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오라클 DUAL을 사용하여 멀티 row, column table 만들기

쿼리

select
   decode(rownum, 1, 'A', 2, 'B', 3, 'C') as col1,
   decode(rownum, 1, 'D', 2, 'E', 3, 'F') as col2
from
   dual
connect by level <= 3;

 

결과

 

[출처] stackOverFlow https://stackoverflow.com/questions/28202851/oracle-select-from-dual-with-multiple-rows-and-columns?rq=1

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