Adding a primary key will automatically create a unique B-tree index on the column or
primary key of the po_headers table, which uniquely identifies purchase order in the
This is a good question, but a pretty crappy question too. Before you ask why an index slows down inserts, do you know what an index is?
a table but no columns, CockroachDB references the table's primary key.
You can adapt the code you found using ids: DELETE users u WHERE u.user_id = %s AND u.group_id = %s AND u.message_date IN ...
Optionally, we can tell PostgreSQL if this is "deferrable", that is, if we are allowed to violate referential
Step 2, insert values into your table like this, notice that mytable_key is not
Unlike other database systems e.g., MySQL and PostgreSQL, you cannot use
There is NO default "sort" order - even if there is an index on that column (which indeed is the case in Postgres: the primary key is supported by ...
Every once in awhile a table gets created without a primary key and duplicate