Cov nyhuv txhais
1. Cov ntaub ntawv tuaj yeem muab coj mus kuaj lossis hloov ua ntej sau ntawv rau cov ntaub ntawv cov ntaub ntawv.
2. Thaum muaj qhov yuam kev nyob rau hauv qhov txhais, qhov tshwm sim ntawm kev hloov khoom yuav raug muab tso tseg.
3. Qee qhov chaw tswj hwm cov ntaub ntawv yuav siv cov txhais rau cov lus txhais cov ntsiab lus (DDL), hu ua DDL triggers.
4. Raws li qhov xwm txheej tshwj xeeb, kev qhia ntawm kev hloov pauv (INSTEAD OF) tuaj yeem hloov tau.