比如现在有一字符串:1,2,44,5,666,29232 要把它按照逗号分割成: 1 2 44 5 666 29232 而且还要求它的总数。这个我以前写过。不过今天规范一下。 1、具体函数 SQL code -
DELIMITER $$ CREATE DEFINER = `root`@` % ` FUNCTION `func_get_split_string_total`( f_string varchar ( 1000 ),f_delimiter varchar ( 5 ) ) RETURNS int ( 11 ) BEGIN -
-- Get the total number of given string. return 1 + (length(f_string) - length( replace (f_string,f_delimiter, '' ))); END $$ DELIMITER ;
SQL code -
DELIMITER $$ CREATE DEFINER = `root`@` % ` FUNCTION `func_get_split_string`( f_string varchar ( 1000 ),f_delimiter varchar ( 5 ),f_order int ) RETURNS varchar ( 255 ) CHARSET utf8 BEGIN -
-- Get the separated number of given string. declare result varchar ( 255 ) default '' ; set result = reverse (substring_index( reverse (substring_index(f_string,f_delimiter,f_order)),f_delimiter, 1 )); return result; END $$ DELIMITER ; 测试的存储过程: -
DELIMITER $$CREATE PROCEDURE `sp_print_result`( IN f_string varchar(1000),IN f_delimiter varchar(5)) BEGIN -- Get the separated string. declare cnt int default 0; declare i int default 0; set cnt = func_get_split_string_total(f_string,f_delimiter); drop table if exists tmp_print; create temporary table tmp_print (num int not null); while i < cnt do set i = i + 1; insert into tmp_print(num) values (func_get_split_string(f_string,f_delimiter,i)); end while; select * from tmp_print; END$$ DELIMITER ;
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2、来做一下测试 mysql> call sp_print_result('1,2,44,5,666,29232',','); +-------+ | num | +-------+ | 1 | | 2 | | 44 | | 5 | | 666 | | 29232 | +-------+ 6 rows in set (0.01 sec) Query OK, 0 rows affected (0.01 sec)
本文转自 yarin 51CTO博客,原文链接:http://blog.51cto.com/yueliangdao0608/82320,如需转载请自行联系原作者