使用REGEXP的MYSQL查询-使其不贪婪

我需要一些关于MYSQL查询正则表达式的帮助，以搜索包含具有精确模式的单元格的行。我是MYSQL正则表达式的新手

这是一个名为test_table的示例表（json_值是数组的json字符串）

如果要使用以下命令获取所有行：

- field_4 containing "quality" string, the query should to return id 1 and 4
- field_9 containing "quality" string, the query should to return id 1 and 2
- field_4 containing "ordering" string, the query should to return id 2 and 3

我希望这个例子是结论

我已尝试使用此查询

SELECT id from test_table WHERE json_value REGEXP 'field_4":".*quality.*';

但是返回id 1、2和4，因为它是贪婪的，并在第2行的字段_9处找到“质量”

另一个问题是（我知道，这是一个愚蠢的正则表达式）

但只返回id 1

我在网上读了很多帖子，但都没有成功。 正则表达式应该如何获得正确的行

编辑 再想一想，更明确地说，搜索的第一个工作是数组中的完整键，但第二个是部分值，如“%substring%”

---

谢谢

这是我能想到的最好的办法：

SELECT id from test_table WHERE json_value REGEXP 'field_4":"[^"]*quality';

鉴于您提供的数据，它符合您的要求。但是，如果您的JSON包含嵌入/转义双引号，则会中断，如：

+----+----------------------------------------------------------------------------------------------------------------+
| id | json_value                                                                                                     |
+----+----------------------------------------------------------------------------------------------------------------+
|  1 | {"field_198":false,"field_4":"From quality office","field_9":"product with high quality","field_10":"comment"} |
|  2 | {"field_198":true,"field_4":"From ordering office","field_9":"back to quality office","field_10":"comment"}    |
|  3 | {"field_198":true,"field_4":"From ordering office","field_9":"cancelled","field_10":"comment"}                 |
|  4 | {"field_198":true,"field_4":"Return to quality office","field_9":"product ok","field_10":"comment"}            |
|  5 | {"field_198":true,"field_4":"Return to \"quality\" office","field_9":"product ok","field_10":"comment"}        |
+----+----------------------------------------------------------------------------------------------------------------+
5 rows in set (0.00 sec)

mysql> SELECT id from test_table WHERE json_value REGEXP 'field_4":"[^"]*quality';
+----+
| id |
+----+
|  1 |
|  4 |
+----+
2 rows in set (0.01 sec)

---

在这种情况下，我想您应该希望返回id=5的行，但事实并非如此。但是如果你有这样的数据，我想你别无选择，只能真正解析它，而正则表达式不会起作用。

如果你使用的是mysql 5.7，请查看JSON_contains我使用的是带有mysql 5.6.28的Cpanel

SELECT id from test_table WHERE json_value REGEXP 'field_4":"[^"]*quality';

+----+----------------------------------------------------------------------------------------------------------------+
| id | json_value                                                                                                     |
+----+----------------------------------------------------------------------------------------------------------------+
|  1 | {"field_198":false,"field_4":"From quality office","field_9":"product with high quality","field_10":"comment"} |
|  2 | {"field_198":true,"field_4":"From ordering office","field_9":"back to quality office","field_10":"comment"}    |
|  3 | {"field_198":true,"field_4":"From ordering office","field_9":"cancelled","field_10":"comment"}                 |
|  4 | {"field_198":true,"field_4":"Return to quality office","field_9":"product ok","field_10":"comment"}            |
|  5 | {"field_198":true,"field_4":"Return to \"quality\" office","field_9":"product ok","field_10":"comment"}        |
+----+----------------------------------------------------------------------------------------------------------------+
5 rows in set (0.00 sec)

mysql> SELECT id from test_table WHERE json_value REGEXP 'field_4":"[^"]*quality';
+----+
| id |
+----+
|  1 |
|  4 |
+----+
2 rows in set (0.01 sec)