查询cart_info中的seckillId,
select json_extract( `parm1`, '$.parm2' ) from cart .
select json_extract( `parm1`, '$.parm2' ) from cart .
select json_extract( `cartInfo`.`cart_info`, '$.seckillId' ) from cart
本文标题:sql中查看json字符串某一key值
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