SQL Server解析/操作Json格式字段数据的方法实例

CREATE TABLE demo_plus.dbo.wm_json_demo (
	id int IDENTITY(1,1) NOT NULL,
	json_detail varchar(max) NOT NULL,
	CONSTRAINT PK_wm_json_demo PRIMARY KEY (id)
);

INSERT INTO demo_plus.dbo.wm_json_demo (json_detail) VALUES('{"key":3,"value1":10,"value2":[{"vv21":13,"vv22":103}],"value3":null}');
INSERT INTO demo_plus.dbo.wm_json_demo (json_detail) VALUES('{"key":4,"value1":15,"value2":[{"vv21":13,"vv22":103}],"value3":"10"}');
INSERT INTO demo_plus.dbo.wm_json_demo (json_detail) VALUES('{"key":7,"value1":20,"value2":[{"vv21":13,"vv22":103}],"value3":"15"}');

SELECT
	IsJson(json_detail) as IsJson
from
	demo_plus.dbo.wm_json_demo

SELECT
	JSON_VALUE(json_detail,'$.key') as 'key',
	JSON_VALUE(json_detail,'$.value1') as value1,
	JSON_value(json_detail,'$.value2') as value2,
	JSON_QUERY(json_detail,'$.value2') as value2_query,
	JSON_VALUE(json_detail,'$.value3') as value3
from demo_plus.dbo.wm_json_demo;

SELECT
	JSON_MODIFY(json_detail,
	'$.value1',
	11) as json_detail
from
	demo_plus.dbo.wm_json_demo
where
	JSON_VALUE(json_detail,
	'$.key')= 7;