select json_unquote(json_extract(content,'$.name')) from test_json where id = 1; # 简写方式:字段名->>表达式等价于json_unquote(json_extract(字段名,表达式)) select content->>'$.name' from test_json where id = 1; # 结果: +---+ | json_unquote(json_extract(content,'$.name')) | ...
select content->'$age' from test_json where id = 1;# 结果:ERROR 3143 (42000): Invalid JSON path expression. The error is around character position 1.登录后复制 五、使用场景 JSON_EXTRACT函数通常用于要获取JSON中某个特定的数据或者要根据它作为判断条件时使用...
mysql> select json_extract( '{"":42}', '$.""'); ERROR 3143 (42000): Invalid JSON path expression. The error is around character position 4 in '$.""'. I'm not an expert on JSON, but my best guess is that empty strings are valid keys. How to repeat: Shown in the description...
首先创建一张 students 表 SQL脚本如下： create table students( id int primary key auto_increme...
ERROR 3143 (42000): Invalid JSON path expression. The error is around character position 11 in '$.@xsi:type'. What is the correct syntax to create the virtual column on "@xsi:type" attribute? Subject Written By Posted extract attribute (with special character in name) value from json-type...
( -> json_extract( -> json_keys(object),'$['||0||']' -> ) -> ) -> ) -> ) -> as objectElement -> -> from ( -> select json_object("A bad key","irrevant") as object -> ) as sample_data -> -> ) as myObject; ERROR 3143 (42000): Invalid JSON path expression. ...
{"id":"CreateGroupHubPage","type":"GROUP_HUB","urlPath":"/groups/create","__typename":"PageDescriptor"},"__typename":"PageResource"},{"lastUpdatedTime":1741258346277,"localOverride":null,"page":{"id":"CaseViewPage","type":"CASE_DETAILS","urlPath":"/case/:caseId...
json_extract函数中,第一个参数content表示json数据,第二个参数为json路径,其中$表示该json数据本身,$.name就表示获取json中key为name的value值 可以利用 -> 表达式来代替json_extract 若获取的val本身为字符串,那么获取的val会被引号包起来,比如”tom”,这种数据被解析到程序对象中时,可能会被转义为\“tom\”。
MySQL会对JSON路径中的破折号产生问题。因此，我将查询修改如下：
selectjson_unquote(json_extract(content,'$.name'))fromtest_jsonwhereid=1; # 简写方式:字段名->>表达式等价于json_unquote(json_extract(字段名,表达式)) selectcontent->>'$.name'fromtest_jsonwhereid=1; # 结果: +---+ |json_unquote(json_extract(content,'$.name'))| +---+ |tom|...