在oracle 11g中创建多个默认值行

Question

select 'a' as st,'x' as ed from dual
union all
select 'b' as st,'y' as ed from dual
union all
select 'c' as st,'z' as ed from dual

相反，我们可以写一些像直接使用pivot / unpivot的东西 并通过cclause在一个slect语句中连接

Answer 1

你可以做这样的事情，假设你只想要连续的行中的连续字符

SQL> ed
Wrote file afiedt.buf

  1  select chr( ascii('a') + level - 1) st,
  2         chr( ascii('x') + level - 1) ed
  3    from dual
  4* connect by level <= 3
SQL> /

ST   ED
---- ----
a    x
b    y
c    z