9＊9乘法口決pl/sql的多種方法實現(一句sql實現)

select r1 || '*' || r1 || '=' || r1 * r1 A,
decode(r2, '', '', r2 || '*' || r1 || '=' || r2 * r1) b,
decode(r3, '', '', r3 || '*' || r1 || '=' || r3 * r1) C,
decode(r4, '', '', r4 || '*' || r1 || '=' || r4 * r1) D,
decode(r5, '', '', r5 || '*' || r1 || '=' || r5 * r1) E,
decode(r6, '', '', r6 || '*' || r1 || '=' || r6 * r1) F,
decode(r7, '', '', r7 || '*' || r1 || '=' || r7 * r1) G,
decode(r8, '', '', r8 || '*' || r1 || '=' || r8 * r1) H,
decode(r9, '', '', r9 || '*' || r1 || '=' || r9 * r1) I
from (select level r1,
lag(level, 1) over(order by level) r2,
lag(level, 2) over(order by level) r3,
lag(level, 3) over(order by level) r4,
lag(level, 4) over(order by level) r5,
lag(level, 5) over(order by level) r6,
lag(level, 6) over(order by level) r7,
lag(level, 7) over(order by level) r8,
lag(level, 8) over(order by level) r9
from dual
connect by level < 10)

　

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