MYSQL Foreign Key not Updating Table -

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table 1: 

+--------------+-------------+------+-----+---------+----------------+ | field        | type        | null | key | default |          | +--------------+-------------+------+-----+---------+----------------+ | id           | int(11)     | no   | pri | null    | auto_increment | | fono         | int(11)     | no   | mul |         |                | | description  | varchar(25) | no   |     |         |                | | amount       | varchar(60) | no   |     |         |                | +--------------+-------------+------+-----+---------+----------------+

table 2:

+--------------+-------------+------+-----+---------+----------------+ | field        | type        | null | key | default |          | +--------------+-------------+------+-----+---------+----------------+ | fono         | int(11)     | no   | pri | null    | auto_increment | | finvno       | varchar(20) | no   |     |         |                | | description  | varchar(25) | no   |     |         |                | | amount       | varchar(60) | no   |     |         |                | +--------------+-------------+------+-----+---------+----------------+

i column fono in table 1 automatically value fono column in table 2. have set on update cascades.

although when records being entered fono column in table 1 remains empty.

why happening? can solve this?

thank you.

cascade happen on deleting , update primary key in foreign key defined cascade behavior , not insertion. 

on delete cascade  on update cascade

just check out more here


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