一般情况下,不鼓励在SQL中使用字面值,而是主张使用变量或参数,因为字面值会使每个语句具有独特性,这会降低缓存的命中率。
Use of literals instead of variables or parameters is generally discouraged within SQL because it makes each statement unique, which drives down cache hit ratios.
购买一份真实收益率为2%的10年期债券,当面值为1000美元时,债券最初付息是20美元。
Take a bond with a 2% real yield maturing in ten years’ time; the bond will pay an initial $20 on a face value of $1, 000.
如果债券的名义收益率7%或优惠券,在103元(1030美元)的溢价购买,那么您油尖旺将计算出较低的,因为只有7%的利息支付给1000美元的面值。
If a bond has a 7% nominal yield or coupon and was purchased at a premium of $103 ($1030), then your YTM will calculate lower because the 7% interest is only paid to the $1000 par.
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