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change create table foreign key with better function to modify and de… #7

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6 changes: 4 additions & 2 deletions content/sql/create-table-foreign-key.md
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Expand Up @@ -9,12 +9,14 @@ github: https://github.com/zernonia

Add foreign key to product_id using `references`.

`on delete cascade` When a referenced foreign key is deleted or updated, all rows referencing that key are deleted or updated, respectively.
`on delete cascade` When a referenced foreign key is deleted, all rows referencing that key are deleted, respectively.

`on update cascade` When a referenced foreign key is updated, all rows referencing that key are updated, respectively.

```sql
create table table_name (
id bigint generated by default as identity primary key,
product_id uuid references products (id) on delete cascade,
product_id uuid references products (id) on delete cascade on update cascade,
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@zernonia zernonia Oct 4, 2021

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I think it will be better if on update cascade is placed on another sql script below, instead of appending it to the end.

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@adinoid adinoid Oct 5, 2021

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I usually use on delete cascade on update cascade to make it more optimal and avoid errors

data jsonb,
name text
);
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