11:20:29 SQL> select ceil(1.1) from dual; CEIL(1.1)
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2已用时间: 00: 00: 00.29
11:34:17 SQL> select ceil(1.7) from dual; CEIL(1.7)
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2已用时间: 00: 00: 00.15
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2已用时间: 00: 00: 00.29
11:34:17 SQL> select ceil(1.7) from dual; CEIL(1.7)
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2已用时间: 00: 00: 00.15
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2已用时间: 00: 00: 00.46
11:30:34 SQL>