mysql - 如何在 MySQL 中搜索 json 值数组上的数据

Question

我从未使用过 json data 在我的数据库中存储任何值，现在的情况促使我使用它。

下面是我将其存储到 MySQL 数据库中的 json 格式

{
    "wrestling_board": [{
        "Price": "400",
        "Quantity": "1",
        "Amount": "400"
    }],
    "sign_board": [{
        "Price": "200",
        "Quantity": "1",
        "Amount": "200"
    }],
    "total": [{
        "Price": null,
        "Quantity": null,
        "Amount": "600"   <-- total price
    }]
}

Here is MySQL Demo:

如何搜索所有结果 其中total.amount > 3000？

Answer 1

更新: 如果您的字段是 json，您可以使用如下查询:

select 
    customer_name,company_name,email,quotation_data
from 
    sent_quotation_data1
where 
    cast(                                             --> as you want to check numeric operator I use cast to unsigned
        (replace(                                     --> as your data is between " I use replace to remove them
            quotation_data->"$.total[0].Amount"       --> Here you can extract json data
        ,'"','')) as unsigned
    ) > 3000;

MySQL Fiddle Demo

<小时/>

我认为一种方法是像这样使用REGEXP:

select 
   customer_name,company_name,email,quotation_data 
from 
   sent_quotation_data
where 
   quotation_data REGEXP '"total":.+"Amount":"(3[0-9][0-9][1-9]|[4-9][0-9]{3}|[1-9][0-9]{4,})"';

MySQL Fiddle Demo

"total":                     --> Finding total between " then :
.+                           --> Some characters
"Amount":"                   --> Finding Amount between " then : then "
(                            --> start a combination
    3[0-9][0-9][1-9]         --> accepting range of 3001-3999
    |                        --> or
    [4-9][0-9]{3}            --> accepting range of 4000-9999
    |                        --> or
    [1-9][0-9]{4,}           --> accepting range of 10000-...
)                            --> end of combination
"                            --> following by "