已经实现了！希望对小伙伴有帮助！

通过sql实现动态行转列

原文：https://blog.51cto.com/12777507/2404745