mysql陣列分割成多列
CREATE TABLE sub_array (
testName VARCHAR(30) DEFAULT NULL
) ENGINE=INNODB DEFAULT CHARSET=utf8;
– 分割函式
DROP FUNCTION IF EXISTS func_sub ;
DELIMITER //
CREATE FUNCTION func_sub(f_name VARCHAR(1000),f_comma VARCHAR(55),f_index INT)
RETURNS VARCHAR(255)
BEGIN
DECLARE result VARCHAR(255) DEFAULT ‘’;
SET result = REVERSE(SUBSTRING_INDEX(REVERSE(SUBSTRING_INDEX(f_name,f_comma,f_index)),f_comma,1));
RETURN result;
END//
– 拼接成多列列
DROP PROCEDURE IF EXISTS sub_proc ;
DELIMITER //
CREATE PROCEDURE sub_proc(IN f_name VARCHAR(1000))
BEGIN
DECLARE f_nameTemp VARCHAR(1000) DEFAULT ‘’; DECLARE f_comma VARCHAR(1000) DEFAULT ‘,’; DECLARE f_index INT(11) DEFAULT 1; DECLARE end_while INT(11) DEFAULT 0; DECLARE comma_index INT(11) DEFAULT 0; DECLARE result VARCHAR(2000) DEFAULT ‘’; DECLARE exe_sql VARCHAR(1000) DEFAULT ‘’;
SET f_nameTemp=f_name; WHILE 0=end_while DO SET comma_index=CAST(LOCATE(’,’,f_name) AS SIGNED INTEGER); IF comma_index=0 THEN SET end_while=1; END IF; SET f_name=SUBSTRING(f_name,LENGTH(SUBSTRING_INDEX(f_name,’,’,1))+2); SET result=CONCAT_WS(’,’,result,CONCAT(‘func_sub(’,CONCAT(’’’’,f_nameTemp,’’’’),CAST(f_comma AS CHAR),CONCAT(’’’’,CAST(f_comma AS CHAR),’’’’),CAST(f_comma AS CHAR),f_index,’)’)); SET f_index = f_index+1; SET comma_index=0; END WHILE; SET result=SUBSTRING(result,LENGTH(SUBSTRING_INDEX(result,’,’,0))+2); SET exe_sql=CONCAT(‘select ‘,result,’ FROM sub_array’); SET @exesql = exe_sql; PREPARE Statement FROM @exesql; EXECUTE Statement; DEALLOCATE PREPARE Statement; END//
CALL sub_proc(‘1,2,3,4,5,6,7,8’);