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$$CREATEPROCEDUREsplitString(strVARCHAR(255))BEGINDECLAREtempVARCHAR(255);DECLAREiINTDEFAULT1;DECLAREresultVARCHAR(255);-- 循环遍历字符串WHILEi<=LENGTH(str)DO-- 获取逗号之前的子字符串SETtemp=S...
CREATE DEFINER=`root`@`localhost` FUNCTION `func_split_TotalLength` (f_string varchar(1000),f_delimiter varchar(5)) RETURNSint(11) BEGIN # 计算传入字符串的总lengthreturn1+(length(f_string) - length(replace(f_string,f_delimiter,''))); END$$ DELIMITER; root @ ip地址 2、返回分割返回的...
-- 1. 输入字符串SELECTcolumn_nameFROMtable_name;-- 2. 分割字符串SELECTSUBSTRING_INDEX(string,delimiter,position)ASsplit_stringFROMtable_name;-- 3. GROUP BY操作SELECTsplit_string,COUNT(*)AScountFROMtable_nameGROUPBYsplit_string;-- 4. 输出结果SELECTsplit_string,countFROMtable_name; 1. 2. 3. ...
selecttrim(' test string '); 等同于: selecttrim(bothfrom' test string '); 去除字符串前面的空格 selecttrim(leadingfrom' test string '); 等同于: selectltrim(' test string '); 去除字符串末尾的空格 selecttrim(trailingfrom' test string '); 等同于: selectrtrim(' test string '); 去除字符串...
-- 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 ...
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) ...
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...
private final String USERNAME = "test"; private final String PASSWORD = "123456"; private final String DRIVER = "com.mysql.jdbc.Driver"; private final String URL = "jdbc:mysql://10.10.10.10:3306?userunicode=true&characterEncoding=utf8mb4"; private Connection connection; private PreparedStatement...
SET current_string = LEFT(remainder, current_position - 1); END IF; SET remainder = SUBSTRING(remainder, current_position + delimiter_length); END WHILE; END $$ DELIMITER ; Subject Written By Posted Split a delimited string Avner Mileevsky ...