表名:tb_test
json字段: detailImgs
要取的json中的字段:value
UPDATE tb_test alias
JOIN (
SELECT
id,
TRIM(BOTH '"' FROM Json_extract (detailImgs, "$[0].value") ) city,
TRIM(BOTH '"' FROM Json_extract (detailImgs, "$[1].value") ) county
FROM
tb_test
) AS json ON alias.id = json.id
SET alias.city = json.city,alias.county = json.county
注:TRIM是去除json中的双引号
