duanchi3109 2017-06-28 02:40
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如何回显包含用户ID的数据库中的行?

So I have a database called invoices and I have the user id in there and the date, I would like the user to be able to see all his invoices but not the others. So like my database is setup like

id | userid | amount | date | status

and I want the user to see his own invoices, how would I do that?

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  • doubiaokai4998 2017-06-28 02:43
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    That can be done with the query:

    SELECT * FROM invoices WHERE userid = [the userid of the user];
    

    You can also select specific columns of those rows like:

    SELECT amount FROM invoices WHERE userid = [the userid of the user];
    

    If you want more help, you'll have to explain what specifically you need help with!

    Hope this helps!

    Helpful Source - SQLCOURSE

    Edit

    Oh I see what you mean!

    When you create a user (using the INSERT command), you can use RETURNING to ask for information from the rows you just created/populated:

    INSERT INTO invoices (userid, amount, date, status) VALUES ([some userid], [some amount], [some date], [some status]) RETURNING id;

    This is assuming id is populated by a serial input. You can also ask for any or all of the other rows you just populated. For example:

    INSERT INTO invoices (id, userid, amount, date, status) VALUES ([some id], [some userid], [some amount], [some date], [some status]) RETURNING *;

    本回答被题主选为最佳回答 , 对您是否有帮助呢?
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