Question

The “INSERT OR UPDATE” statements are available in Oracle if i am not wrong. The possibility to create a new row if the primary key doesn’t exists or update that row otherwise. Or is it only possible using some Stored Procedure or Stored Function?

Answer 1

MySQL:

INSERT [LOW_PRIORITY | DELAYED | HIGH_PRIORITY] [IGNORE]
    [INTO] tbl_name [(col_name,...)]
    {VALUES | VALUE} ({expr | DEFAULT},...),(...),...
    [ ON DUPLICATE KEY UPDATE
      col_name=expr
        [, col_name=expr] ... ]

For SQLite, you would use ON CONFLICT REPLACE

– See http://www.sqlite.org/lang_conflict.html

REPLACE When a UNIQUE constraint
violation occurs, the REPLACE
algorithm deletes pre-existing rows
that are causing the constraint
violation prior to inserting or
updating the current row and the
command continues executing normally.
If a NOT NULL constraint violation
occurs, the REPLACE conflict
resolution replaces the NULL value
with he default value for that column,
or if the column has no default value,
then the ABORT algorithm is used. If a
CHECK constraint violation occurs, the
REPLACE conflict resolution algorithm
always works like ABORT.

When the REPLACE conflict resolution
strategy deletes rows in order to
satisfy a constraint, delete triggers
fire if and only if recursive triggers
are enabled.

The update hook is not invoked for
rows that are deleted by the REPLACE
conflict resolution strategy. Nor does
REPLACE increment the change counter.
The exceptional behaviors defined in
this paragraph might change in a
future release.