执行以上SQL语句后,会返回结果"example",表示截取字符串"***"中从第1个字符开始,到第一个"@"字符之前的部分。 总结来说,CHARINDEX函数在SQL Server中用于查找一个字符串在另一个字符串中第一次出现的位置。它的用法较为简单,但在处理复杂的字符串操作时,结合其他函数的使用可以达到更强大的功能。对于字符串查找...
SELECTEmailAddress,SUBSTRING(EmailAddress,CHARINDEX('@',EmailAddress)+1,LEN(EmailAddress))ASDomainFROMUsers; 该查询返回电子邮件地址中的域名部分,如'example.com'。 4.3 查找和替换 虽然SQL Server 中的REPLACE函数通常用于替换字符串中的子字符串,但CHARINDEX可以用于查找目标字符串中的具体位置,从而实现更复杂的...
SELECTEmailAddress,SUBSTRING(EmailAddress, CHARINDEX('@', EmailAddress)+1, LEN(EmailAddress))ASDomainFROMUsers; 该查询返回电子邮件地址中的域名部分,如'example.com'。 4.3 查找和替换 虽然SQL Server 中的REPLACE函数通常用于替换字符串中的子字符串,但CHARINDEX可以用于查找目标字符串中的具体位置,从而实现更...
This example returns the first location of the string is in string This is a string, starting from position 1 (the first character) of This is a string.SQL Afrita SELECT CHARINDEX('is', 'This is a string'); Here is the result set....
SELECT SUBSTRING(content, LOCATE('example', content)) AS extracted_text FROM posts; -- 或者 SELECT SUBSTRING(content, INSTR(content, 'example')) AS extracted_text FROM posts; 复制代码总之,虽然 CHARINDEX 是SQL Server 中的一个函数,但在 MySQL 中,你可以使用 LOCATE 或INSTR 函数实现类似的功能。这...
Example Search for "mer" in string "Customer", and return position (start in position 3): SELECT CHARINDEX('mer', 'Customer', 3) AS MatchPosition; Try it Yourself » ❮ Previous ❮ SQL Server Functions Next ❯ Track your progress - it's free! Log in Sign Up ...
This example returns the first location of the stringisin stringThis is a string, starting from position 1 (the first character) ofThis is a string. SQL SELECTCHARINDEX('is','This is a string'); Here's the result set. --- 3 G. Searching...
This example returns the first location of the string is in string This is a string, starting from position 1 (the first character) of This is a string.SQL Copiere SELECT CHARINDEX('is', 'This is a string'); Here is the result set....
This example returns the first location of the string is in string This is a string, starting from position 1 (the first character) of This is a string.SQL Copy SELECT CHARINDEX('is', 'This is a string'); Here's the result set....
This example returns the first location of the string is in string This is a string, starting from position 1 (the first character) of This is a string.SQL Copy SELECT CHARINDEX('is', 'This is a string'); Here's the result set....