在 MySQL 8 中使用 sProc 拆分由分号分隔的字符串值

Question

我需要在 MySQL 8 版本

中使用 stored Procedure 拆分此字符串

"John;Elizabeth;Mark;Zagor;Annie;Lucy;Peter;Robin;Wilson;Tom;Bettie;Myriam;Frankie;Nick;Marilyn"

字符串值用分号分隔。

下面是我的sProc。

问题出在输出上。

在此字符串上拆分的名字是 Elizabeth 而不是 John。

它在哪里 John?

所有其他名称都出现在 sProc 的输出中，只有 John 缺失...

我做错了什么？

BEGIN

DECLARE tNameSeries LONGTEXT;
DECLARE t_tNameSeries LONGTEXT;

SET tNameSeries = "John;Elizabeth;Mark;Zagor;Annie;Lucy;Peter;Robin;Wilson;Tom;Bettie;Myriam;Frankie;Nick;Marilyn";

WHILE LOCATE(";",tNameSeries) > 0 DO

SET tNameSeries = REPLACE (tNameSeries, (SELECT LEFT(tNameSeries,LOCATE(";",tNameSeries))),'');

SET t_tNameSeries = SUBSTRING_INDEX(tNameSeries,";",1);

SELECT t_tNameSeries;

END WHILE;

END

更新

使用这个编辑 sProc 输出只有 John

BEGIN

DECLARE tNameSeries LONGTEXT;
DECLARE t_tNameSeries LONGTEXT;

SET tNameSeries = "John;Elizabeth;Mark;Zagor;Annie;Lucy;Peter;Robin;Wilson;Tom;Bettie;Myriam;Frankie;Nick;Marilyn";

WHILE LOCATE(";",tNameSeries) > 0 DO

SET t_tNameSeries = SUBSTRING_INDEX(tNameSeries,";",1);

SET tNameSeries = REPLACE (t_tNameSeries, (SELECT LEFT(t_tNameSeries,LOCATE(";",t_tNameSeries))),'');

SELECT tNameSeries;

END WHILE;

END

Answer 1

SELECT *
FROM JSON_TABLE(
    CONCAT(
        '["',
        REPLACE(
            "John;Elizabeth;Mark;Zagor;Annie;Lucy;Peter;Robin;Wilson;Tom;Bettie;Myriam;Frankie;Nick;Marilyn",
            ';',
            '","'
            ),
        '"]'
        ),
    '$[*]' COLUMNS (
        id FOR ORDINALITY,
        name VARCHAR(255) PATH '$'
        )
    ) jsontable;

https://dbfiddle.uk/?rdbms=mysql_8.0&fiddle=546907fc5c00b7173fa73327fdd97638

如果需要，将其插入 SP。

Answer 2

这也有效：


set @names = 'John;Elizabeth;Mark;Zagor;Annie;Lucy;Peter;Robin;Wilson;Tom;Bettie;Myriam;Frankie;Nick;Marilyn';

select 
   substring_index(substring_index(@names,';',R),';',-1) W 
from (select row_number() over () as R 
      from information_schema.tables) x 
where x.R<=1+length(@names)-length(replace(@names,';',''));

参见：https://dbfiddle.uk/?rdbms=mysql_8.0&fiddle=5cc442be9da54d8cbcdbabc58ee37b65

在 MySQL 8 中使用 sProc 拆分由分号分隔的字符串值

Split string values separated by a semicolon using sProc in MySQL 8

mysql

string

split

stored-procedures