在这一步骤中,我们需要使用MySQL内置的函数来实现字符串的分割。 -- 创建一个存储过程来实现字符串分割DELIMITER$$CREATEPROCEDUREsplitString(strVARCHAR(255))BEGINDECLAREtempVARCHAR(255);DECLAREiINTDEFAULT1;DECLAREresultVARCHAR(255);-- 循环遍历字符串WHILEi<=LENGTH(str)DO-- 获取逗号之前的子字符串SETtemp=S...
AI检测代码解析 -- 创建存储过程DELIMITER//CREATEPROCEDUREsplit_string_by_punctuation()BEGINDECLAREiINTDEFAULT0;DECLAREstrVARCHAR(255);-- 获取需要处理的字符串SELECTcontentINTOstrFROMtest_tableWHEREid=1;WHILEi<LENGTH(str)DOIFSUBSTRING(str,i,1)REGEXP'[[:punct:]]'THENSETstr=INSERT(str,i,0,',');...
1.通过某个字符,分割字符串的函数。输入分别为f_string(待分割字符串),f_delimiter(分割字符),f_order(取的字符串的index) DELIMITER $$ USE `money`$$ DROP FUNCTION IF EXISTS `F_SPLIT_STRING`$$ CREATE DEFINER=`root`@`%` FUNCTION `F_SPLIT_STRING`( f_string VARCHAR(1000),f_delimiter VARCHAR(...
DROP function IF EXISTS `func_split_TotalLength` $$ CREATE DEFINER=`root`@`localhost` FUNCTION `func_split_TotalLength` (f_string varchar(1000),f_delimiter varchar(5)) RETURNSint(11) BEGIN # 计算传入字符串的总lengthreturn1+(length(f_string) - length(replace(f_string,f_delimiter,'')));...
CREATE FUNCTION SPLIT_STR( x VARCHAR(255), delim VARCHAR(12), pos INT ) RETURNS VARCHAR(255) RETURN REPLACE(SUBSTRING(SUBSTRING_INDEX(x, delim, pos), LENGTH(SUBSTRING_INDEX(x, delim, pos -1)) + 1), delim, ''); Usage SELECT SPLIT_STR(string, delimiter, position) ...
查找、分割(split) 字符串 ELT() FIND_IN_SET() INSTR() LOCATE() 和 POSITION() REGEXP_INSTR() REGEXP_SUBSTR() SUBSTR() 和 SUBSTRING() SUBSTRING_INDEX() LEFT() RIGHT() 示例1 给定一个字符串表示:出版社 + 作者 + 书名 ;如:'电子工业出版社#孙卫琴#Tomcat与Java'根据分隔符# 拆分字符串 ...
CREATE FUNCTION SPLIT_STR( x VARCHAR(255), delim VARCHAR(12), pos INT ) RETURNS VARCHAR(255) RETURN REPLACE(SUBSTRING(SUBSTRING_INDEX(x, delim, pos), LENGTH(SUBSTRING_INDEX(x, delim, pos -1)) + 1), delim, ''); Usage SELECT SPLIT_STR(string, delimiter, position) ...
-- 创建拆分后的表 CREATE TABLE user_shard_0 ( id BIGINT PRIMARY KEY, name VARCHAR(255), email VARCHAR(255) ); CREATE TABLE user_shard_1 ( id BIGINT PRIMARY KEY, name VARCHAR(255), email VARCHAR(255) ); -- 插入数据时根据ID进行哈希拆分 DELIMITER // CREATE PROCEDURE insert_user(IN ...
自定义SPLIT_STR函数 DELIMITER $$ CREATE FUNCTION SPLIT_STR(x VARCHAR(255), delim VARCHAR(12), pos INT) RETURNS VARCHAR(255) DETERMINISTIC BEGIN RETURN REPLACE(SUBSTRING(SUBSTRING_INDEX(x, delim, pos), LENGTH(SUBSTRING_INDEX(x, delim, pos - 1)) + 1), delim, ''); END$$ DELIMITER ; ...
Split String Posted by:Mike Sheldon Date: March 27, 2006 10:10AM Our MS SQL database extensively uses a T-SQL user defined function that splits a delimited string and returns a table of the split strings. We use this like select * from table1 where MainID in (select token from split...