回答編集履歴
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追記
test
CHANGED
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@@ -7,3 +7,35 @@
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, (select count(*) as count2 from hugeMst) b ;
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```
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追記
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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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```SQL
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SQL> column counts format 999,990
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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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6 ) ;
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COUNTS
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--------
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53,015
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```
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Oracle18C
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