MySQL—sql statement multiple fields fuzzy query and specify priority sorting

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need

  When doing some product development, it is necessary to fill in a name or code in a fill-in box for precise or fuzzy queries. Require:

1. A fill-in box is used for fuzzy query of multiple fields in the underlying data table structure.
2. Sorting of query results: sort by name first, then sort by code, if not found, sort by time.

practice

method

Use order byfits case when...then...语句.

build table

CREATE TABLE `t1` (
  `id` int NOT NULL AUTO_INCREMENT,
  `name` varchar(255) DEFAULT NULL,
  `code` varchar(255) DEFAULT NULL,
  `create_time` datetime DEFAULT NULL,
  PRIMARY KEY (`id`)
) ENGINE=InnoDB AUTO_INCREMENT=1 DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_0900_ai_ci;

insert

INSERT INTO `testdb`.`t1` (`id`, `name`, `code`, `create_time`) VALUES (1, '中国苏州', 'chinasz', '2023-03-13 11:20:51');
INSERT INTO `testdb`.`t1` (`id`, `name`, `code`, `create_time`) VALUES (2, '中国苏州常熟', 'chinaszcs', '2023-03-13 11:22:52');
INSERT INTO `testdb`.`t1` (`id`, `name`, `code`, `create_time`) VALUES (3, '中国江苏', 'chinajs', '2023-03-11 11:20:52');
INSERT INTO `testdb`.`t1` (`id`, `name`, `code`, `create_time`) VALUES (4, '江苏', 'js', '2023-03-12 11:20:52');
INSERT INTO `testdb`.`t1` (`id`, `name`, `code`, `create_time`) VALUES (5, '中国江苏盐城', 'chinajsyc', '2023-03-13 11:10:52');
INSERT INTO `testdb`.`t1` (`id`, `name`, `code`, `create_time`) VALUES (6, '江苏盐城', 'jsyc', '2023-03-13 11:11:52');
INSERT INTO `testdb`.`t1` (`id`, `name`, `code`, `create_time`) VALUES (7, '中国江苏无锡', 'chinajswx', '2023-03-10 11:20:52');
INSERT INTO `testdb`.`t1` (`id`, `name`, `code`, `create_time`) VALUES (8, '江苏常州', 'jscz', '2023-02-13 11:20:52');
INSERT INTO `testdb`.`t1` (`id`, `name`, `code`, `create_time`) VALUES (9, '中国', 'china', '2023-01-13 11:20:52');
INSERT INTO `testdb`.`t1` (`id`, `name`, `code`, `create_time`) VALUES (10, '江苏苏州', 'jssz', '2023-03-11 11:20:52');
INSERT INTO `testdb`.`t1` (`id`, `name`, `code`, `create_time`) VALUES (11, '江浙沪', 'jzh', '2023-03-13 11:20:40');
INSERT INTO `testdb`.`t1` (`id`, `name`, `code`, `create_time`) VALUES (12, '江苏001', 'js001', '2023-03-11 11:20:52');
INSERT INTO `testdb`.`t1` (`id`, `name`, `code`, `create_time`) VALUES (13, '中国江苏省', 'chinajss', '2023-03-13 11:20:52');
INSERT INTO `testdb`.`t1` (`id`, `name`, `code`, `create_time`) VALUES (14, '江苏省', 'jss', '2023-03-13 12:19:03');
INSERT INTO `testdb`.`t1` (`id`, `name`, `code`, `create_time`) VALUES (15, '新加坡', 'singapore', '2023-03-13 12:19:17');
INSERT INTO `testdb`.`t1` (`id`, `name`, `code`, `create_time`) VALUES (16, '日本', 'japan', '2023-03-13 12:19:37');

Sort query

global query

sql statement

select * from t1 group by id ORDER BY create_time DESC;

search result

mysql> select * from t1 group by id ORDER BY create_time DESC;
+----+--------------------+-----------+---------------------+
| id | name               | code      | create_time         |
+----+--------------------+-----------+---------------------+
| 16 | 日本             | japan     | 2023-03-13 12:19:37 |
| 15 | 新加坡          | singapore | 2023-03-13 12:19:17 |
| 14 | 江苏省          | jss       | 2023-03-13 12:19:03 |
|  2 | 中国苏州常熟 | chinaszcs | 2023-03-13 11:22:52 |
| 13 | 中国江苏省    | chinajss  | 2023-03-13 11:20:52 |
|  1 | 中国苏州       | chinasz   | 2023-03-13 11:20:51 |
| 11 | 江浙沪          | jzh       | 2023-03-13 11:20:40 |
|  6 | 江苏盐城       | jsyc      | 2023-03-13 11:11:52 |
|  5 | 中国江苏盐城 | chinajsyc | 2023-03-13 11:10:52 |
|  4 | 江苏             | js        | 2023-03-12 11:20:52 |
|  3 | 中国江苏       | chinajs   | 2023-03-11 11:20:52 |
| 10 | 江苏苏州       | jssz      | 2023-03-11 11:20:52 |
| 12 | 江苏001          | js001     | 2023-03-11 11:20:52 |
|  7 | 中国江苏无锡 | chinajswx | 2023-03-10 11:20:52 |
|  8 | 江苏常州       | jscz      | 2023-02-13 11:20:52 |
|  9 | 中国             | china     | 2023-01-13 11:20:52 |
+----+--------------------+-----------+---------------------+
16 rows in set (0.00 sec)

