回答編集履歴
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追記
answer
CHANGED
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@@ -2,4 +2,20 @@
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2
2
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select a.count1 + b.count2 as counts from
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3
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(select count(*) as count1 from hogeMst) a
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, (select count(*) as count2 from hugeMst) b ;
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-
```
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5
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```
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6
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追記
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7
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count って関数名だから、別名にしない方が良いです。
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8
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```SQL
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9
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SQL> column counts format 999,990
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10
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SQL> select sum(counts) as counts
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2 from(
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3 select count(*) as counts from user_tables
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4 union all
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5 select count(*) as counts from user_objects
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15
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6 ) ;
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COUNTS
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18
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--------
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19
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53,015
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20
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```
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21
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Oracle18C
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