SQL Server教程 - T-SQL-内置函数(Built-in Functions) 更新记录 转载请注明出处: 2022年8月1日 发布。 2022年7月2日 从笔记迁移到博客。 内置函数说明(FUNCTION) Sever 提供了众多功能强大、方便易用的函数。使用这些函数,可以极大地提高数据库的管理。SQL Server中的函数从功能方面主要分为以下几类:字符串函...
While U-SQL is using C# as its expression language and thus has a large set of the Common Language Runtime (CLR) libraries and all of C#’s operators at the user’s disposal, it also adds a couple of common Built-in U-SQL Functions....
Oracle/PLSQL Built-In Functions 今天发现的一个很不错的网站,对常见函数有个很好的讲解,本来还想自己整理一下,学了这么长时间都没有系统的整理过,看了这个确实不错,值得一看。有不少例子,虽然有些确实很简单,没有必要举例,但是也足以见证笔者的耐心和负责。在此我把这里粘贴过来,不过都是引用的该网站的链接。
This article presents links to and descriptions of built-in operators and functions for strings and binary types, numeric scalars, aggregations, windows, arrays, maps, dates and timestamps, casting, CSV data, JSON data, XPath manipulation, and other miscellaneous functions....
SQL Server built-in functions are either deterministic or nondeterministic. Functions are deterministic when they always return the same result any time they are called by using a specific set of input values. Functions are nondeterministic when they could return different results every time they are...
Currently U-SQL scalar functions fit into three categories: user-defined functions written in C#, general C# functions from system provided assemblies, and built-in U-SQL functions.U-SQL table-valued functions return tables and are written in U-SQL....
The built-in support for JSON includes the following built-in functions described briefly in this article. ISJSONtests whether a string contains valid JSON. JSON_VALUEextracts a scalar value from a JSON string. JSON_QUERYextracts an object or an array from a JSON string. ...
Learn how to use functions in Transact-SQL, and how to group aggregated results.Learning objectives After completing this module, you will be able to: Categorize built-in functions Use scalar functions Use ranking and rowset functions Use aggregate functions Summarize data with GROUP BY Filter ...
All of the string built-in functions are deterministic, except forFORMAT. For a list of these functions, seeString Functions (Transact-SQL). The following built-in functions from categories of built-in functions other than string functions are always deterministic. ...
PL/SQL’s built-in numeric functions Name Description ABS Returns the absolute value of a number. ACOS Returns the inverse cosine. ASIN Returns the inverse sine. ATAN Returns the inverse tangent. ATAN2 Returns the inverse tangent of a value, but allows you to pass that value ...