SQL number-阿里云

MaxCompute SQL中的LIMIT NUMBER限制输出行数是什么？

利用SQL查找表中的质数(prime number)和完全数(perfect number)以及几个有趣的SQL语句

之前在某次interview中被老外问到如何用SQL找出列上的质数和完全数的问题；我当时已经多年没有写过这种考算法和SQL技巧(纯粹的技巧)的语句了，乍遇此问题倒是有些棘手。现在录以记之，供人参考. ? 1 2 3 4 5 SQL> create table nu...

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SQL Server 2005与Oracle同步注意NUMBER类型转换

在前面的文章中我已经讲到使用同义词的方法来在SQL Server 2005下连接Oracle，我们可以使用同义词来实时访问Oracle数据库，但是如果Oracle中的表数据流较大则会影响应用系统的性能，于是我采用数据库作业每天定时执行： drop table abc-...

SQL, PL/SQL 之NUMBER数据类型

NUMBER数据类型在Oracle中使用的较为广泛，可以存储零值，正负数，以及定长数，对于这个数据类型有个几个概念要搞清，否则容易搞混，下面给出具体描述。 1、可表示范围及存储空间从1.0 x 10-...

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更新时间 2023-01-14 02:09:50

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