Suggest an editImprove this articleRefine the answer for “What does "Consistency" mean in ACID?”. Your changes go to moderation before they’re published.Approval requiredContentWhat you’re changing🇺🇸EN🇺🇦UAPreviewTitle (EN)Short answer (EN)**Consistency** means every transaction must **move the database from one valid state to another**, without breaking the rules, constraints, and relations that are set up; if something goes wrong during execution, the database **rolls back to its previous consistent state**. **Key point:** for example, if a table has a rule that the balance can't go negative, a transaction that would drive it negative **never commits** - the database keeps its data integrity.Shown above the full answer for quick recall.Answer (EN)Image**Consistency** means every transaction must **move the database from one valid state to another**, without breaking the rules, constraints, and relations that are set up. If something goes wrong during execution, the database **rolls back to its previous consistent state**. Example: if a table has a rule that the balance can never be negative, then a transaction that would drive it negative **never commits** - the database keeps its data integrity.For the reviewerNote to the moderator (optional)Visible only to the moderator. Helps review go faster.