SQL Pro · Constraints · Integrity

Guarantee integrity with real constraints

Create and test PRIMARY KEY, FOREIGN KEY, UNIQUE, CHECK, NOT NULL and DEFAULT.

SQL Essentials

Unlock this exercise and continue the path.

Guarantee integrity with real constraints is part of the complete programme: 38 lessons, 62 verifiable exercises and 8 published guided projects.

  • Complete content with explained examples
  • SQL simulator and expected result
  • Detailed answer, common mistakes and challenge
View SQL EssentialsI already have access
Six-month access, one-time payment and no automatic renewal.