A foreign key to any unique column
Two ways to point at a row of another form — by id, or by any UNIQUE column. Why the second exists, and what building SQL against runtime tables costs.
Posts tagged with SQL.
Two ways to point at a row of another form — by id, or by any UNIQUE column. Why the second exists, and what building SQL against runtime tables costs.
Ci racconti le sue esigenze in IoT, GIS o sviluppo su misura — le rispondiamo entro 24 ore.