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  • mysql 按指定字符拆分字符串

    SQL语句:

    SET @str = '7654,7698,7782,7788';
    SELECT SUBSTRING_INDEX(SUBSTRING_INDEX(@str, ',', help_topic_id + 1), ',', - 1) AS num
    FROM mysql.help_topic
    WHERE help_topic_id < LENGTH(@str) - LENGTH(REPLACE (@str, ',', '')) + 1

    封装成存储过程:

    /*
     * 名称:按指定字符拆分字符串
     * 输入参数,str,需拆分的字符串
     * 输入参数,splitChar,用于分隔的字符
     */
    DROP PROCEDURE IF EXISTS proc_common_split;
    CREATE PROCEDURE proc_common_split 
    (
        -- 需拆分的字符串
        str LONGTEXT,
        -- 用于分隔的字符
        splitChar CHAR(1)
    )
    BEGIN
        SELECT SUBSTRING_INDEX(SUBSTRING_INDEX(str, splitChar, help_topic_id + 1), splitChar, - 1) AS Result
        FROM mysql.help_topic
        WHERE help_topic_id < LENGTH(str) - LENGTH(REPLACE (str, splitChar, '')) + 1;
    END;
    
    /*
    
        输入参数,str,需拆分的字符串
        输入参数,splitChar,用于分隔的字符
     
        CALL proc_common_split('1,2,3', ',');
    
    */
     
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  • 原文地址:https://www.cnblogs.com/jardeng/p/14004701.html
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