Query without input parameters

sql statement

set @a = '';
select t.id, t.`name`,t.`code`,t.create_time
from t1 t where t.`name` like concat('%',@a,'%') 
or t.`code` like concat('%',@a,'%') group by t.id 
order by(
case 
when t.`name` = @a then 1 
when t.`code` = @a then 2
when t.`name` like concat(@a,'%') then 3
when t.`name` like concat('%',@a,'%') then 4
when t.`name` like concat('%',@a) then 5
when t.`code` like concat(@a,'%') then 6
when t.`code` like concat('%',@a,'%') then 7
when t.`code` like concat(@a,'%') then 8
else 9
end) 
asc, t.create_time desc;

+----+--------------------+-----------+---------------------+
| id | name               | code      | create_time         |
+----+--------------------+-----------+---------------------+
| 16 | 日本             | japan     | 2023-03-13 12:19:37 |
| 15 | 新加坡          | singapore | 2023-03-13 12:19:17 |
| 14 | 江苏省          | jss       | 2023-03-13 12:19:03 |
|  2 | 中国苏州常熟 | chinaszcs | 2023-03-13 11:22:52 |
| 13 | 中国江苏省    | chinajss  | 2023-03-13 11:20:52 |
|  1 | 中国苏州       | chinasz   | 2023-03-13 11:20:51 |
| 11 | 江浙沪          | jzh       | 2023-03-13 11:20:40 |
|  6 | 江苏盐城       | jsyc      | 2023-03-13 11:11:52 |
|  5 | 中国江苏盐城 | chinajsyc | 2023-03-13 11:10:52 |
|  4 | 江苏             | js        | 2023-03-12 11:20:52 |
|  3 | 中国江苏       | chinajs   | 2023-03-11 11:20:52 |
| 10 | 江苏苏州       | jssz      | 2023-03-11 11:20:52 |
| 12 | 江苏001          | js001     | 2023-03-11 11:20:52 |
|  7 | 中国江苏无锡 | chinajswx | 2023-03-10 11:20:52 |
|  8 | 江苏常州       | jscz      | 2023-02-13 11:20:52 |
|  9 | 中国             | china     | 2023-01-13 11:20:52 |
+----+--------------------+-----------+---------------------+
16 rows in set (0.00 sec)

Enter query parameters

sql statement

set @a = 'js';
select t.id, t.`name`,t.`code`,t.create_time
from t1 t where t.`name` like concat('%',@a,'%') 
or t.`code` like concat('%',@a,'%') group by t.id 
order by(
case 
when t.`name` = @a then 1 
when t.`code` = @a then 2
when t.`name` like concat(@a,'%') then 3
when t.`name` like concat('%',@a,'%') then 4
when t.`name` like concat('%',@a) then 5
when t.`code` like concat(@a,'%') then 6
when t.`code` like concat('%',@a,'%') then 7
when t.`code` like concat(@a,'%') then 8
else 9
end) 
asc, t.create_time desc;

result

+----+--------------------+-----------+---------------------+
| id | name               | code      | create_time         |
+----+--------------------+-----------+---------------------+
|  4 | 江苏             | js        | 2023-03-12 11:20:52 |
| 14 | 江苏省          | jss       | 2023-03-13 12:19:03 |
|  6 | 江苏盐城       | jsyc      | 2023-03-13 11:11:52 |
| 10 | 江苏苏州       | jssz      | 2023-03-11 11:20:52 |
| 12 | 江苏001          | js001     | 2023-03-11 11:20:52 |
|  8 | 江苏常州       | jscz      | 2023-02-13 11:20:52 |
| 13 | 中国江苏省    | chinajss  | 2023-03-13 11:20:52 |
|  5 | 中国江苏盐城 | chinajsyc | 2023-03-13 11:10:52 |
|  3 | 中国江苏       | chinajs   | 2023-03-11 11:20:52 |
|  7 | 中国江苏无锡 | chinajswx | 2023-03-10 11:20:52 |
+----+--------------------+-----------+---------------------+
10 rows in set (0.00 sec)