使用 PHP MySQL 删除行并移动到另一个表

Question

I want to delete a row from my table and move that deleted row to another table.

Table Structure:

tbl_problem
    - problem_id
    - problem_date
    - problem_title

tbl_problem_done
    - problem_done_id
    - problem_done_date
    - problem_done_title

My query:

$sql = "INSERT INTO tbl_problem_done SELECT * FROM tbl_problem WHERE problem_id=$problem_id";

I can copy the data using the query above. Now I want to delete the data using this query:

"DELETE FROM tbl_problem WHERE problem_id=$problem_id";

How do I combine this query from the previous query?

Answer 1

Your approach to this is wrong, really. This data should all be in one table. Then you'd UPDATE the problem to set its "done" column to true and set the date that it happened. Your current data structure is denormalised.

eg table structure:

tbl_problem
    - problem_id
    - problem_date
    - problem_title
    - problem_done
    - problem_done_date

query:

UPDATE tbl_problem SET problem_done = 1, problem_done_date = NOW() WHERE problem_id = 123

Then to select all current problems:

SELECT * FROM tbl_problem WHERE problem_done = 0

And to get all done problems, obviously it's:

SELECT * FROM tbl_problem WHERE problem_done = 1

And now you also have data showing the date when it was marked done, which may be useful.