默认看到查询条件有3条结果，我想只查询出日期最晚的那一条记录。
-- 默认查询条件select settledate as "日期", syscalculationmny as "金额" from cdmc_interestlist where pk_financepay in (select pk_financepay from cdmc_financepay where vbillno = 'SFLXQD0036_001') order by settledate desc
把查询条件括起来，加个rownum=1的筛选条件就能筛选出1行数据。
-- 筛选符合条件的第一条select * from (select settledate as "日期", syscalculationmny as "金额" from cdmc_interestlist where pk_financepay in (select pk_financepay from cdmc_financepay where vbillno = 'SFLXQD0036_001') order by settledate desc ) where rownum=1
两条数据的话要用小于号，等于号我试过了，查询出的结果为空。
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Oracle 数据库 - sql语句筛选出符合查询条件的第一条结果实例演示 sql查询结果只显示指定行数的数据方法
