>.DISTINCT: 去重函数 --计算总销售额SELECTSUM(amount)AStotal_salesFROMsales;--使用SUM函数求sales表中amount列的总和--计算平均产品价格SELECTAVG(price)ASaverage_priceFROMproducts;--使用AVG函数求products表中price列的平均值--查找最低的产品价格SELECTMIN(price)ASmin_priceFROMproducts;--使用MIN函数找出prod...
bond market, causing the yield of U.S. Treasury rise. 10-year Treasury yield rose above 2% level. The yield of short-term debt was up slightly too, 3-month Treasury yield rose to 0.07%, but remained in low level. Hong Kong interest rates kept steady, and 3-month HIBOR remained ...
S456958 CHINA_MAP: Stata module to provide map of China’s provinces by Scott Merryman S456957 USESPSS: Stata module to import SPSS (*.sav) data (Windows only) by Sergiy Radyakin S456956 PAVERAGE: Stata module to calculate p-period-average series in a panel dataset by P. Wilner Jeanty...
The first vector to be added contains the squares of 0 up to n. The second vector contains the cubes of 0 up to n. The program prints the last 2 elements of the sum and the elapsed time. """defnumpysum(n): a = np.arange(n) **2b = np.arange(n) **3c = a + breturncdefp...
start = datetime(end.year-1,end.month,end.day) end = str(end)[0:10] start = str(start)[0:10] stock = ts.get_hist_data('300104',start,end)#选取一支股票 stock['close'].plot(legend=True ,figsize=(10,4)) plt.show() 股票日线 同理,可以做出5日均线、10日均线以及20日均线 stock[...
Last year was the warmest year on record,with global temperature 0.68℃___ the average.( )A. belowB. onC. atD. above
weight, Zion's footwork has become lighter, and his first-step acceleration rivals that of guards, posing a significant threat in the paint. This season, he averages 17.5 points in the paint per game, ranking second in the league, behind only Giannis Antetokounmpo, who averages 20.1 points....
stock returns associated with market β, size, leverage, book‐to‐market equity, and earnings‐price ratios. Moreover, when the tests allow for variation in β that is unrelated to size, the relation between market β and average return is flat, even when β is the only explanatory ...
“I wish I could live in a place like America where you have freedom,” a third-year male university student with the English name Rebecca confides in Hessler. Though Chinese people might sometimes harass foreigners, Hessler writes elsewhere in the book, most of all they are curious about ...
The condylar constrained total knee arthroplasty was performed on 29 patients undergoing 33 procedures and were reviewed clinically and radiographically at an average follow-up of 5 years (range, 2-10 years). There were 21 women and 8 men. The average age at the time of surgery was 70 years...