如果要截取的字段在字符串中的位置不固定,并且需要截取多个字段,可以使用SUBSTRING函数配合SUBSTRING_INDEX函数(需自定义函数)来实现。下面是一个示例: CREATEFUNCTIONCUSTOM_SUBSTRING_INDEX(inputVARCHAR(255),delimiterVARCHAR(12),indexINT)RETURNSVARCHAR(255)DETERMINISTICBEGINRETURNSUBSTRING_INDEX(SUBSTRING_INDEX(input,d...
❮Previous❮ SQL Server FunctionsNext❯ ExampleGet your own SQL Server Extract 3 characters from a string, starting in position 1: SELECTSUBSTRING('SQL Tutorial',1,3)ASExtractString; Try it Yourself » Definition and Usage The SUBSTRING() function extracts some characters from a string. ...
MYSQL中有系统函数 SUBSTRING_INDEX(), 方便地实现了“一行数据拆分成多行”, SQL SERVER使用都可没这么好了。因此,我在SQL SERVER 2008中仿写了一个自定义函数 f_substring_index() 。 详细代码如下: /* Returns the substring from string str before count occurrences of the delimiter delim. If count is ...
我们可以通过PATINDEX函数找到第一个数字字符的位置,然后使用SUBSTRING函数截取字符串的一部分,得到只包含数字字符的子字符串。此外,我们还可以通过创建自定义函数来封装提取数字的逻辑,使代码更加可维护和可重用。 希望本文对你在SQL Server中提取数字字符有所帮助! 参考资料: [SQL Server PATINDEX() Function]( [SQL...
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...
PATINDEXReturns the position of a pattern in a string QUOTENAMEReturns a Unicode string with delimiters added to make the string a valid SQL Server delimited identifier REPLACEReplaces all occurrences of a substring within a string, with a new substring ...
VALUES (LEFT(@Str, @Index - 1)) SET @Str = SUBSTRING(@Str, @Index + 1, LEN(@Str)) SET @Index = CHARINDEX(@Separator, @Str) END INSERT INTO @Result (Value) VALUES (@Str) RETURN END 使用示例: SELECT * FROM dbo.fn_SplitString('Hello,World,Sql Server', ',') -- 返回分割后的...
SELECT SUBSTRING_INDEX(location, ',', 1) FROM my_contacts; Thanks in Advance All replies (2) Thursday, January 23, 2014 5:08 PM ✅Answered |2 votes There is no equivalent function in SQL Server. We need to write our own function. ...
function is used to extract a part of a string. This function is available in both MS SQL Server and MySQL. The MySQL SUBSTRING function provides more functionality than MS SQL Server SUBSTRING function. In MySQL you can also use SUBSTR function which is Synonym for SUBSTRING function ...
This is the query as per the example in the bookSELECT SUBSTRING_INDEX(location, ',', 1) FROM my_contacts;Thanks in Advance All replies (2)Thursday, January 23, 2014 5:08 PM ✅Answered | 2 votesThere is no equivalent function in SQL Server. We need to write our own function. ...