Mysql 5.7之後開始支援Json格式的原生欄位型別，現將json新特性作如下整理，僅供參考。

JSON函式的完整列表：

Mysql官方給出的json相關的函式，完整列表如下：

註釋：

• JSON_CONTAINS_PATH：【JSON_CONTAINS_PATH(`json_obj_test`,「'one'|'all'」,'$.remark','$.b')】
  • 'one': 1 if at least one path exists within the document, 0 otherwise.(至少有一個在此json（`json_obj_test`）段中，沒有返回0)
• • • SELECT `operator`, `json_arr_test` FROM lnmp WHERE JSON_CONTAINS_PATH(`json_obj_test`,'one','$.remark','$.b');
      • • 
  • 'all': 1 if all paths exist within the document, 0 otherwise.（變數全部在此JSON（`json_obj_test`）段中，否則查詢為0）
    • SELECT `operator`,`json_arr_test`FROM lnmp WHERE JSON_CONTAINS_PATH(`json_obj_test`,'all','$.remark','$.b');
      • • 

• JSON_EXTRACT：【JSON_EXTRACT(`json_obj_test`,'$.id') <=> `json_obj_test`->'$.id'】In MySQL 5.7.9 and later
  • SELECT `id`, `operator`, JSON_EXTRACT(`json_obj_test`,'$.id') FROM lnmp ORDER BY `json_obj_test`->'$.id';
  • SELECT `id`, `operator`, `json_obj_test`->'$.id' FROM lnmp ORDER BY `json_obj_test`->'$.id';

    • • • 

          UPDATE lnmp SET `name`="Wyaooo" WHERE `json_obj_test`->'$.id' = 1541560547;

          嚴格控制變數的資料型別，string型別一定要加引號

• JSON_SEARCH：【】
  • 'one': The search terminates after the first match and returns one path string. It is undefined which match is considered first.（返回匹配到的第一個元素的位置）
  • 'all': The search returns all matching path strings such that no duplicate paths are included. If there are multiple strings, they are autowrapped as an array. The order of the array elements is undefined.（返回匹配到的所有的元素的位置）

JSON_INSERT、JSON_REPLACE、JSON_SET三者的比較：

（1）JSON_SET()替換現有值，並新增新的值；

（2）JSON_INSERT()新增新值，但是並不會替換已經存在的值；

（3）JSON_REPLACE()只用來替換已經存在的值，否則不做操作。 

相關示例SQL語句如下：

DROP TABLE IF EXISTS `lnmp` ;
CREATE TABLE `lnmp` (
  `id`  INT(4) NOT NULL AUTO_INCREMENT,
  `operator` VARCHAR(8) NOT NULL DEFAULT '',
  `json_arr_test` JSON ,
  `json_obj_test` JSON ,
  PRIMARY KEY (`id`)
);
DESC `lnmp`;
SELECT * FROM lnmp;
INSERT INTO `lnmp` (`operator`, `json_arr_test`, `json_obj_test`) VALUES ('Mr.Wang',JSON_ARRAY(1,2),JSON_OBJECT('id',UNIX_TIMESTAMP(NOW()),'remark','這是第一條測試objcet的記錄'));
INSERT INTO `lnmp` (`operator`, `json_arr_test`, `json_obj_test`) VALUES ('Mr.Zhang',JSON_ARRAY(3,4),JSON_OBJECT('id',UNIX_TIMESTAMP(NOW()),'remark','大江東去浪淘盡'));
SELECT JSON_QUOTE('[1,2]');
SELECT `operator`, `json_arr_test` FROM lnmp WHERE JSON_CONTAINS(`json_obj_test`,'["這是第一條測試objcet的記錄"]','$.remark');
SELECT `operator`, `json_arr_test` FROM lnmp WHERE JSON_CONTAINS_PATH(`json_obj_test`,'all','$.remark','$.b');
SELECT `id`, `operator`, JSON_EXTRACT(`json_obj_test`,'$.id') FROM lnmp ORDER BY `json_obj_test`->'$.id';
SELECT `id`, `operator`, `json_obj_test`->'$.id' FROM lnmp ORDER BY `json_obj_test`->'$.id';
ALTER TABLE `lnmp` ADD COLUMN `name` VARCHAR(8) DEFAULT '' COMMENT '操作人姓名' AFTER `operator`;
UPDATE lnmp SET `name`='wyaooo' WHERE `json_obj_test`->'$.id' = 1541560547;
UPDATE lnmp SET `json_arr_test`=JSON_ARRAY_APPEND(`json_arr_test`,'$',JSON_OBJECT('code','01278923','name','Wyao')) WHERE `json_obj_test`->'$.id' = 1541560547;
SELECT JSON_KEYS(`json_obj_test`) FROM `lnmp` WHERE `json_obj_test`->'$.id' = 1541560547;
SELECT JSON_SEARCH(`json_arr_test`,'one','01278923') FROM lnmp;
UPDATE lnmp SET `json_arr_test` = JSON_ARRAY_INSERT(`json_arr_test`,'$[2]',JSON_OBJECT('course_code','02','course','Math')) WHERE `json_obj_test`->'$.id' = 1541560547;
UPDATE lnmp SET `json_obj_test` = JSON_INSERT(`json_obj_test`,'$.id',012923,'$.status',1) WHERE `json_obj_test`->'$.id' = 1541560547;
UPDATE lnmp SET `json_arr_test` = JSON_MERGE_PRESERVE(`json_arr_test`->'$[0]',`json_arr_test`->'$[1]') WHERE `json_obj_test`->'$.id' = 1541574430;
UPDATE lnmp SET `json_arr_test` = JSON_REMOVE(`json_arr_test`,'$[0]') WHERE `json_obj_test`->'$.id' = 1541574430;
UPDATE lnmp SET `json_arr_test` = JSON_REPLACE(`json_arr_test`,'$[0]','[true, false]') WHERE `json_obj_test`->'$.id' = 1541574430;
UPDATE lnmp SET `json_arr_test` = JSON_SET(`json_arr_test`,'$[0]','Wyao','$[1]','[true,false]') WHERE `json_obj_test`->'$.id' = 1541574430;
UPDATE lnmp SET `json_arr_test` = JSON_UNQUOTE(`json_arr_test`) WHERE `json_obj_test`->'$.id' = 1541574430;
SELECT `id`, `json_arr_test` FROM lnmp WHERE `json_obj_test`->'$.id' = 1541574430;
SELECT JSON_DEPTH(json_obj_test) FROM lnmp;
SELECT JSON_LENGTH(json_obj_test) FROM lnmp;
SELECT JSON_TYPE(json_arr_test) FROM lnmp;
SELECT JSON_VALID(json_arr_test) FROM lnmp;