一、原题 Which two statements are true regarding the ORDER BY clause? (Choose two.) A. It is executed first in the query execution. B. It must be the last clause in the SELECT statement. C. It cannot be used in a SELECT statement containing a HAVING clau…
由于打印invoice和packing list等时需要将数量和金额转换成英文大写,所以写了段代码进行转换。利用此段代码可以将所有数字类型的值转换成英文大写。源代码如下: if total_amount ne 0. perform get_num_len using total_amount changing integer …
数组和字符串
1、数组转字符串 需要将数组元素用某个字符连接成字符串,示例代码如下:
var a, b;
a new Array(0,1,2,3,4);
b a.join("-"); //"0-1-2-3-4"
2、字符串转数组
实现方法为将字符串按某个字符切割成若干个字符…
按照时间,每天分区 create table test_p(id number,createtime date) partition by range(createtime) interval(numtodsinterval(1,day)) store in (users) ( partition test_p_p1 values less than(to_date(20140110,yyyymmdd)) ); create index index_test_p_id …
概念解析
阿姆斯特朗数。
如果一个n位正整数等于其各位数字的n次方之和,则称该数为阿姆斯特朗数。 例如1^3 5^3 3^3 153 以下代码用于实现输出 1 到 100000 之间的阿姆斯特朗数:
for i in range(1,100000):g i % 10s i // 10 % 10b i // 100 % 10q i // 1…
一、原题 View the Exhibit and examine the data in the PROMO_CATEGORY and PROMO_COST columns of the PROMOTIONS table. Evaluate the following two queries: SQL>SELECT DISTINCT promo_category to_char(promo_cost)"code" FROM prom…