MYSQL查询某字段中以逗号分隔的字符串的方法
CREATE TABLE test(id int(6) NOT NULL AUTO_INCREMENT,PRIMARY KEY (id),pname VARCHAR(20) NOT NULL,pnum VARCHAR(50) NOT NULL);
然后插入带有逗号分隔的测试数据
INSERT INTO test(pname,pnum) VALUES(\'产品1\',\'1,2,4\');
INSERT INTO test(pname,pnum) VALUES(\'产品2\',\'2,4,7\');
INSERT INTO test(pname,pnum) VALUES(\'产品3\',\'3,4\');
INSERT INTO test(pname,pnum) VALUES(\'产品4\',\'1,7,8,9\');
INSERT INTO test(pname,pnum) VALUES(\'产品5\',\'33,4\');
查找pnum字段中包含3或者9的记录
mysql> SELECT * FROM test WHERE find_in_set(\'3\',pnum) OR find_in_set(\'9\',pnum);
+----+-------+---------+
| id | pname | pnum |
+----+-------+---------+
| 3 | 产品3 | 3,4 |
| 4 | 产品4 | 1,7,8,9 |
+----+-------+---------+
2 rows in set (0.03 sec)
使用正则
mysql> SELECT * FROM test WHERE pnum REGEXP \'(3|9)\';
+----+-------+---------+
| id | pname | pnum |
+----+-------+---------+
| 3 | 产品3 | 3,4 |
| 4 | 产品4 | 1,7,8,9 |
| 5 | 产品5 | 33,4 |
+----+-------+---------+
3 rows in set (0.02 sec)
这样会产生多条记录,比如33也被查找出来了。
换一种方式
mysql> SELECT * FROM test WHERE CONCAT(\',\',pnum,\',\') REGEXP \'[^0-9]+[3|9][^0-9]+\';
+----+-------+---------+
| id | pname | pnum |
+----+-------+---------+
| 3 | 产品3 | 3,4 |
| 4 | 产品4 | 1,7,8,9 |
+----+-------+---------+
2 rows in set (0.01 sec)
问题解决。。。