MySql逗号拼接字符串查询

下面两个函数的使用和FIND_IN_SET一样,使用时只需要把FIND_IN_SET换成FIND_PART_IN_SET或FIND_ALL_PART_IN_SET

例如某字段里是为1,2,3,4,5 

使用方法:

第一种,传入1,3,6  可以查出来

select * from XXX where FIND_PART_IN_SET('1,3,6','1,2,3,4,5')

第二种,传入1,3,6  查不出来

select * from XXX where FIND_ALL_PART_IN_SET('1,3,6','1,2,3,4,5')

函数:

第一种:只要包含其中一个就可以被查出来

CREATE DEFINER = `root`@`%` FUNCTION `NewProc`(str1 text,str2 text)
 RETURNS text
BEGIN

	#传入两个逗号分割的字符串，判断第二个字符串是否包含第一个字符串split之后的单个
DECLARE CURRENTINDEX INT;#当前下标
DECLARE CURRENTSTR text;
DECLARE result int;

set result = 0;
set CURRENTINDEX = 0;
set CURRENTSTR = '';

IF str1 IS NOT NULL AND str1 != '' THEN
	SET CURRENTINDEX = LOCATE(',',str1);
	WHILE CURRENTINDEX > 0 DO
		SET CURRENTSTR = substring(str1,1,CURRENTINDEX-1);
		if FIND_IN_SET(CURRENTSTR,str2) THEN
			set result = 1;
		end if;
		SET str1 = substring(str1,CURRENTINDEX+1);
		SET CURRENTINDEX = LOCATE(',',str1);
	END WHILE;
	#只传一个 和  最后无逗号的情况
	IF LENGTH(str1) > 0 THEN
		if FIND_IN_SET(str1,str2) THEN
			set result = 1;
		end if;
	END IF;
END IF;
RETURN result;
END;

第二种:必须全部包含才可以被查出来

CREATE DEFINER = `root`@`%` FUNCTION `NewProc`(str1 text,str2 text)
 RETURNS text
BEGIN

	#传入两个逗号分割的字符串，判断第二个字符串是否全部包含第一个字符串split之后的单个
DECLARE CURRENTINDEX INT;#当前下标
DECLARE CURRENTSTR text;
DECLARE RESULT int;
DECLARE TOTALCOUNT int;
DECLARE TRUECOUNT int;



set RESULT = 0;
set CURRENTINDEX = 0;
set CURRENTSTR = '';
set TOTALCOUNT = 0;
set TRUECOUNT = 0;

IF str1 IS NOT NULL AND str1 != '' THEN
	SET CURRENTINDEX = LOCATE(',',str1);
	WHILE CURRENTINDEX > 0 DO
		SET TOTALCOUNT = TOTALCOUNT + 1;
		SET CURRENTSTR = substring(str1,1,CURRENTINDEX-1);
		if FIND_IN_SET(CURRENTSTR,str2) THEN
			SET TRUECOUNT = TRUECOUNT + 1;
		end if;
		SET str1 = substring(str1,CURRENTINDEX+1);
		SET CURRENTINDEX = LOCATE(',',str1);
	END WHILE;
	#只传一个 和  最后无逗号的情况
	IF LENGTH(str1) > 0 THEN
		SET TOTALCOUNT = TOTALCOUNT + 1;
		if FIND_IN_SET(str1,str2) THEN
			SET TRUECOUNT = TRUECOUNT + 1;
		end if;
	END IF;
END IF;

IF TOTALCOUNT > 0 AND  TRUECOUNT = TOTALCOUNT THEN	
		SET RESULT = 1;
END IF;

RETURN result;
END;